[RFC PATCH] zcache2 cleanups (s/int/bool + debugfs movement).

[RFC PATCH] zcache2 cleanups (s/int/bool + debugfs movement).

[Konrad Rzeszutek Wilk]

Looking at the zcache2 code there were a couple of things that I thought
would make sense to move out of the code. For one thing it makes it easier
to read, and for anoter - it can be cleanly compiled out. It also allows
to have a clean seperation of counters that we _need_ vs the optional ones.
Which means that in the future we could get rid of the optional ones.

This patchset is based on the patchset that Dan sent out
(https://lkml.org/lkml/2012/10/31/790). I've stuck
them (and addressed some review comments) and put them in my branch:

 git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm.git devel/zcache.v3

I am going to repost the module loading some time later this week - Bob Liu had
some comments that I want to address.

So back to this patchset - it fixes some outstanding compile warnings, cleans
up some of the code, and rips out the debug counters out of zcache-main.c
and sticks them in a debug.c file.

I was hoping it would end up with less code, but sadly it ended up with
a bit more due to the empty non-debug functions.

 drivers/staging/ramster/Kconfig       |    8 +
 drivers/staging/ramster/Makefile      |    1 +
 drivers/staging/ramster/debug.c       |   66 ++++++
 drivers/staging/ramster/debug.h       |  225 +++++++++++++++++++
 drivers/staging/ramster/zcache-main.c |  384 ++++++++-------------------------
 5 files changed, 389 insertions(+), 295 deletions(-)

Konrad Rzeszutek Wilk (11):
      zcache2: s/int/bool/ on the various options.
      zcache: Module license is defined twice.
      zcache: Provide accessory functions for counter increase
      zcache: Provide accessory functions for counter decrease.
      zcache: The last of the atomic reads has now an accessory function.
      zcache: Fix compile warnings due to usage of debugfs_create_size_t
      zcache: Make the debug code use pr_debug
      zcache: Move debugfs code out of zcache-main.c file.
      zcache: Use an array to initialize/use debugfs attributes.
      zcache: Move the last of the debugfs counters out
      zcache: Coalesce all debug under CONFIG_ZCACHE2_DEBUG

[RFC PATCH] zcache2 cleanups (s/int/bool + debugfs movement).

[Konrad Rzeszutek Wilk]

Looking at the zcache2 code there were a couple of things that I thought
would make sense to move out of the code. For one thing it makes it easier
to read, and for anoter - it can be cleanly compiled out. It also allows
to have a clean seperation of counters that we _need_ vs the optional ones.
Which means that in the future we could get rid of the optional ones.

This patchset is based on the patchset that Dan sent out
(https://lkml.org/lkml/2012/10/31/790). I've stuck
them (and addressed some review comments) and put them in my branch:

 git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm.git devel/zcache.v3

I am going to repost the module loading some time later this week - Bob Liu had
some comments that I want to address.

So back to this patchset - it fixes some outstanding compile warnings, cleans
up some of the code, and rips out the debug counters out of zcache-main.c
and sticks them in a debug.c file.

I was hoping it would end up with less code, but sadly it ended up with
a bit more due to the empty non-debug functions.

 drivers/staging/ramster/Kconfig       |    8 +
 drivers/staging/ramster/Makefile      |    1 +
 drivers/staging/ramster/debug.c       |   66 ++++++
 drivers/staging/ramster/debug.h       |  225 +++++++++++++++++++
 drivers/staging/ramster/zcache-main.c |  384 ++++++++-------------------------
 5 files changed, 389 insertions(+), 295 deletions(-)

Konrad Rzeszutek Wilk (11):
      zcache2: s/int/bool/ on the various options.
      zcache: Module license is defined twice.
      zcache: Provide accessory functions for counter increase
      zcache: Provide accessory functions for counter decrease.
      zcache: The last of the atomic reads has now an accessory function.
      zcache: Fix compile warnings due to usage of debugfs_create_size_t
      zcache: Make the debug code use pr_debug
      zcache: Move debugfs code out of zcache-main.c file.
      zcache: Use an array to initialize/use debugfs attributes.
      zcache: Move the last of the debugfs counters out
      zcache: Coalesce all debug under CONFIG_ZCACHE2_DEBUG

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[PATCH 01/11] zcache2: s/int/bool/ on the various options.

[Konrad Rzeszutek Wilk]

There are so many, but this allows us to at least have them
right in as bool.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |   46 ++++++++++++++++----------------
 1 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 42a9d81..5c0c7db 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -30,11 +30,11 @@
 #include "zbud.h"
 #include "ramster.h"
 #ifdef CONFIG_RAMSTER
-static int ramster_enabled;
-static int disable_frontswap_selfshrink;
+static bool ramster_enabled __read_mostly;
+static bool disable_frontswap_selfshrink __read_mostly;
 #else
-#define ramster_enabled 0
-#define disable_frontswap_selfshrink 0
+#define ramster_enabled false
+#define disable_frontswap_selfshrink false
 #endif
 
 #ifndef __PG_WAS_ACTIVE
@@ -57,11 +57,11 @@ static inline void frontswap_tmem_exclusive_gets(bool b)
 }
 #endif
 
-static int zcache_enabled __read_mostly;
-static int disable_cleancache __read_mostly;
-static int disable_frontswap __read_mostly;
-static int disable_frontswap_ignore_nonactive __read_mostly;
-static int disable_cleancache_ignore_nonactive __read_mostly;
+static bool zcache_enabled __read_mostly;
+static bool disable_cleancache __read_mostly;
+static bool disable_frontswap __read_mostly;
+static bool disable_frontswap_ignore_nonactive __read_mostly;
+static bool disable_cleancache_ignore_nonactive __read_mostly;
 static char *namestr __read_mostly = "zcache";
 
 #define ZCACHE_GFP_MASK \
@@ -1649,16 +1649,16 @@ struct frontswap_ops zcache_frontswap_register_ops(void)
 #ifndef CONFIG_ZCACHE2_MODULE
 static int __init enable_zcache(char *s)
 {
-	zcache_enabled = 1;
+	zcache_enabled = true;
 	return 1;
 }
 __setup("zcache", enable_zcache);
 
 static int __init enable_ramster(char *s)
 {
-	zcache_enabled = 1;
+	zcache_enabled = true;
 #ifdef CONFIG_RAMSTER
-	ramster_enabled = 1;
+	ramster_enabled = true;
 #endif
 	return 1;
 }
@@ -1668,7 +1668,7 @@ __setup("ramster", enable_ramster);
 
 static int __init no_cleancache(char *s)
 {
-	disable_cleancache = 1;
+	disable_cleancache = true;
 	return 1;
 }
 
@@ -1676,7 +1676,7 @@ __setup("nocleancache", no_cleancache);
 
 static int __init no_frontswap(char *s)
 {
-	disable_frontswap = 1;
+	disable_frontswap = true;
 	return 1;
 }
 
@@ -1692,7 +1692,7 @@ __setup("nofrontswapexclusivegets", no_frontswap_exclusive_gets);
 
 static int __init no_frontswap_ignore_nonactive(char *s)
 {
-	disable_frontswap_ignore_nonactive = 1;
+	disable_frontswap_ignore_nonactive = true;
 	return 1;
 }
 
@@ -1700,7 +1700,7 @@ __setup("nofrontswapignorenonactive", no_frontswap_ignore_nonactive);
 
 static int __init no_cleancache_ignore_nonactive(char *s)
 {
-	disable_cleancache_ignore_nonactive = 1;
+	disable_cleancache_ignore_nonactive = true;
 	return 1;
 }
 
@@ -1709,7 +1709,7 @@ __setup("nocleancacheignorenonactive", no_cleancache_ignore_nonactive);
 static int __init enable_zcache_compressor(char *s)
 {
 	strncpy(zcache_comp_name, s, ZCACHE_COMP_NAME_SZ);
-	zcache_enabled = 1;
+	zcache_enabled = true;
 	return 1;
 }
 __setup("zcache=", enable_zcache_compressor);
@@ -1759,7 +1759,7 @@ static int zcache_init(void)
 	int ret = 0;
 
 #ifdef CONFIG_ZCACHE2_MODULE
-	zcache_enabled = 1;
+	zcache_enabled = true;
 #endif
 	if (ramster_enabled) {
 		namestr = "ramster";
@@ -1840,15 +1840,15 @@ out:
 
 #ifdef CONFIG_ZCACHE2_MODULE
 #ifdef CONFIG_RAMSTER
-module_param(ramster_enabled, int, S_IRUGO);
-module_param(disable_frontswap_selfshrink, int, S_IRUGO);
+module_param(ramster_enabled, bool, S_IRUGO);
+module_param(disable_frontswap_selfshrink, bool, S_IRUGO);
 #endif
-module_param(disable_cleancache, int, S_IRUGO);
-module_param(disable_frontswap, int, S_IRUGO);
+module_param(disable_cleancache, bool, S_IRUGO);
+module_param(disable_frontswap, bool, S_IRUGO);
 #ifdef FRONTSWAP_HAS_EXCLUSIVE_GETS
 module_param(frontswap_has_exclusive_gets, bool, S_IRUGO);
 #endif
-module_param(disable_frontswap_ignore_nonactive, int, S_IRUGO);
+module_param(disable_frontswap_ignore_nonactive, bool, S_IRUGO);
 module_param(zcache_comp_name, charp, S_IRUGO);
 module_init(zcache_init);
 MODULE_LICENSE("GPL");
-- 
1.7.7.6

[PATCH 01/11] zcache2: s/int/bool/ on the various options.

[Konrad Rzeszutek Wilk]

There are so many, but this allows us to at least have them
right in as bool.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |   46 ++++++++++++++++----------------
 1 files changed, 23 insertions(+), 23 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 42a9d81..5c0c7db 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -30,11 +30,11 @@
 #include "zbud.h"
 #include "ramster.h"
 #ifdef CONFIG_RAMSTER
-static int ramster_enabled;
-static int disable_frontswap_selfshrink;
+static bool ramster_enabled __read_mostly;
+static bool disable_frontswap_selfshrink __read_mostly;
 #else
-#define ramster_enabled 0
-#define disable_frontswap_selfshrink 0
+#define ramster_enabled false
+#define disable_frontswap_selfshrink false
 #endif
 
 #ifndef __PG_WAS_ACTIVE
@@ -57,11 +57,11 @@ static inline void frontswap_tmem_exclusive_gets(bool b)
 }
 #endif
 
-static int zcache_enabled __read_mostly;
-static int disable_cleancache __read_mostly;
-static int disable_frontswap __read_mostly;
-static int disable_frontswap_ignore_nonactive __read_mostly;
-static int disable_cleancache_ignore_nonactive __read_mostly;
+static bool zcache_enabled __read_mostly;
+static bool disable_cleancache __read_mostly;
+static bool disable_frontswap __read_mostly;
+static bool disable_frontswap_ignore_nonactive __read_mostly;
+static bool disable_cleancache_ignore_nonactive __read_mostly;
 static char *namestr __read_mostly = "zcache";
 
 #define ZCACHE_GFP_MASK \
@@ -1649,16 +1649,16 @@ struct frontswap_ops zcache_frontswap_register_ops(void)
 #ifndef CONFIG_ZCACHE2_MODULE
 static int __init enable_zcache(char *s)
 {
-	zcache_enabled = 1;
+	zcache_enabled = true;
 	return 1;
 }
 __setup("zcache", enable_zcache);
 
 static int __init enable_ramster(char *s)
 {
-	zcache_enabled = 1;
+	zcache_enabled = true;
 #ifdef CONFIG_RAMSTER
-	ramster_enabled = 1;
+	ramster_enabled = true;
 #endif
 	return 1;
 }
@@ -1668,7 +1668,7 @@ __setup("ramster", enable_ramster);
 
 static int __init no_cleancache(char *s)
 {
-	disable_cleancache = 1;
+	disable_cleancache = true;
 	return 1;
 }
 
@@ -1676,7 +1676,7 @@ __setup("nocleancache", no_cleancache);
 
 static int __init no_frontswap(char *s)
 {
-	disable_frontswap = 1;
+	disable_frontswap = true;
 	return 1;
 }
 
@@ -1692,7 +1692,7 @@ __setup("nofrontswapexclusivegets", no_frontswap_exclusive_gets);
 
 static int __init no_frontswap_ignore_nonactive(char *s)
 {
-	disable_frontswap_ignore_nonactive = 1;
+	disable_frontswap_ignore_nonactive = true;
 	return 1;
 }
 
@@ -1700,7 +1700,7 @@ __setup("nofrontswapignorenonactive", no_frontswap_ignore_nonactive);
 
 static int __init no_cleancache_ignore_nonactive(char *s)
 {
-	disable_cleancache_ignore_nonactive = 1;
+	disable_cleancache_ignore_nonactive = true;
 	return 1;
 }
 
@@ -1709,7 +1709,7 @@ __setup("nocleancacheignorenonactive", no_cleancache_ignore_nonactive);
 static int __init enable_zcache_compressor(char *s)
 {
 	strncpy(zcache_comp_name, s, ZCACHE_COMP_NAME_SZ);
-	zcache_enabled = 1;
+	zcache_enabled = true;
 	return 1;
 }
 __setup("zcache=", enable_zcache_compressor);
@@ -1759,7 +1759,7 @@ static int zcache_init(void)
 	int ret = 0;
 
 #ifdef CONFIG_ZCACHE2_MODULE
-	zcache_enabled = 1;
+	zcache_enabled = true;
 #endif
 	if (ramster_enabled) {
 		namestr = "ramster";
@@ -1840,15 +1840,15 @@ out:
 
 #ifdef CONFIG_ZCACHE2_MODULE
 #ifdef CONFIG_RAMSTER
-module_param(ramster_enabled, int, S_IRUGO);
-module_param(disable_frontswap_selfshrink, int, S_IRUGO);
+module_param(ramster_enabled, bool, S_IRUGO);
+module_param(disable_frontswap_selfshrink, bool, S_IRUGO);
 #endif
-module_param(disable_cleancache, int, S_IRUGO);
-module_param(disable_frontswap, int, S_IRUGO);
+module_param(disable_cleancache, bool, S_IRUGO);
+module_param(disable_frontswap, bool, S_IRUGO);
 #ifdef FRONTSWAP_HAS_EXCLUSIVE_GETS
 module_param(frontswap_has_exclusive_gets, bool, S_IRUGO);
 #endif
-module_param(disable_frontswap_ignore_nonactive, int, S_IRUGO);
+module_param(disable_frontswap_ignore_nonactive, bool, S_IRUGO);
 module_param(zcache_comp_name, charp, S_IRUGO);
 module_init(zcache_init);
 MODULE_LICENSE("GPL");
-- 
1.7.7.6

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[PATCH 02/11] zcache: Module license is defined twice.

[Konrad Rzeszutek Wilk]

The other (same license) is at the end of the file.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 5c0c7db..2b9ad55 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -67,8 +67,6 @@ static char *namestr __read_mostly = "zcache";
 #define ZCACHE_GFP_MASK \
 	(__GFP_FS | __GFP_NORETRY | __GFP_NOWARN | __GFP_NOMEMALLOC)
 
-MODULE_LICENSE("GPL");
-
 /* crypto API for zcache  */
 #ifdef CONFIG_ZCACHE2_MODULE
 static char *zcache_comp_name = "lzo";
-- 
1.7.7.6

[PATCH 02/11] zcache: Module license is defined twice.

[Konrad Rzeszutek Wilk]

The other (same license) is at the end of the file.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |    2 --
 1 files changed, 0 insertions(+), 2 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 5c0c7db..2b9ad55 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -67,8 +67,6 @@ static char *namestr __read_mostly = "zcache";
 #define ZCACHE_GFP_MASK \
 	(__GFP_FS | __GFP_NORETRY | __GFP_NOWARN | __GFP_NOMEMALLOC)
 
-MODULE_LICENSE("GPL");
-
 /* crypto API for zcache  */
 #ifdef CONFIG_ZCACHE2_MODULE
 static char *zcache_comp_name = "lzo";
-- 
1.7.7.6

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[PATCH 03/11] zcache: Provide accessory functions for counter increase

[Konrad Rzeszutek Wilk]

This is the first step in moving the debugfs code out of the
main file in-to another file. And also allow the code to run
without CONFIG_DEBUG_FS defined.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |  103 ++++++++++++++++++++++-----------
 1 files changed, 68 insertions(+), 35 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 2b9ad55..6fd7f0e 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -135,32 +135,88 @@ static DEFINE_PER_CPU(struct zcache_preload, zcache_preloads) = { 0, };
 static long zcache_obj_count;
 static atomic_t zcache_obj_atomic = ATOMIC_INIT(0);
 static long zcache_obj_count_max;
+static inline void inc_zcache_obj_count(void)
+{
+	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
+	if (zcache_obj_count > zcache_obj_count_max)
+		zcache_obj_count_max = zcache_obj_count;
+}
+
 static long zcache_objnode_count;
 static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
 static long zcache_objnode_count_max;
+static inline void inc_zcache_objnode_count(void)
+{
+	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
+	if (zcache_objnode_count > zcache_objnode_count_max)
+		zcache_objnode_count_max = zcache_objnode_count;
+};
 static u64 zcache_eph_zbytes;
 static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0);
 static u64 zcache_eph_zbytes_max;
+static inline void inc_zcache_eph_zbytes(unsigned clen)
+{
+	zcache_eph_zbytes = atomic_long_add_return(clen, &zcache_eph_zbytes_atomic);
+	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
+		zcache_eph_zbytes_max = zcache_eph_zbytes;
+};
 static u64 zcache_pers_zbytes;
 static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0);
 static u64 zcache_pers_zbytes_max;
+static inline void inc_zcache_pers_zbytes(unsigned clen)
+{
+	zcache_pers_zbytes = atomic_long_add_return(clen, &zcache_pers_zbytes_atomic);
+	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
+		zcache_pers_zbytes_max = zcache_pers_zbytes;
+}
 static long zcache_eph_pageframes;
 static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
 static long zcache_eph_pageframes_max;
+static inline void inc_zcache_eph_pageframes(void)
+{
+	zcache_eph_pageframes = atomic_inc_return(&zcache_eph_pageframes_atomic);
+	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
+		zcache_eph_pageframes_max = zcache_eph_pageframes;
+};
 static long zcache_pers_pageframes;
 static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
 static long zcache_pers_pageframes_max;
+static inline void inc_zcache_pers_pageframes(void)
+{
+	zcache_pers_pageframes = atomic_inc_return(&zcache_pers_pageframes_atomic);
+	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
+		zcache_pers_pageframes_max = zcache_pers_pageframes;
+}
 static long zcache_pageframes_alloced;
 static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
+static inline void inc_zcache_pageframes_alloced(void)
+{
+	zcache_pageframes_alloced = atomic_inc_return(&zcache_pageframes_alloced_atomic);
+};
 static long zcache_pageframes_freed;
 static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
+static inline void inc_zcache_pageframes_freed(void)
+{
+	zcache_pageframes_freed = atomic_inc_return(&zcache_pageframes_freed_atomic);
+}
 static long zcache_eph_zpages;
 static atomic_t zcache_eph_zpages_atomic = ATOMIC_INIT(0);
 static long zcache_eph_zpages_max;
+static inline void inc_zcache_eph_zpages(void)
+{
+	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
+	if (zcache_eph_zpages > zcache_eph_zpages_max)
+		zcache_eph_zpages_max = zcache_eph_zpages;
+}
 static long zcache_pers_zpages;
 static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
 static long zcache_pers_zpages_max;
-
+static inline void inc_zcache_pers_zpages(void)
+{
+	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
+	if (zcache_pers_zpages > zcache_pers_zpages_max)
+		zcache_pers_zpages_max = zcache_pers_zpages;
+}
 /* but for the rest of these, counting races are ok */
 static unsigned long zcache_flush_total;
 static unsigned long zcache_flush_found;
@@ -398,9 +454,7 @@ static struct tmem_objnode *zcache_objnode_alloc(struct tmem_pool *pool)
 		}
 	}
 	BUG_ON(objnode == NULL);
-	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
-	if (zcache_objnode_count > zcache_objnode_count_max)
-		zcache_objnode_count_max = zcache_objnode_count;
+	inc_zcache_objnode_count();
 	return objnode;
 }
 
@@ -422,9 +476,7 @@ static struct tmem_obj *zcache_obj_alloc(struct tmem_pool *pool)
 	obj = kp->obj;
 	BUG_ON(obj == NULL);
 	kp->obj = NULL;
-	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
-	if (zcache_obj_count > zcache_obj_count_max)
-		zcache_obj_count_max = zcache_obj_count;
+	inc_zcache_obj_count();
 	return obj;
 }
 
@@ -448,16 +500,14 @@ static struct page *zcache_alloc_page(void)
 	struct page *page = alloc_page(ZCACHE_GFP_MASK);
 
 	if (page != NULL)
-		zcache_pageframes_alloced =
-			atomic_inc_return(&zcache_pageframes_alloced_atomic);
+		inc_zcache_pageframes_alloced();
 	return page;
 }
 
 #ifdef FRONTSWAP_HAS_UNUSE
 static void zcache_unacct_page(void)
 {
-	zcache_pageframes_freed =
-		atomic_inc_return(&zcache_pageframes_freed_atomic);
+	inc_zcache_pageframes_freed();
 }
 #endif
 
@@ -469,8 +519,7 @@ static void zcache_free_page(struct page *page)
 	if (page == NULL)
 		BUG();
 	__free_page(page);
-	zcache_pageframes_freed =
-		atomic_inc_return(&zcache_pageframes_freed_atomic);
+	inc_zcache_pageframes_freed();
 	curr_pageframes = zcache_pageframes_alloced -
 			atomic_read(&zcache_pageframes_freed_atomic) -
 			atomic_read(&zcache_eph_pageframes_atomic) -
@@ -535,19 +584,11 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw,
 create_in_new_page:
 	pampd = (void *)zbud_create_prep(th, true, cdata, clen, newpage);
 	BUG_ON(pampd == NULL);
-	zcache_eph_pageframes =
-		atomic_inc_return(&zcache_eph_pageframes_atomic);
-	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
-		zcache_eph_pageframes_max = zcache_eph_pageframes;
+	inc_zcache_eph_pageframes();
 
 got_pampd:
-	zcache_eph_zbytes =
-		atomic_long_add_return(clen, &zcache_eph_zbytes_atomic);
-	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
-		zcache_eph_zbytes_max = zcache_eph_zbytes;
-	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
-	if (zcache_eph_zpages > zcache_eph_zpages_max)
-		zcache_eph_zpages_max = zcache_eph_zpages;
+	inc_zcache_eph_zbytes(clen);
+	inc_zcache_eph_zpages();
 	if (ramster_enabled && raw)
 		ramster_count_foreign_pages(true, 1);
 out:
@@ -617,19 +658,11 @@ create_pampd:
 create_in_new_page:
 	pampd = (void *)zbud_create_prep(th, false, cdata, clen, newpage);
 	BUG_ON(pampd == NULL);
-	zcache_pers_pageframes =
-		atomic_inc_return(&zcache_pers_pageframes_atomic);
-	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
-		zcache_pers_pageframes_max = zcache_pers_pageframes;
+	inc_zcache_pers_pageframes();
 
 got_pampd:
-	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
-	if (zcache_pers_zpages > zcache_pers_zpages_max)
-		zcache_pers_zpages_max = zcache_pers_zpages;
-	zcache_pers_zbytes =
-		atomic_long_add_return(clen, &zcache_pers_zbytes_atomic);
-	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
-		zcache_pers_zbytes_max = zcache_pers_zbytes;
+	inc_zcache_pers_zpages();
+	inc_zcache_pers_zbytes(clen);
 	if (ramster_enabled && raw)
 		ramster_count_foreign_pages(false, 1);
 out:
-- 
1.7.7.6

[PATCH 03/11] zcache: Provide accessory functions for counter increase

[Konrad Rzeszutek Wilk]

This is the first step in moving the debugfs code out of the
main file in-to another file. And also allow the code to run
without CONFIG_DEBUG_FS defined.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |  103 ++++++++++++++++++++++-----------
 1 files changed, 68 insertions(+), 35 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 2b9ad55..6fd7f0e 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -135,32 +135,88 @@ static DEFINE_PER_CPU(struct zcache_preload, zcache_preloads) = { 0, };
 static long zcache_obj_count;
 static atomic_t zcache_obj_atomic = ATOMIC_INIT(0);
 static long zcache_obj_count_max;
+static inline void inc_zcache_obj_count(void)
+{
+	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
+	if (zcache_obj_count > zcache_obj_count_max)
+		zcache_obj_count_max = zcache_obj_count;
+}
+
 static long zcache_objnode_count;
 static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
 static long zcache_objnode_count_max;
+static inline void inc_zcache_objnode_count(void)
+{
+	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
+	if (zcache_objnode_count > zcache_objnode_count_max)
+		zcache_objnode_count_max = zcache_objnode_count;
+};
 static u64 zcache_eph_zbytes;
 static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0);
 static u64 zcache_eph_zbytes_max;
+static inline void inc_zcache_eph_zbytes(unsigned clen)
+{
+	zcache_eph_zbytes = atomic_long_add_return(clen, &zcache_eph_zbytes_atomic);
+	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
+		zcache_eph_zbytes_max = zcache_eph_zbytes;
+};
 static u64 zcache_pers_zbytes;
 static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0);
 static u64 zcache_pers_zbytes_max;
+static inline void inc_zcache_pers_zbytes(unsigned clen)
+{
+	zcache_pers_zbytes = atomic_long_add_return(clen, &zcache_pers_zbytes_atomic);
+	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
+		zcache_pers_zbytes_max = zcache_pers_zbytes;
+}
 static long zcache_eph_pageframes;
 static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
 static long zcache_eph_pageframes_max;
+static inline void inc_zcache_eph_pageframes(void)
+{
+	zcache_eph_pageframes = atomic_inc_return(&zcache_eph_pageframes_atomic);
+	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
+		zcache_eph_pageframes_max = zcache_eph_pageframes;
+};
 static long zcache_pers_pageframes;
 static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
 static long zcache_pers_pageframes_max;
+static inline void inc_zcache_pers_pageframes(void)
+{
+	zcache_pers_pageframes = atomic_inc_return(&zcache_pers_pageframes_atomic);
+	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
+		zcache_pers_pageframes_max = zcache_pers_pageframes;
+}
 static long zcache_pageframes_alloced;
 static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
+static inline void inc_zcache_pageframes_alloced(void)
+{
+	zcache_pageframes_alloced = atomic_inc_return(&zcache_pageframes_alloced_atomic);
+};
 static long zcache_pageframes_freed;
 static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
+static inline void inc_zcache_pageframes_freed(void)
+{
+	zcache_pageframes_freed = atomic_inc_return(&zcache_pageframes_freed_atomic);
+}
 static long zcache_eph_zpages;
 static atomic_t zcache_eph_zpages_atomic = ATOMIC_INIT(0);
 static long zcache_eph_zpages_max;
+static inline void inc_zcache_eph_zpages(void)
+{
+	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
+	if (zcache_eph_zpages > zcache_eph_zpages_max)
+		zcache_eph_zpages_max = zcache_eph_zpages;
+}
 static long zcache_pers_zpages;
 static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
 static long zcache_pers_zpages_max;
-
+static inline void inc_zcache_pers_zpages(void)
+{
+	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
+	if (zcache_pers_zpages > zcache_pers_zpages_max)
+		zcache_pers_zpages_max = zcache_pers_zpages;
+}
 /* but for the rest of these, counting races are ok */
 static unsigned long zcache_flush_total;
 static unsigned long zcache_flush_found;
@@ -398,9 +454,7 @@ static struct tmem_objnode *zcache_objnode_alloc(struct tmem_pool *pool)
 		}
 	}
 	BUG_ON(objnode == NULL);
-	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
-	if (zcache_objnode_count > zcache_objnode_count_max)
-		zcache_objnode_count_max = zcache_objnode_count;
+	inc_zcache_objnode_count();
 	return objnode;
 }
 
@@ -422,9 +476,7 @@ static struct tmem_obj *zcache_obj_alloc(struct tmem_pool *pool)
 	obj = kp->obj;
 	BUG_ON(obj == NULL);
 	kp->obj = NULL;
-	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
-	if (zcache_obj_count > zcache_obj_count_max)
-		zcache_obj_count_max = zcache_obj_count;
+	inc_zcache_obj_count();
 	return obj;
 }
 
@@ -448,16 +500,14 @@ static struct page *zcache_alloc_page(void)
 	struct page *page = alloc_page(ZCACHE_GFP_MASK);
 
 	if (page != NULL)
-		zcache_pageframes_alloced =
-			atomic_inc_return(&zcache_pageframes_alloced_atomic);
+		inc_zcache_pageframes_alloced();
 	return page;
 }
 
 #ifdef FRONTSWAP_HAS_UNUSE
 static void zcache_unacct_page(void)
 {
-	zcache_pageframes_freed =
-		atomic_inc_return(&zcache_pageframes_freed_atomic);
+	inc_zcache_pageframes_freed();
 }
 #endif
 
@@ -469,8 +519,7 @@ static void zcache_free_page(struct page *page)
 	if (page == NULL)
 		BUG();
 	__free_page(page);
-	zcache_pageframes_freed =
-		atomic_inc_return(&zcache_pageframes_freed_atomic);
+	inc_zcache_pageframes_freed();
 	curr_pageframes = zcache_pageframes_alloced -
 			atomic_read(&zcache_pageframes_freed_atomic) -
 			atomic_read(&zcache_eph_pageframes_atomic) -
@@ -535,19 +584,11 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw,
 create_in_new_page:
 	pampd = (void *)zbud_create_prep(th, true, cdata, clen, newpage);
 	BUG_ON(pampd == NULL);
-	zcache_eph_pageframes =
-		atomic_inc_return(&zcache_eph_pageframes_atomic);
-	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
-		zcache_eph_pageframes_max = zcache_eph_pageframes;
+	inc_zcache_eph_pageframes();
 
 got_pampd:
-	zcache_eph_zbytes =
-		atomic_long_add_return(clen, &zcache_eph_zbytes_atomic);
-	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
-		zcache_eph_zbytes_max = zcache_eph_zbytes;
-	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
-	if (zcache_eph_zpages > zcache_eph_zpages_max)
-		zcache_eph_zpages_max = zcache_eph_zpages;
+	inc_zcache_eph_zbytes(clen);
+	inc_zcache_eph_zpages();
 	if (ramster_enabled && raw)
 		ramster_count_foreign_pages(true, 1);
 out:
@@ -617,19 +658,11 @@ create_pampd:
 create_in_new_page:
 	pampd = (void *)zbud_create_prep(th, false, cdata, clen, newpage);
 	BUG_ON(pampd == NULL);
-	zcache_pers_pageframes =
-		atomic_inc_return(&zcache_pers_pageframes_atomic);
-	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
-		zcache_pers_pageframes_max = zcache_pers_pageframes;
+	inc_zcache_pers_pageframes();
 
 got_pampd:
-	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
-	if (zcache_pers_zpages > zcache_pers_zpages_max)
-		zcache_pers_zpages_max = zcache_pers_zpages;
-	zcache_pers_zbytes =
-		atomic_long_add_return(clen, &zcache_pers_zbytes_atomic);
-	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
-		zcache_pers_zbytes_max = zcache_pers_zbytes;
+	inc_zcache_pers_zpages();
+	inc_zcache_pers_zbytes(clen);
 	if (ramster_enabled && raw)
 		ramster_count_foreign_pages(false, 1);
 out:
-- 
1.7.7.6

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[PATCH 04/11] zcache: Provide accessory functions for counter decrease.

[Konrad Rzeszutek Wilk]

This way we can have all wrapped with these functions and
can disable/enable this with CONFIG_DEBUG_FS.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |   88 +++++++++++++++++++--------------
 1 files changed, 51 insertions(+), 37 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 6fd7f0e..29ffbf1 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -141,8 +141,12 @@ static inline void inc_zcache_obj_count(void)
 	if (zcache_obj_count > zcache_obj_count_max)
 		zcache_obj_count_max = zcache_obj_count;
 }
-
 static long zcache_objnode_count;
+static inline void dec_zcache_obj_count(void)
+{
+	zcache_obj_count = atomic_dec_return(&zcache_obj_atomic);
+	BUG_ON(zcache_obj_count < 0);
+};
 static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
 static long zcache_objnode_count_max;
 static inline void inc_zcache_objnode_count(void)
@@ -151,6 +155,11 @@ static inline void inc_zcache_objnode_count(void)
 	if (zcache_objnode_count > zcache_objnode_count_max)
 		zcache_objnode_count_max = zcache_objnode_count;
 };
+static inline void dec_zcache_objnode_count(void)
+{
+	zcache_objnode_count = atomic_dec_return(&zcache_objnode_atomic);
+	BUG_ON(zcache_objnode_count < 0);
+};
 static u64 zcache_eph_zbytes;
 static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0);
 static u64 zcache_eph_zbytes_max;
@@ -160,6 +169,10 @@ static inline void inc_zcache_eph_zbytes(unsigned clen)
 	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
 		zcache_eph_zbytes_max = zcache_eph_zbytes;
 };
+static inline void dec_zcache_eph_zbytes(unsigned zsize)
+{
+	zcache_eph_zbytes = atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
+};
 static u64 zcache_pers_zbytes;
 static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0);
 static u64 zcache_pers_zbytes_max;
@@ -170,6 +183,10 @@ static inline void inc_zcache_pers_zbytes(unsigned clen)
 		zcache_pers_zbytes_max = zcache_pers_zbytes;
 }
 static long zcache_eph_pageframes;
+static inline void dec_zcache_pers_zbytes(unsigned zsize)
+{
+	zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
+}
 static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
 static long zcache_eph_pageframes_max;
 static inline void inc_zcache_eph_pageframes(void)
@@ -179,6 +196,10 @@ static inline void inc_zcache_eph_pageframes(void)
 		zcache_eph_pageframes_max = zcache_eph_pageframes;
 };
 static long zcache_pers_pageframes;
+static inline void dec_zcache_eph_pageframes(void)
+{
+	zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic);
+};
 static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
 static long zcache_pers_pageframes_max;
 static inline void inc_zcache_pers_pageframes(void)
@@ -188,6 +209,10 @@ static inline void inc_zcache_pers_pageframes(void)
 		zcache_pers_pageframes_max = zcache_pers_pageframes;
 }
 static long zcache_pageframes_alloced;
+static inline void dec_zcache_pers_pageframes(void)
+{
+	zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic);
+}
 static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
 static inline void inc_zcache_pageframes_alloced(void)
 {
@@ -209,6 +234,10 @@ static inline void inc_zcache_eph_zpages(void)
 		zcache_eph_zpages_max = zcache_eph_zpages;
 }
 static long zcache_pers_zpages;
+static inline void dec_zcache_eph_zpages(unsigned zpages)
+{
+	zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
+}
 static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
 static long zcache_pers_zpages_max;
 static inline void inc_zcache_pers_zpages(void)
@@ -217,6 +246,10 @@ static inline void inc_zcache_pers_zpages(void)
 	if (zcache_pers_zpages > zcache_pers_zpages_max)
 		zcache_pers_zpages_max = zcache_pers_zpages;
 }
+static inline void dec_zcache_pers_zpages(unsigned zpages)
+{
+	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
+}
 /* but for the rest of these, counting races are ok */
 static unsigned long zcache_flush_total;
 static unsigned long zcache_flush_found;
@@ -461,9 +494,7 @@ static struct tmem_objnode *zcache_objnode_alloc(struct tmem_pool *pool)
 static void zcache_objnode_free(struct tmem_objnode *objnode,
 					struct tmem_pool *pool)
 {
-	zcache_objnode_count =
-		atomic_dec_return(&zcache_objnode_atomic);
-	BUG_ON(zcache_objnode_count < 0);
+	dec_zcache_objnode_count();
 	kmem_cache_free(zcache_objnode_cache, objnode);
 }
 
@@ -482,9 +513,7 @@ static struct tmem_obj *zcache_obj_alloc(struct tmem_pool *pool)
 
 static void zcache_obj_free(struct tmem_obj *obj, struct tmem_pool *pool)
 {
-	zcache_obj_count =
-		atomic_dec_return(&zcache_obj_atomic);
-	BUG_ON(zcache_obj_count < 0);
+	dec_zcache_obj_count();
 	kmem_cache_free(zcache_obj_cache, obj);
 }
 
@@ -811,20 +840,14 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *sizep, bool raw,
 					&zsize, &zpages);
 	if (eph) {
 		if (page)
-			zcache_eph_pageframes =
-			    atomic_dec_return(&zcache_eph_pageframes_atomic);
-		zcache_eph_zpages =
-		    atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
-		zcache_eph_zbytes =
-		    atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
+			dec_zcache_eph_pageframes();
+		dec_zcache_eph_zpages(zpages);
+		dec_zcache_eph_zbytes(zsize);
 	} else {
 		if (page)
-			zcache_pers_pageframes =
-			    atomic_dec_return(&zcache_pers_pageframes_atomic);
-		zcache_pers_zpages =
-		    atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
-		zcache_pers_zbytes =
-		    atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
+			dec_zcache_pers_pageframes();
+		dec_zcache_pers_zpages(zpages);
+		dec_zcache_pers_zbytes(zsize);
 	}
 	if (!is_local_client(pool->client))
 		ramster_count_foreign_pages(eph, -1);
@@ -854,23 +877,17 @@ static void zcache_pampd_free(void *pampd, struct tmem_pool *pool,
 		page = zbud_free_and_delist((struct zbudref *)pampd,
 						true, &zsize, &zpages);
 		if (page)
-			zcache_eph_pageframes =
-			    atomic_dec_return(&zcache_eph_pageframes_atomic);
-		zcache_eph_zpages =
-		    atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
-		zcache_eph_zbytes =
-		    atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
+			dec_zcache_eph_pageframes();
+		dec_zcache_eph_zpages(zpages);
+		dec_zcache_eph_zbytes(zsize);
 		/* FIXME CONFIG_RAMSTER... check acct parameter? */
 	} else {
 		page = zbud_free_and_delist((struct zbudref *)pampd,
 						false, &zsize, &zpages);
 		if (page)
-			zcache_pers_pageframes =
-			    atomic_dec_return(&zcache_pers_pageframes_atomic);
-		zcache_pers_zpages =
-		     atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
-		zcache_pers_zbytes =
-		    atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
+			dec_zcache_pers_pageframes();
+		dec_zcache_pers_zpages(zpages);
+		dec_zcache_pers_zbytes(zsize);
 	}
 	if (!is_local_client(pool->client))
 		ramster_count_foreign_pages(is_ephemeral(pool), -1);
@@ -992,13 +1009,10 @@ static struct page *zcache_evict_eph_pageframe(void)
 	page = zbud_evict_pageframe_lru(&zsize, &zpages);
 	if (page == NULL)
 		goto out;
-	zcache_eph_zbytes = atomic_long_sub_return(zsize,
-					&zcache_eph_zbytes_atomic);
-	zcache_eph_zpages = atomic_sub_return(zpages,
-					&zcache_eph_zpages_atomic);
+	dec_zcache_eph_zbytes(zsize);
+	dec_zcache_eph_zpages(zpages);
 	zcache_evicted_eph_zpages++;
-	zcache_eph_pageframes =
-		atomic_dec_return(&zcache_eph_pageframes_atomic);
+	dec_zcache_eph_pageframes();
 	zcache_evicted_eph_pageframes++;
 out:
 	return page;
-- 
1.7.7.6

[PATCH 04/11] zcache: Provide accessory functions for counter decrease.

[Konrad Rzeszutek Wilk]

This way we can have all wrapped with these functions and
can disable/enable this with CONFIG_DEBUG_FS.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |   88 +++++++++++++++++++--------------
 1 files changed, 51 insertions(+), 37 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 6fd7f0e..29ffbf1 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -141,8 +141,12 @@ static inline void inc_zcache_obj_count(void)
 	if (zcache_obj_count > zcache_obj_count_max)
 		zcache_obj_count_max = zcache_obj_count;
 }
-
 static long zcache_objnode_count;
+static inline void dec_zcache_obj_count(void)
+{
+	zcache_obj_count = atomic_dec_return(&zcache_obj_atomic);
+	BUG_ON(zcache_obj_count < 0);
+};
 static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
 static long zcache_objnode_count_max;
 static inline void inc_zcache_objnode_count(void)
@@ -151,6 +155,11 @@ static inline void inc_zcache_objnode_count(void)
 	if (zcache_objnode_count > zcache_objnode_count_max)
 		zcache_objnode_count_max = zcache_objnode_count;
 };
+static inline void dec_zcache_objnode_count(void)
+{
+	zcache_objnode_count = atomic_dec_return(&zcache_objnode_atomic);
+	BUG_ON(zcache_objnode_count < 0);
+};
 static u64 zcache_eph_zbytes;
 static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0);
 static u64 zcache_eph_zbytes_max;
@@ -160,6 +169,10 @@ static inline void inc_zcache_eph_zbytes(unsigned clen)
 	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
 		zcache_eph_zbytes_max = zcache_eph_zbytes;
 };
+static inline void dec_zcache_eph_zbytes(unsigned zsize)
+{
+	zcache_eph_zbytes = atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
+};
 static u64 zcache_pers_zbytes;
 static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0);
 static u64 zcache_pers_zbytes_max;
@@ -170,6 +183,10 @@ static inline void inc_zcache_pers_zbytes(unsigned clen)
 		zcache_pers_zbytes_max = zcache_pers_zbytes;
 }
 static long zcache_eph_pageframes;
+static inline void dec_zcache_pers_zbytes(unsigned zsize)
+{
+	zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
+}
 static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
 static long zcache_eph_pageframes_max;
 static inline void inc_zcache_eph_pageframes(void)
@@ -179,6 +196,10 @@ static inline void inc_zcache_eph_pageframes(void)
 		zcache_eph_pageframes_max = zcache_eph_pageframes;
 };
 static long zcache_pers_pageframes;
+static inline void dec_zcache_eph_pageframes(void)
+{
+	zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic);
+};
 static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
 static long zcache_pers_pageframes_max;
 static inline void inc_zcache_pers_pageframes(void)
@@ -188,6 +209,10 @@ static inline void inc_zcache_pers_pageframes(void)
 		zcache_pers_pageframes_max = zcache_pers_pageframes;
 }
 static long zcache_pageframes_alloced;
+static inline void dec_zcache_pers_pageframes(void)
+{
+	zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic);
+}
 static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
 static inline void inc_zcache_pageframes_alloced(void)
 {
@@ -209,6 +234,10 @@ static inline void inc_zcache_eph_zpages(void)
 		zcache_eph_zpages_max = zcache_eph_zpages;
 }
 static long zcache_pers_zpages;
+static inline void dec_zcache_eph_zpages(unsigned zpages)
+{
+	zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
+}
 static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
 static long zcache_pers_zpages_max;
 static inline void inc_zcache_pers_zpages(void)
@@ -217,6 +246,10 @@ static inline void inc_zcache_pers_zpages(void)
 	if (zcache_pers_zpages > zcache_pers_zpages_max)
 		zcache_pers_zpages_max = zcache_pers_zpages;
 }
+static inline void dec_zcache_pers_zpages(unsigned zpages)
+{
+	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
+}
 /* but for the rest of these, counting races are ok */
 static unsigned long zcache_flush_total;
 static unsigned long zcache_flush_found;
@@ -461,9 +494,7 @@ static struct tmem_objnode *zcache_objnode_alloc(struct tmem_pool *pool)
 static void zcache_objnode_free(struct tmem_objnode *objnode,
 					struct tmem_pool *pool)
 {
-	zcache_objnode_count =
-		atomic_dec_return(&zcache_objnode_atomic);
-	BUG_ON(zcache_objnode_count < 0);
+	dec_zcache_objnode_count();
 	kmem_cache_free(zcache_objnode_cache, objnode);
 }
 
@@ -482,9 +513,7 @@ static struct tmem_obj *zcache_obj_alloc(struct tmem_pool *pool)
 
 static void zcache_obj_free(struct tmem_obj *obj, struct tmem_pool *pool)
 {
-	zcache_obj_count =
-		atomic_dec_return(&zcache_obj_atomic);
-	BUG_ON(zcache_obj_count < 0);
+	dec_zcache_obj_count();
 	kmem_cache_free(zcache_obj_cache, obj);
 }
 
@@ -811,20 +840,14 @@ static int zcache_pampd_get_data_and_free(char *data, size_t *sizep, bool raw,
 					&zsize, &zpages);
 	if (eph) {
 		if (page)
-			zcache_eph_pageframes =
-			    atomic_dec_return(&zcache_eph_pageframes_atomic);
-		zcache_eph_zpages =
-		    atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
-		zcache_eph_zbytes =
-		    atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
+			dec_zcache_eph_pageframes();
+		dec_zcache_eph_zpages(zpages);
+		dec_zcache_eph_zbytes(zsize);
 	} else {
 		if (page)
-			zcache_pers_pageframes =
-			    atomic_dec_return(&zcache_pers_pageframes_atomic);
-		zcache_pers_zpages =
-		    atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
-		zcache_pers_zbytes =
-		    atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
+			dec_zcache_pers_pageframes();
+		dec_zcache_pers_zpages(zpages);
+		dec_zcache_pers_zbytes(zsize);
 	}
 	if (!is_local_client(pool->client))
 		ramster_count_foreign_pages(eph, -1);
@@ -854,23 +877,17 @@ static void zcache_pampd_free(void *pampd, struct tmem_pool *pool,
 		page = zbud_free_and_delist((struct zbudref *)pampd,
 						true, &zsize, &zpages);
 		if (page)
-			zcache_eph_pageframes =
-			    atomic_dec_return(&zcache_eph_pageframes_atomic);
-		zcache_eph_zpages =
-		    atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
-		zcache_eph_zbytes =
-		    atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
+			dec_zcache_eph_pageframes();
+		dec_zcache_eph_zpages(zpages);
+		dec_zcache_eph_zbytes(zsize);
 		/* FIXME CONFIG_RAMSTER... check acct parameter? */
 	} else {
 		page = zbud_free_and_delist((struct zbudref *)pampd,
 						false, &zsize, &zpages);
 		if (page)
-			zcache_pers_pageframes =
-			    atomic_dec_return(&zcache_pers_pageframes_atomic);
-		zcache_pers_zpages =
-		     atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
-		zcache_pers_zbytes =
-		    atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
+			dec_zcache_pers_pageframes();
+		dec_zcache_pers_zpages(zpages);
+		dec_zcache_pers_zbytes(zsize);
 	}
 	if (!is_local_client(pool->client))
 		ramster_count_foreign_pages(is_ephemeral(pool), -1);
@@ -992,13 +1009,10 @@ static struct page *zcache_evict_eph_pageframe(void)
 	page = zbud_evict_pageframe_lru(&zsize, &zpages);
 	if (page == NULL)
 		goto out;
-	zcache_eph_zbytes = atomic_long_sub_return(zsize,
-					&zcache_eph_zbytes_atomic);
-	zcache_eph_zpages = atomic_sub_return(zpages,
-					&zcache_eph_zpages_atomic);
+	dec_zcache_eph_zbytes(zsize);
+	dec_zcache_eph_zpages(zpages);
 	zcache_evicted_eph_zpages++;
-	zcache_eph_pageframes =
-		atomic_dec_return(&zcache_eph_pageframes_atomic);
+	dec_zcache_eph_pageframes();
 	zcache_evicted_eph_pageframes++;
 out:
 	return page;
-- 
1.7.7.6

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[PATCH 05/11] zcache: The last of the atomic reads has now an accessory function.

[Konrad Rzeszutek Wilk]

And now we can move the code to its own file.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 29ffbf1..3402acc 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -250,6 +250,14 @@ static inline void dec_zcache_pers_zpages(unsigned zpages)
 {
 	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
 }
+
+static inline unsigned long curr_pageframes_count(void)
+{
+	return zcache_pageframes_alloced -
+		atomic_read(&zcache_pageframes_freed_atomic) -
+		atomic_read(&zcache_eph_pageframes_atomic) -
+		atomic_read(&zcache_pers_pageframes_atomic);
+};
 /* but for the rest of these, counting races are ok */
 static unsigned long zcache_flush_total;
 static unsigned long zcache_flush_found;
@@ -549,10 +557,7 @@ static void zcache_free_page(struct page *page)
 		BUG();
 	__free_page(page);
 	inc_zcache_pageframes_freed();
-	curr_pageframes = zcache_pageframes_alloced -
-			atomic_read(&zcache_pageframes_freed_atomic) -
-			atomic_read(&zcache_eph_pageframes_atomic) -
-			atomic_read(&zcache_pers_pageframes_atomic);
+	curr_pageframes = curr_pageframes_count();
 	if (curr_pageframes > max_pageframes)
 		max_pageframes = curr_pageframes;
 	if (curr_pageframes < min_pageframes)
-- 
1.7.7.6

[PATCH 05/11] zcache: The last of the atomic reads has now an accessory function.

[Konrad Rzeszutek Wilk]

And now we can move the code to its own file.
Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |   13 +++++++++----
 1 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 29ffbf1..3402acc 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -250,6 +250,14 @@ static inline void dec_zcache_pers_zpages(unsigned zpages)
 {
 	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
 }
+
+static inline unsigned long curr_pageframes_count(void)
+{
+	return zcache_pageframes_alloced -
+		atomic_read(&zcache_pageframes_freed_atomic) -
+		atomic_read(&zcache_eph_pageframes_atomic) -
+		atomic_read(&zcache_pers_pageframes_atomic);
+};
 /* but for the rest of these, counting races are ok */
 static unsigned long zcache_flush_total;
 static unsigned long zcache_flush_found;
@@ -549,10 +557,7 @@ static void zcache_free_page(struct page *page)
 		BUG();
 	__free_page(page);
 	inc_zcache_pageframes_freed();
-	curr_pageframes = zcache_pageframes_alloced -
-			atomic_read(&zcache_pageframes_freed_atomic) -
-			atomic_read(&zcache_eph_pageframes_atomic) -
-			atomic_read(&zcache_pers_pageframes_atomic);
+	curr_pageframes = curr_pageframes_count();
 	if (curr_pageframes > max_pageframes)
 		max_pageframes = curr_pageframes;
 	if (curr_pageframes < min_pageframes)
-- 
1.7.7.6

--
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[PATCH 06/11] zcache: Fix compile warnings due to usage of debugfs_create_size_t

[Konrad Rzeszutek Wilk]

When we compile we get tons of:
include/linux/debugfs.h:80:16: note: expected ‘size_t *’ but argument is
of type ‘long int *’
drivers/staging/ramster/zcache-main.c:279:2: warning: passing argument 4
of ‘debugfs_create_size_t’ from incompatible pointer type [enabled by d
efault]

which is b/c we end up using 'unsigned' or 'unsigned long' instead
of 'ssize_t'. So lets fix this up and use the proper type.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |  135 +++++++++++++++++----------------
 1 files changed, 68 insertions(+), 67 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 3402acc..1f354f2 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -132,23 +132,23 @@ static struct kmem_cache *zcache_obj_cache;
 static DEFINE_PER_CPU(struct zcache_preload, zcache_preloads) = { 0, };
 
 /* we try to keep these statistics SMP-consistent */
-static long zcache_obj_count;
+static ssize_t zcache_obj_count;
 static atomic_t zcache_obj_atomic = ATOMIC_INIT(0);
-static long zcache_obj_count_max;
+static ssize_t zcache_obj_count_max;
 static inline void inc_zcache_obj_count(void)
 {
 	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
 	if (zcache_obj_count > zcache_obj_count_max)
 		zcache_obj_count_max = zcache_obj_count;
 }
-static long zcache_objnode_count;
+static ssize_t zcache_objnode_count;
 static inline void dec_zcache_obj_count(void)
 {
 	zcache_obj_count = atomic_dec_return(&zcache_obj_atomic);
 	BUG_ON(zcache_obj_count < 0);
 };
 static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
-static long zcache_objnode_count_max;
+static ssize_t zcache_objnode_count_max;
 static inline void inc_zcache_objnode_count(void)
 {
 	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
@@ -182,64 +182,65 @@ static inline void inc_zcache_pers_zbytes(unsigned clen)
 	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
 		zcache_pers_zbytes_max = zcache_pers_zbytes;
 }
-static long zcache_eph_pageframes;
+static ssize_t zcache_eph_pageframes;
 static inline void dec_zcache_pers_zbytes(unsigned zsize)
 {
 	zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
 }
 static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
-static long zcache_eph_pageframes_max;
+static ssize_t zcache_eph_pageframes_max;
 static inline void inc_zcache_eph_pageframes(void)
 {
 	zcache_eph_pageframes = atomic_inc_return(&zcache_eph_pageframes_atomic);
 	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
 		zcache_eph_pageframes_max = zcache_eph_pageframes;
 };
-static long zcache_pers_pageframes;
+static ssize_t zcache_pers_pageframes;
 static inline void dec_zcache_eph_pageframes(void)
 {
 	zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic);
 };
 static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
-static long zcache_pers_pageframes_max;
+static ssize_t zcache_pers_pageframes_max;
 static inline void inc_zcache_pers_pageframes(void)
 {
 	zcache_pers_pageframes = atomic_inc_return(&zcache_pers_pageframes_atomic);
 	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
 		zcache_pers_pageframes_max = zcache_pers_pageframes;
 }
-static long zcache_pageframes_alloced;
+static ssize_t zcache_pageframes_alloced;
 static inline void dec_zcache_pers_pageframes(void)
 {
 	zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic);
 }
 static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_pageframes_freed;
+static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_eph_zpages;
 static inline void inc_zcache_pageframes_alloced(void)
 {
 	zcache_pageframes_alloced = atomic_inc_return(&zcache_pageframes_alloced_atomic);
 };
-static long zcache_pageframes_freed;
-static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
 static inline void inc_zcache_pageframes_freed(void)
 {
 	zcache_pageframes_freed = atomic_inc_return(&zcache_pageframes_freed_atomic);
 }
-static long zcache_eph_zpages;
+static ssize_t zcache_eph_zpages;
 static atomic_t zcache_eph_zpages_atomic = ATOMIC_INIT(0);
-static long zcache_eph_zpages_max;
+static ssize_t zcache_eph_zpages_max;
 static inline void inc_zcache_eph_zpages(void)
 {
 	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
 	if (zcache_eph_zpages > zcache_eph_zpages_max)
 		zcache_eph_zpages_max = zcache_eph_zpages;
 }
-static long zcache_pers_zpages;
+static ssize_t zcache_pers_zpages;
 static inline void dec_zcache_eph_zpages(unsigned zpages)
 {
 	zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
 }
 static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
-static long zcache_pers_zpages_max;
+static ssize_t zcache_pers_zpages_max;
 static inline void inc_zcache_pers_zpages(void)
 {
 	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
@@ -259,29 +260,29 @@ static inline unsigned long curr_pageframes_count(void)
 		atomic_read(&zcache_pers_pageframes_atomic);
 };
 /* but for the rest of these, counting races are ok */
-static unsigned long zcache_flush_total;
-static unsigned long zcache_flush_found;
-static unsigned long zcache_flobj_total;
-static unsigned long zcache_flobj_found;
-static unsigned long zcache_failed_eph_puts;
-static unsigned long zcache_failed_pers_puts;
-static unsigned long zcache_failed_getfreepages;
-static unsigned long zcache_failed_alloc;
-static unsigned long zcache_put_to_flush;
-static unsigned long zcache_compress_poor;
-static unsigned long zcache_mean_compress_poor;
-static unsigned long zcache_eph_ate_tail;
-static unsigned long zcache_eph_ate_tail_failed;
-static unsigned long zcache_pers_ate_eph;
-static unsigned long zcache_pers_ate_eph_failed;
-static unsigned long zcache_evicted_eph_zpages;
-static unsigned long zcache_evicted_eph_pageframes;
-static unsigned long zcache_last_active_file_pageframes;
-static unsigned long zcache_last_inactive_file_pageframes;
-static unsigned long zcache_last_active_anon_pageframes;
-static unsigned long zcache_last_inactive_anon_pageframes;
-static unsigned long zcache_eph_nonactive_puts_ignored;
-static unsigned long zcache_pers_nonactive_puts_ignored;
+static ssize_t zcache_flush_total;
+static ssize_t zcache_flush_found;
+static ssize_t zcache_flobj_total;
+static ssize_t zcache_flobj_found;
+static ssize_t zcache_failed_eph_puts;
+static ssize_t zcache_failed_pers_puts;
+static ssize_t zcache_failed_getfreepages;
+static ssize_t zcache_failed_alloc;
+static ssize_t zcache_put_to_flush;
+static ssize_t zcache_compress_poor;
+static ssize_t zcache_mean_compress_poor;
+static ssize_t zcache_eph_ate_tail;
+static ssize_t zcache_eph_ate_tail_failed;
+static ssize_t zcache_pers_ate_eph;
+static ssize_t zcache_pers_ate_eph_failed;
+static ssize_t zcache_evicted_eph_zpages;
+static ssize_t zcache_evicted_eph_pageframes;
+static ssize_t zcache_last_active_file_pageframes;
+static ssize_t zcache_last_inactive_file_pageframes;
+static ssize_t zcache_last_active_anon_pageframes;
+static ssize_t zcache_last_inactive_anon_pageframes;
+static ssize_t zcache_eph_nonactive_puts_ignored;
+static ssize_t zcache_pers_nonactive_puts_ignored;
 
 #ifdef CONFIG_DEBUG_FS
 #include <linux/debugfs.h>
@@ -351,41 +352,41 @@ static int zcache_debugfs_init(void)
 /* developers can call this in case of ooms, e.g. to find memory leaks */
 void zcache_dump(void)
 {
-	pr_info("zcache: obj_count=%lu\n", zcache_obj_count);
-	pr_info("zcache: obj_count_max=%lu\n", zcache_obj_count_max);
-	pr_info("zcache: objnode_count=%lu\n", zcache_objnode_count);
-	pr_info("zcache: objnode_count_max=%lu\n", zcache_objnode_count_max);
-	pr_info("zcache: flush_total=%lu\n", zcache_flush_total);
-	pr_info("zcache: flush_found=%lu\n", zcache_flush_found);
-	pr_info("zcache: flobj_total=%lu\n", zcache_flobj_total);
-	pr_info("zcache: flobj_found=%lu\n", zcache_flobj_found);
-	pr_info("zcache: failed_eph_puts=%lu\n", zcache_failed_eph_puts);
-	pr_info("zcache: failed_pers_puts=%lu\n", zcache_failed_pers_puts);
-	pr_info("zcache: failed_get_free_pages=%lu\n",
+	pr_info("zcache: obj_count=%u\n", zcache_obj_count);
+	pr_info("zcache: obj_count_max=%u\n", zcache_obj_count_max);
+	pr_info("zcache: objnode_count=%u\n", zcache_objnode_count);
+	pr_info("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
+	pr_info("zcache: flush_total=%u\n", zcache_flush_total);
+	pr_info("zcache: flush_found=%u\n", zcache_flush_found);
+	pr_info("zcache: flobj_total=%u\n", zcache_flobj_total);
+	pr_info("zcache: flobj_found=%u\n", zcache_flobj_found);
+	pr_info("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
+	pr_info("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
+	pr_info("zcache: failed_get_free_pages=%u\n",
 				zcache_failed_getfreepages);
-	pr_info("zcache: failed_alloc=%lu\n", zcache_failed_alloc);
-	pr_info("zcache: put_to_flush=%lu\n", zcache_put_to_flush);
-	pr_info("zcache: compress_poor=%lu\n", zcache_compress_poor);
-	pr_info("zcache: mean_compress_poor=%lu\n",
+	pr_info("zcache: failed_alloc=%u\n", zcache_failed_alloc);
+	pr_info("zcache: put_to_flush=%u\n", zcache_put_to_flush);
+	pr_info("zcache: compress_poor=%u\n", zcache_compress_poor);
+	pr_info("zcache: mean_compress_poor=%u\n",
 				zcache_mean_compress_poor);
-	pr_info("zcache: eph_ate_tail=%lu\n", zcache_eph_ate_tail);
-	pr_info("zcache: eph_ate_tail_failed=%lu\n",
+	pr_info("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
+	pr_info("zcache: eph_ate_tail_failed=%u\n",
 				zcache_eph_ate_tail_failed);
-	pr_info("zcache: pers_ate_eph=%lu\n", zcache_pers_ate_eph);
-	pr_info("zcache: pers_ate_eph_failed=%lu\n",
+	pr_info("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
+	pr_info("zcache: pers_ate_eph_failed=%u\n",
 				zcache_pers_ate_eph_failed);
-	pr_info("zcache: evicted_eph_zpages=%lu\n", zcache_evicted_eph_zpages);
-	pr_info("zcache: evicted_eph_pageframes=%lu\n",
+	pr_info("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
+	pr_info("zcache: evicted_eph_pageframes=%u\n",
 				zcache_evicted_eph_pageframes);
-	pr_info("zcache: eph_pageframes=%lu\n", zcache_eph_pageframes);
-	pr_info("zcache: eph_pageframes_max=%lu\n", zcache_eph_pageframes_max);
-	pr_info("zcache: pers_pageframes=%lu\n", zcache_pers_pageframes);
-	pr_info("zcache: pers_pageframes_max=%lu\n",
+	pr_info("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
+	pr_info("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
+	pr_info("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
+	pr_info("zcache: pers_pageframes_max=%u\n",
 				zcache_pers_pageframes_max);
-	pr_info("zcache: eph_zpages=%lu\n", zcache_eph_zpages);
-	pr_info("zcache: eph_zpages_max=%lu\n", zcache_eph_zpages_max);
-	pr_info("zcache: pers_zpages=%lu\n", zcache_pers_zpages);
-	pr_info("zcache: pers_zpages_max=%lu\n", zcache_pers_zpages_max);
+	pr_info("zcache: eph_zpages=%u\n", zcache_eph_zpages);
+	pr_info("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
+	pr_info("zcache: pers_zpages=%u\n", zcache_pers_zpages);
+	pr_info("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
 	pr_info("zcache: eph_zbytes=%llu\n",
 				(unsigned long long)zcache_eph_zbytes);
 	pr_info("zcache: eph_zbytes_max=%llu\n",
-- 
1.7.7.6

[PATCH 06/11] zcache: Fix compile warnings due to usage of debugfs_create_size_t

[Konrad Rzeszutek Wilk]

When we compile we get tons of:
include/linux/debugfs.h:80:16: note: expected ‘size_t *’ but argument is
of type ‘long int *’
drivers/staging/ramster/zcache-main.c:279:2: warning: passing argument 4
of ‘debugfs_create_size_t’ from incompatible pointer type [enabled by d
efault]

which is b/c we end up using 'unsigned' or 'unsigned long' instead
of 'ssize_t'. So lets fix this up and use the proper type.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |  135 +++++++++++++++++----------------
 1 files changed, 68 insertions(+), 67 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 3402acc..1f354f2 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -132,23 +132,23 @@ static struct kmem_cache *zcache_obj_cache;
 static DEFINE_PER_CPU(struct zcache_preload, zcache_preloads) = { 0, };
 
 /* we try to keep these statistics SMP-consistent */
-static long zcache_obj_count;
+static ssize_t zcache_obj_count;
 static atomic_t zcache_obj_atomic = ATOMIC_INIT(0);
-static long zcache_obj_count_max;
+static ssize_t zcache_obj_count_max;
 static inline void inc_zcache_obj_count(void)
 {
 	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
 	if (zcache_obj_count > zcache_obj_count_max)
 		zcache_obj_count_max = zcache_obj_count;
 }
-static long zcache_objnode_count;
+static ssize_t zcache_objnode_count;
 static inline void dec_zcache_obj_count(void)
 {
 	zcache_obj_count = atomic_dec_return(&zcache_obj_atomic);
 	BUG_ON(zcache_obj_count < 0);
 };
 static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
-static long zcache_objnode_count_max;
+static ssize_t zcache_objnode_count_max;
 static inline void inc_zcache_objnode_count(void)
 {
 	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
@@ -182,64 +182,65 @@ static inline void inc_zcache_pers_zbytes(unsigned clen)
 	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
 		zcache_pers_zbytes_max = zcache_pers_zbytes;
 }
-static long zcache_eph_pageframes;
+static ssize_t zcache_eph_pageframes;
 static inline void dec_zcache_pers_zbytes(unsigned zsize)
 {
 	zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
 }
 static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
-static long zcache_eph_pageframes_max;
+static ssize_t zcache_eph_pageframes_max;
 static inline void inc_zcache_eph_pageframes(void)
 {
 	zcache_eph_pageframes = atomic_inc_return(&zcache_eph_pageframes_atomic);
 	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
 		zcache_eph_pageframes_max = zcache_eph_pageframes;
 };
-static long zcache_pers_pageframes;
+static ssize_t zcache_pers_pageframes;
 static inline void dec_zcache_eph_pageframes(void)
 {
 	zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic);
 };
 static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
-static long zcache_pers_pageframes_max;
+static ssize_t zcache_pers_pageframes_max;
 static inline void inc_zcache_pers_pageframes(void)
 {
 	zcache_pers_pageframes = atomic_inc_return(&zcache_pers_pageframes_atomic);
 	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
 		zcache_pers_pageframes_max = zcache_pers_pageframes;
 }
-static long zcache_pageframes_alloced;
+static ssize_t zcache_pageframes_alloced;
 static inline void dec_zcache_pers_pageframes(void)
 {
 	zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic);
 }
 static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_pageframes_freed;
+static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_eph_zpages;
 static inline void inc_zcache_pageframes_alloced(void)
 {
 	zcache_pageframes_alloced = atomic_inc_return(&zcache_pageframes_alloced_atomic);
 };
-static long zcache_pageframes_freed;
-static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
 static inline void inc_zcache_pageframes_freed(void)
 {
 	zcache_pageframes_freed = atomic_inc_return(&zcache_pageframes_freed_atomic);
 }
-static long zcache_eph_zpages;
+static ssize_t zcache_eph_zpages;
 static atomic_t zcache_eph_zpages_atomic = ATOMIC_INIT(0);
-static long zcache_eph_zpages_max;
+static ssize_t zcache_eph_zpages_max;
 static inline void inc_zcache_eph_zpages(void)
 {
 	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
 	if (zcache_eph_zpages > zcache_eph_zpages_max)
 		zcache_eph_zpages_max = zcache_eph_zpages;
 }
-static long zcache_pers_zpages;
+static ssize_t zcache_pers_zpages;
 static inline void dec_zcache_eph_zpages(unsigned zpages)
 {
 	zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
 }
 static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
-static long zcache_pers_zpages_max;
+static ssize_t zcache_pers_zpages_max;
 static inline void inc_zcache_pers_zpages(void)
 {
 	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
@@ -259,29 +260,29 @@ static inline unsigned long curr_pageframes_count(void)
 		atomic_read(&zcache_pers_pageframes_atomic);
 };
 /* but for the rest of these, counting races are ok */
-static unsigned long zcache_flush_total;
-static unsigned long zcache_flush_found;
-static unsigned long zcache_flobj_total;
-static unsigned long zcache_flobj_found;
-static unsigned long zcache_failed_eph_puts;
-static unsigned long zcache_failed_pers_puts;
-static unsigned long zcache_failed_getfreepages;
-static unsigned long zcache_failed_alloc;
-static unsigned long zcache_put_to_flush;
-static unsigned long zcache_compress_poor;
-static unsigned long zcache_mean_compress_poor;
-static unsigned long zcache_eph_ate_tail;
-static unsigned long zcache_eph_ate_tail_failed;
-static unsigned long zcache_pers_ate_eph;
-static unsigned long zcache_pers_ate_eph_failed;
-static unsigned long zcache_evicted_eph_zpages;
-static unsigned long zcache_evicted_eph_pageframes;
-static unsigned long zcache_last_active_file_pageframes;
-static unsigned long zcache_last_inactive_file_pageframes;
-static unsigned long zcache_last_active_anon_pageframes;
-static unsigned long zcache_last_inactive_anon_pageframes;
-static unsigned long zcache_eph_nonactive_puts_ignored;
-static unsigned long zcache_pers_nonactive_puts_ignored;
+static ssize_t zcache_flush_total;
+static ssize_t zcache_flush_found;
+static ssize_t zcache_flobj_total;
+static ssize_t zcache_flobj_found;
+static ssize_t zcache_failed_eph_puts;
+static ssize_t zcache_failed_pers_puts;
+static ssize_t zcache_failed_getfreepages;
+static ssize_t zcache_failed_alloc;
+static ssize_t zcache_put_to_flush;
+static ssize_t zcache_compress_poor;
+static ssize_t zcache_mean_compress_poor;
+static ssize_t zcache_eph_ate_tail;
+static ssize_t zcache_eph_ate_tail_failed;
+static ssize_t zcache_pers_ate_eph;
+static ssize_t zcache_pers_ate_eph_failed;
+static ssize_t zcache_evicted_eph_zpages;
+static ssize_t zcache_evicted_eph_pageframes;
+static ssize_t zcache_last_active_file_pageframes;
+static ssize_t zcache_last_inactive_file_pageframes;
+static ssize_t zcache_last_active_anon_pageframes;
+static ssize_t zcache_last_inactive_anon_pageframes;
+static ssize_t zcache_eph_nonactive_puts_ignored;
+static ssize_t zcache_pers_nonactive_puts_ignored;
 
 #ifdef CONFIG_DEBUG_FS
 #include <linux/debugfs.h>
@@ -351,41 +352,41 @@ static int zcache_debugfs_init(void)
 /* developers can call this in case of ooms, e.g. to find memory leaks */
 void zcache_dump(void)
 {
-	pr_info("zcache: obj_count=%lu\n", zcache_obj_count);
-	pr_info("zcache: obj_count_max=%lu\n", zcache_obj_count_max);
-	pr_info("zcache: objnode_count=%lu\n", zcache_objnode_count);
-	pr_info("zcache: objnode_count_max=%lu\n", zcache_objnode_count_max);
-	pr_info("zcache: flush_total=%lu\n", zcache_flush_total);
-	pr_info("zcache: flush_found=%lu\n", zcache_flush_found);
-	pr_info("zcache: flobj_total=%lu\n", zcache_flobj_total);
-	pr_info("zcache: flobj_found=%lu\n", zcache_flobj_found);
-	pr_info("zcache: failed_eph_puts=%lu\n", zcache_failed_eph_puts);
-	pr_info("zcache: failed_pers_puts=%lu\n", zcache_failed_pers_puts);
-	pr_info("zcache: failed_get_free_pages=%lu\n",
+	pr_info("zcache: obj_count=%u\n", zcache_obj_count);
+	pr_info("zcache: obj_count_max=%u\n", zcache_obj_count_max);
+	pr_info("zcache: objnode_count=%u\n", zcache_objnode_count);
+	pr_info("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
+	pr_info("zcache: flush_total=%u\n", zcache_flush_total);
+	pr_info("zcache: flush_found=%u\n", zcache_flush_found);
+	pr_info("zcache: flobj_total=%u\n", zcache_flobj_total);
+	pr_info("zcache: flobj_found=%u\n", zcache_flobj_found);
+	pr_info("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
+	pr_info("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
+	pr_info("zcache: failed_get_free_pages=%u\n",
 				zcache_failed_getfreepages);
-	pr_info("zcache: failed_alloc=%lu\n", zcache_failed_alloc);
-	pr_info("zcache: put_to_flush=%lu\n", zcache_put_to_flush);
-	pr_info("zcache: compress_poor=%lu\n", zcache_compress_poor);
-	pr_info("zcache: mean_compress_poor=%lu\n",
+	pr_info("zcache: failed_alloc=%u\n", zcache_failed_alloc);
+	pr_info("zcache: put_to_flush=%u\n", zcache_put_to_flush);
+	pr_info("zcache: compress_poor=%u\n", zcache_compress_poor);
+	pr_info("zcache: mean_compress_poor=%u\n",
 				zcache_mean_compress_poor);
-	pr_info("zcache: eph_ate_tail=%lu\n", zcache_eph_ate_tail);
-	pr_info("zcache: eph_ate_tail_failed=%lu\n",
+	pr_info("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
+	pr_info("zcache: eph_ate_tail_failed=%u\n",
 				zcache_eph_ate_tail_failed);
-	pr_info("zcache: pers_ate_eph=%lu\n", zcache_pers_ate_eph);
-	pr_info("zcache: pers_ate_eph_failed=%lu\n",
+	pr_info("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
+	pr_info("zcache: pers_ate_eph_failed=%u\n",
 				zcache_pers_ate_eph_failed);
-	pr_info("zcache: evicted_eph_zpages=%lu\n", zcache_evicted_eph_zpages);
-	pr_info("zcache: evicted_eph_pageframes=%lu\n",
+	pr_info("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
+	pr_info("zcache: evicted_eph_pageframes=%u\n",
 				zcache_evicted_eph_pageframes);
-	pr_info("zcache: eph_pageframes=%lu\n", zcache_eph_pageframes);
-	pr_info("zcache: eph_pageframes_max=%lu\n", zcache_eph_pageframes_max);
-	pr_info("zcache: pers_pageframes=%lu\n", zcache_pers_pageframes);
-	pr_info("zcache: pers_pageframes_max=%lu\n",
+	pr_info("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
+	pr_info("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
+	pr_info("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
+	pr_info("zcache: pers_pageframes_max=%u\n",
 				zcache_pers_pageframes_max);
-	pr_info("zcache: eph_zpages=%lu\n", zcache_eph_zpages);
-	pr_info("zcache: eph_zpages_max=%lu\n", zcache_eph_zpages_max);
-	pr_info("zcache: pers_zpages=%lu\n", zcache_pers_zpages);
-	pr_info("zcache: pers_zpages_max=%lu\n", zcache_pers_zpages_max);
+	pr_info("zcache: eph_zpages=%u\n", zcache_eph_zpages);
+	pr_info("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
+	pr_info("zcache: pers_zpages=%u\n", zcache_pers_zpages);
+	pr_info("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
 	pr_info("zcache: eph_zbytes=%llu\n",
 				(unsigned long long)zcache_eph_zbytes);
 	pr_info("zcache: eph_zbytes_max=%llu\n",
-- 
1.7.7.6

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[PATCH 07/11] zcache: Make the debug code use pr_debug

[Konrad Rzeszutek Wilk]

as if you are debugging this driver you would be using 'debug'
on the command line anyhow - and this would dump the debug
data on the proper loglevel.

While at it also remove the unconditional #define ZCACHE_DEBUG.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |   69 ++++++++++++++++-----------------
 1 files changed, 33 insertions(+), 36 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 1f354f2..470ce5c 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -347,56 +347,53 @@ static int zcache_debugfs_init(void)
 #undef	zdfs64
 #endif
 
-#define ZCACHE_DEBUG
-#ifdef ZCACHE_DEBUG
 /* developers can call this in case of ooms, e.g. to find memory leaks */
 void zcache_dump(void)
 {
-	pr_info("zcache: obj_count=%u\n", zcache_obj_count);
-	pr_info("zcache: obj_count_max=%u\n", zcache_obj_count_max);
-	pr_info("zcache: objnode_count=%u\n", zcache_objnode_count);
-	pr_info("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
-	pr_info("zcache: flush_total=%u\n", zcache_flush_total);
-	pr_info("zcache: flush_found=%u\n", zcache_flush_found);
-	pr_info("zcache: flobj_total=%u\n", zcache_flobj_total);
-	pr_info("zcache: flobj_found=%u\n", zcache_flobj_found);
-	pr_info("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
-	pr_info("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
-	pr_info("zcache: failed_get_free_pages=%u\n",
+	pr_debug("zcache: obj_count=%u\n", zcache_obj_count);
+	pr_debug("zcache: obj_count_max=%u\n", zcache_obj_count_max);
+	pr_debug("zcache: objnode_count=%u\n", zcache_objnode_count);
+	pr_debug("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
+	pr_debug("zcache: flush_total=%u\n", zcache_flush_total);
+	pr_debug("zcache: flush_found=%u\n", zcache_flush_found);
+	pr_debug("zcache: flobj_total=%u\n", zcache_flobj_total);
+	pr_debug("zcache: flobj_found=%u\n", zcache_flobj_found);
+	pr_debug("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
+	pr_debug("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
+	pr_debug("zcache: failed_get_free_pages=%u\n",
 				zcache_failed_getfreepages);
-	pr_info("zcache: failed_alloc=%u\n", zcache_failed_alloc);
-	pr_info("zcache: put_to_flush=%u\n", zcache_put_to_flush);
-	pr_info("zcache: compress_poor=%u\n", zcache_compress_poor);
-	pr_info("zcache: mean_compress_poor=%u\n",
+	pr_debug("zcache: failed_alloc=%u\n", zcache_failed_alloc);
+	pr_debug("zcache: put_to_flush=%u\n", zcache_put_to_flush);
+	pr_debug("zcache: compress_poor=%u\n", zcache_compress_poor);
+	pr_debug("zcache: mean_compress_poor=%u\n",
 				zcache_mean_compress_poor);
-	pr_info("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
-	pr_info("zcache: eph_ate_tail_failed=%u\n",
+	pr_debug("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
+	pr_debug("zcache: eph_ate_tail_failed=%u\n",
 				zcache_eph_ate_tail_failed);
-	pr_info("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
-	pr_info("zcache: pers_ate_eph_failed=%u\n",
+	pr_debug("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
+	pr_debug("zcache: pers_ate_eph_failed=%u\n",
 				zcache_pers_ate_eph_failed);
-	pr_info("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
-	pr_info("zcache: evicted_eph_pageframes=%u\n",
+	pr_debug("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
+	pr_debug("zcache: evicted_eph_pageframes=%u\n",
 				zcache_evicted_eph_pageframes);
-	pr_info("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
-	pr_info("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
-	pr_info("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
-	pr_info("zcache: pers_pageframes_max=%u\n",
+	pr_debug("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
+	pr_debug("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
+	pr_debug("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
+	pr_debug("zcache: pers_pageframes_max=%u\n",
 				zcache_pers_pageframes_max);
-	pr_info("zcache: eph_zpages=%u\n", zcache_eph_zpages);
-	pr_info("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
-	pr_info("zcache: pers_zpages=%u\n", zcache_pers_zpages);
-	pr_info("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
-	pr_info("zcache: eph_zbytes=%llu\n",
+	pr_debug("zcache: eph_zpages=%u\n", zcache_eph_zpages);
+	pr_debug("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
+	pr_debug("zcache: pers_zpages=%u\n", zcache_pers_zpages);
+	pr_debug("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
+	pr_debug("zcache: eph_zbytes=%llu\n",
 				(unsigned long long)zcache_eph_zbytes);
-	pr_info("zcache: eph_zbytes_max=%llu\n",
+	pr_debug("zcache: eph_zbytes_max=%llu\n",
 				(unsigned long long)zcache_eph_zbytes_max);
-	pr_info("zcache: pers_zbytes=%llu\n",
+	pr_debug("zcache: pers_zbytes=%llu\n",
 				(unsigned long long)zcache_pers_zbytes);
-	pr_info("zcache: pers_zbytes_max=%llu\n",
+	pr_debug("zcache: pers_zbytes_max=%llu\n",
 			(unsigned long long)zcache_pers_zbytes_max);
 }
-#endif
 
 /*
  * zcache core code starts here
-- 
1.7.7.6

[PATCH 07/11] zcache: Make the debug code use pr_debug

[Konrad Rzeszutek Wilk]

as if you are debugging this driver you would be using 'debug'
on the command line anyhow - and this would dump the debug
data on the proper loglevel.

While at it also remove the unconditional #define ZCACHE_DEBUG.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/zcache-main.c |   69 ++++++++++++++++-----------------
 1 files changed, 33 insertions(+), 36 deletions(-)

diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 1f354f2..470ce5c 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -347,56 +347,53 @@ static int zcache_debugfs_init(void)
 #undef	zdfs64
 #endif
 
-#define ZCACHE_DEBUG
-#ifdef ZCACHE_DEBUG
 /* developers can call this in case of ooms, e.g. to find memory leaks */
 void zcache_dump(void)
 {
-	pr_info("zcache: obj_count=%u\n", zcache_obj_count);
-	pr_info("zcache: obj_count_max=%u\n", zcache_obj_count_max);
-	pr_info("zcache: objnode_count=%u\n", zcache_objnode_count);
-	pr_info("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
-	pr_info("zcache: flush_total=%u\n", zcache_flush_total);
-	pr_info("zcache: flush_found=%u\n", zcache_flush_found);
-	pr_info("zcache: flobj_total=%u\n", zcache_flobj_total);
-	pr_info("zcache: flobj_found=%u\n", zcache_flobj_found);
-	pr_info("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
-	pr_info("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
-	pr_info("zcache: failed_get_free_pages=%u\n",
+	pr_debug("zcache: obj_count=%u\n", zcache_obj_count);
+	pr_debug("zcache: obj_count_max=%u\n", zcache_obj_count_max);
+	pr_debug("zcache: objnode_count=%u\n", zcache_objnode_count);
+	pr_debug("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
+	pr_debug("zcache: flush_total=%u\n", zcache_flush_total);
+	pr_debug("zcache: flush_found=%u\n", zcache_flush_found);
+	pr_debug("zcache: flobj_total=%u\n", zcache_flobj_total);
+	pr_debug("zcache: flobj_found=%u\n", zcache_flobj_found);
+	pr_debug("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
+	pr_debug("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
+	pr_debug("zcache: failed_get_free_pages=%u\n",
 				zcache_failed_getfreepages);
-	pr_info("zcache: failed_alloc=%u\n", zcache_failed_alloc);
-	pr_info("zcache: put_to_flush=%u\n", zcache_put_to_flush);
-	pr_info("zcache: compress_poor=%u\n", zcache_compress_poor);
-	pr_info("zcache: mean_compress_poor=%u\n",
+	pr_debug("zcache: failed_alloc=%u\n", zcache_failed_alloc);
+	pr_debug("zcache: put_to_flush=%u\n", zcache_put_to_flush);
+	pr_debug("zcache: compress_poor=%u\n", zcache_compress_poor);
+	pr_debug("zcache: mean_compress_poor=%u\n",
 				zcache_mean_compress_poor);
-	pr_info("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
-	pr_info("zcache: eph_ate_tail_failed=%u\n",
+	pr_debug("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
+	pr_debug("zcache: eph_ate_tail_failed=%u\n",
 				zcache_eph_ate_tail_failed);
-	pr_info("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
-	pr_info("zcache: pers_ate_eph_failed=%u\n",
+	pr_debug("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
+	pr_debug("zcache: pers_ate_eph_failed=%u\n",
 				zcache_pers_ate_eph_failed);
-	pr_info("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
-	pr_info("zcache: evicted_eph_pageframes=%u\n",
+	pr_debug("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
+	pr_debug("zcache: evicted_eph_pageframes=%u\n",
 				zcache_evicted_eph_pageframes);
-	pr_info("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
-	pr_info("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
-	pr_info("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
-	pr_info("zcache: pers_pageframes_max=%u\n",
+	pr_debug("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
+	pr_debug("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
+	pr_debug("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
+	pr_debug("zcache: pers_pageframes_max=%u\n",
 				zcache_pers_pageframes_max);
-	pr_info("zcache: eph_zpages=%u\n", zcache_eph_zpages);
-	pr_info("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
-	pr_info("zcache: pers_zpages=%u\n", zcache_pers_zpages);
-	pr_info("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
-	pr_info("zcache: eph_zbytes=%llu\n",
+	pr_debug("zcache: eph_zpages=%u\n", zcache_eph_zpages);
+	pr_debug("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
+	pr_debug("zcache: pers_zpages=%u\n", zcache_pers_zpages);
+	pr_debug("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
+	pr_debug("zcache: eph_zbytes=%llu\n",
 				(unsigned long long)zcache_eph_zbytes);
-	pr_info("zcache: eph_zbytes_max=%llu\n",
+	pr_debug("zcache: eph_zbytes_max=%llu\n",
 				(unsigned long long)zcache_eph_zbytes_max);
-	pr_info("zcache: pers_zbytes=%llu\n",
+	pr_debug("zcache: pers_zbytes=%llu\n",
 				(unsigned long long)zcache_pers_zbytes);
-	pr_info("zcache: pers_zbytes_max=%llu\n",
+	pr_debug("zcache: pers_zbytes_max=%llu\n",
 			(unsigned long long)zcache_pers_zbytes_max);
 }
-#endif
 
 /*
  * zcache core code starts here
-- 
1.7.7.6

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[PATCH 08/11] zcache: Move debugfs code out of zcache-main.c file.

[Konrad Rzeszutek Wilk]

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/Makefile      |    1 +
 drivers/staging/ramster/debug.c       |  113 +++++++++++++++
 drivers/staging/ramster/debug.h       |  183 ++++++++++++++++++++++++
 drivers/staging/ramster/zcache-main.c |  247 +--------------------------------
 4 files changed, 304 insertions(+), 240 deletions(-)
 create mode 100644 drivers/staging/ramster/debug.c
 create mode 100644 drivers/staging/ramster/debug.h

diff --git a/drivers/staging/ramster/Makefile b/drivers/staging/ramster/Makefile
index fcb25cb..61f5050 100644
--- a/drivers/staging/ramster/Makefile
+++ b/drivers/staging/ramster/Makefile
@@ -4,4 +4,5 @@ zcache-y	+=	ramster/ramster.o ramster/r2net.o
 zcache-y	+=	ramster/nodemanager.o ramster/tcp.o
 zcache-y	+=	ramster/heartbeat.o ramster/masklog.o
 endif
+zcache-y-$(CONFIG_ZCACHE_DEBUG)	+= debug.o
 obj-$(CONFIG_MODULES)	+= zcache.o
diff --git a/drivers/staging/ramster/debug.c b/drivers/staging/ramster/debug.c
new file mode 100644
index 0000000..0d19715
--- /dev/null
+++ b/drivers/staging/ramster/debug.c
@@ -0,0 +1,113 @@
+#include <linux/atomic.h>
+#include "debug.h"
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#define	zdfs	debugfs_create_size_t
+#define	zdfs64	debugfs_create_u64
+int zcache_debugfs_init(void)
+{
+	struct dentry *root = debugfs_create_dir("zcache", NULL);
+	if (root == NULL)
+		return -ENXIO;
+
+	zdfs("obj_count", S_IRUGO, root, &zcache_obj_count);
+	zdfs("obj_count_max", S_IRUGO, root, &zcache_obj_count_max);
+	zdfs("objnode_count", S_IRUGO, root, &zcache_objnode_count);
+	zdfs("objnode_count_max", S_IRUGO, root, &zcache_objnode_count_max);
+	zdfs("flush_total", S_IRUGO, root, &zcache_flush_total);
+	zdfs("flush_found", S_IRUGO, root, &zcache_flush_found);
+	zdfs("flobj_total", S_IRUGO, root, &zcache_flobj_total);
+	zdfs("flobj_found", S_IRUGO, root, &zcache_flobj_found);
+	zdfs("failed_eph_puts", S_IRUGO, root, &zcache_failed_eph_puts);
+	zdfs("failed_pers_puts", S_IRUGO, root, &zcache_failed_pers_puts);
+	zdfs("failed_get_free_pages", S_IRUGO, root,
+				&zcache_failed_getfreepages);
+	zdfs("failed_alloc", S_IRUGO, root, &zcache_failed_alloc);
+	zdfs("put_to_flush", S_IRUGO, root, &zcache_put_to_flush);
+	zdfs("compress_poor", S_IRUGO, root, &zcache_compress_poor);
+	zdfs("mean_compress_poor", S_IRUGO, root, &zcache_mean_compress_poor);
+	zdfs("eph_ate_tail", S_IRUGO, root, &zcache_eph_ate_tail);
+	zdfs("eph_ate_tail_failed", S_IRUGO, root, &zcache_eph_ate_tail_failed);
+	zdfs("pers_ate_eph", S_IRUGO, root, &zcache_pers_ate_eph);
+	zdfs("pers_ate_eph_failed", S_IRUGO, root, &zcache_pers_ate_eph_failed);
+	zdfs("evicted_eph_zpages", S_IRUGO, root, &zcache_evicted_eph_zpages);
+	zdfs("evicted_eph_pageframes", S_IRUGO, root,
+				&zcache_evicted_eph_pageframes);
+	zdfs("eph_pageframes", S_IRUGO, root, &zcache_eph_pageframes);
+	zdfs("eph_pageframes_max", S_IRUGO, root, &zcache_eph_pageframes_max);
+	zdfs("pers_pageframes", S_IRUGO, root, &zcache_pers_pageframes);
+	zdfs("pers_pageframes_max", S_IRUGO, root, &zcache_pers_pageframes_max);
+	zdfs("eph_zpages", S_IRUGO, root, &zcache_eph_zpages);
+	zdfs("eph_zpages_max", S_IRUGO, root, &zcache_eph_zpages_max);
+	zdfs("pers_zpages", S_IRUGO, root, &zcache_pers_zpages);
+	zdfs("pers_zpages_max", S_IRUGO, root, &zcache_pers_zpages_max);
+	zdfs("last_active_file_pageframes", S_IRUGO, root,
+				&zcache_last_active_file_pageframes);
+	zdfs("last_inactive_file_pageframes", S_IRUGO, root,
+				&zcache_last_inactive_file_pageframes);
+	zdfs("last_active_anon_pageframes", S_IRUGO, root,
+				&zcache_last_active_anon_pageframes);
+	zdfs("last_inactive_anon_pageframes", S_IRUGO, root,
+				&zcache_last_inactive_anon_pageframes);
+	zdfs("eph_nonactive_puts_ignored", S_IRUGO, root,
+				&zcache_eph_nonactive_puts_ignored);
+	zdfs("pers_nonactive_puts_ignored", S_IRUGO, root,
+				&zcache_pers_nonactive_puts_ignored);
+	zdfs64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
+	zdfs64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
+	zdfs64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
+	zdfs64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
+	return 0;
+}
+#undef	zdebugfs
+#undef	zdfs64
+
+/* developers can call this in case of ooms, e.g. to find memory leaks */
+void zcache_dump(void)
+{
+	pr_debug("zcache: obj_count=%u\n", zcache_obj_count);
+	pr_debug("zcache: obj_count_max=%u\n", zcache_obj_count_max);
+	pr_debug("zcache: objnode_count=%u\n", zcache_objnode_count);
+	pr_debug("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
+	pr_debug("zcache: flush_total=%u\n", zcache_flush_total);
+	pr_debug("zcache: flush_found=%u\n", zcache_flush_found);
+	pr_debug("zcache: flobj_total=%u\n", zcache_flobj_total);
+	pr_debug("zcache: flobj_found=%u\n", zcache_flobj_found);
+	pr_debug("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
+	pr_debug("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
+	pr_debug("zcache: failed_get_free_pages=%u\n",
+				zcache_failed_getfreepages);
+	pr_debug("zcache: failed_alloc=%u\n", zcache_failed_alloc);
+	pr_debug("zcache: put_to_flush=%u\n", zcache_put_to_flush);
+	pr_debug("zcache: compress_poor=%u\n", zcache_compress_poor);
+	pr_debug("zcache: mean_compress_poor=%u\n",
+				zcache_mean_compress_poor);
+	pr_debug("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
+	pr_debug("zcache: eph_ate_tail_failed=%u\n",
+				zcache_eph_ate_tail_failed);
+	pr_debug("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
+	pr_debug("zcache: pers_ate_eph_failed=%u\n",
+				zcache_pers_ate_eph_failed);
+	pr_debug("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
+	pr_debug("zcache: evicted_eph_pageframes=%u\n",
+				zcache_evicted_eph_pageframes);
+	pr_debug("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
+	pr_debug("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
+	pr_debug("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
+	pr_debug("zcache: pers_pageframes_max=%u\n",
+				zcache_pers_pageframes_max);
+	pr_debug("zcache: eph_zpages=%u\n", zcache_eph_zpages);
+	pr_debug("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
+	pr_debug("zcache: pers_zpages=%u\n", zcache_pers_zpages);
+	pr_debug("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
+	pr_debug("zcache: eph_zbytes=%llu\n",
+				(unsigned long long)zcache_eph_zbytes);
+	pr_debug("zcache: eph_zbytes_max=%llu\n",
+				(unsigned long long)zcache_eph_zbytes_max);
+	pr_debug("zcache: pers_zbytes=%llu\n",
+				(unsigned long long)zcache_pers_zbytes);
+	pr_debug("zcache: pers_zbytes_max=%llu\n",
+			(unsigned long long)zcache_pers_zbytes_max);
+}
+#endif
diff --git a/drivers/staging/ramster/debug.h b/drivers/staging/ramster/debug.h
new file mode 100644
index 0000000..496735b
--- /dev/null
+++ b/drivers/staging/ramster/debug.h
@@ -0,0 +1,183 @@
+#ifdef CONFIG_ZCACHE_DEBUG
+
+/* we try to keep these statistics SMP-consistent */
+static ssize_t zcache_obj_count;
+static atomic_t zcache_obj_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_obj_count_max;
+static inline void inc_zcache_obj_count(void)
+{
+	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
+	if (zcache_obj_count > zcache_obj_count_max)
+		zcache_obj_count_max = zcache_obj_count;
+}
+static inline void dec_zcache_obj_count(void)
+{
+	zcache_obj_count = atomic_dec_return(&zcache_obj_atomic);
+	BUG_ON(zcache_obj_count < 0);
+};
+static ssize_t zcache_objnode_count;
+static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_objnode_count_max;
+static inline void inc_zcache_objnode_count(void)
+{
+	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
+	if (zcache_objnode_count > zcache_objnode_count_max)
+		zcache_objnode_count_max = zcache_objnode_count;
+};
+static inline void dec_zcache_objnode_count(void)
+{
+	zcache_objnode_count = atomic_dec_return(&zcache_objnode_atomic);
+	BUG_ON(zcache_objnode_count < 0);
+};
+static u64 zcache_eph_zbytes;
+static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0);
+static u64 zcache_eph_zbytes_max;
+static inline void inc_zcache_eph_zbytes(unsigned clen)
+{
+	zcache_eph_zbytes = atomic_long_add_return(clen, &zcache_eph_zbytes_atomic);
+	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
+		zcache_eph_zbytes_max = zcache_eph_zbytes;
+};
+static inline void dec_zcache_eph_zbytes(unsigned zsize)
+{
+	zcache_eph_zbytes = atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
+};
+extern  u64 zcache_pers_zbytes;
+static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0);
+static u64 zcache_pers_zbytes_max;
+static inline void inc_zcache_pers_zbytes(unsigned clen)
+{
+	zcache_pers_zbytes = atomic_long_add_return(clen, &zcache_pers_zbytes_atomic);
+	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
+		zcache_pers_zbytes_max = zcache_pers_zbytes;
+}
+static inline void dec_zcache_pers_zbytes(unsigned zsize)
+{
+	zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
+}
+extern ssize_t zcache_eph_pageframes;
+static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_eph_pageframes_max;
+static inline void inc_zcache_eph_pageframes(void)
+{
+	zcache_eph_pageframes = atomic_inc_return(&zcache_eph_pageframes_atomic);
+	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
+		zcache_eph_pageframes_max = zcache_eph_pageframes;
+};
+static inline void dec_zcache_eph_pageframes(void)
+{
+	zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic);
+};
+extern ssize_t zcache_pers_pageframes;
+static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_pers_pageframes_max;
+static inline void inc_zcache_pers_pageframes(void)
+{
+	zcache_pers_pageframes = atomic_inc_return(&zcache_pers_pageframes_atomic);
+	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
+		zcache_pers_pageframes_max = zcache_pers_pageframes;
+}
+static inline void dec_zcache_pers_pageframes(void)
+{
+	zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic);
+}
+static ssize_t zcache_pageframes_alloced;
+static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
+static inline void inc_zcache_pageframes_alloced(void)
+{
+	zcache_pageframes_alloced = atomic_inc_return(&zcache_pageframes_alloced_atomic);
+};
+static ssize_t zcache_pageframes_freed;
+static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
+static inline void inc_zcache_pageframes_freed(void)
+{
+	zcache_pageframes_freed = atomic_inc_return(&zcache_pageframes_freed_atomic);
+}
+static ssize_t zcache_eph_zpages;
+static atomic_t zcache_eph_zpages_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_eph_zpages_max;
+static inline void inc_zcache_eph_zpages(void)
+{
+	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
+	if (zcache_eph_zpages > zcache_eph_zpages_max)
+		zcache_eph_zpages_max = zcache_eph_zpages;
+}
+static inline void dec_zcache_eph_zpages(unsigned zpages)
+{
+	zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
+}
+extern ssize_t zcache_pers_zpages;
+static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_pers_zpages_max;
+static inline void inc_zcache_pers_zpages(void)
+{
+	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
+	if (zcache_pers_zpages > zcache_pers_zpages_max)
+		zcache_pers_zpages_max = zcache_pers_zpages;
+}
+static inline void dec_zcache_pers_zpages(unsigned zpages)
+{
+	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
+}
+
+static inline unsigned long curr_pageframes_count(void)
+{
+	return zcache_pageframes_alloced -
+		atomic_read(&zcache_pageframes_freed_atomic) -
+		atomic_read(&zcache_eph_pageframes_atomic) -
+		atomic_read(&zcache_pers_pageframes_atomic);
+};
+/* but for the rest of these, counting races are ok */
+extern ssize_t zcache_flush_total;
+extern ssize_t zcache_flush_found;
+extern ssize_t zcache_flobj_total;
+extern ssize_t zcache_flobj_found;
+extern ssize_t zcache_failed_eph_puts;
+extern ssize_t zcache_failed_pers_puts;
+extern ssize_t zcache_failed_getfreepages;
+extern ssize_t zcache_failed_alloc;
+extern ssize_t zcache_put_to_flush;
+extern ssize_t zcache_compress_poor;
+extern ssize_t zcache_mean_compress_poor;
+extern ssize_t zcache_eph_ate_tail;
+extern ssize_t zcache_eph_ate_tail_failed;
+extern ssize_t zcache_pers_ate_eph;
+extern ssize_t zcache_pers_ate_eph_failed;
+extern ssize_t zcache_evicted_eph_zpages;
+extern ssize_t zcache_evicted_eph_pageframes;
+extern ssize_t zcache_last_active_file_pageframes;
+extern ssize_t zcache_last_inactive_file_pageframes;
+extern ssize_t zcache_last_active_anon_pageframes;
+extern ssize_t zcache_last_inactive_anon_pageframes;
+extern ssize_t zcache_eph_nonactive_puts_ignored;
+extern ssize_t zcache_pers_nonactive_puts_ignored;
+
+int zcache_debugfs_init(void);
+#else
+static inline void inc_zcache_obj_count(void) { };
+static inline void dec_zcache_obj_count(void) { };
+static inline void inc_zcache_objnode_count(void) { };
+static inline void dec_zcache_objnode_count(void) { };
+static inline void inc_zcache_eph_zbytes(unsigned clen) { };
+static inline void dec_zcache_eph_zbytes(unsigned zsize) { };
+static inline void inc_zcache_pers_zbytes(unsigned clen) { };
+static inline void dec_zcache_pers_zbytes(unsigned zsize) { };
+static inline void inc_zcache_eph_pageframes(void) { };
+static inline void dec_zcache_eph_pageframes(void) { };
+static inline void inc_zcache_pers_pageframes(void) { };
+static inline void dec_zcache_pers_pageframes(void) { };
+static inline void inc_zcache_pageframes_alloced(void) { };
+static inline void inc_zcache_pageframes_freed(void) { };
+static inline void inc_zcache_eph_zpages(void) { };
+static inline void dec_zcache_eph_zpages(unsigned zpages) { };
+static inline void inc_zcache_pers_zpages(void) { };
+static inline void dec_zcache_pers_zpages(unsigned zpages) { };
+static inline unsigned long curr_pageframes_count(void)
+{
+	return 0;
+};
+static inline int zcache_debugfs_init(void)
+{
+	return 0;
+};
+#endif
diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 470ce5c..013bfa4 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -29,6 +29,7 @@
 #include "zcache.h"
 #include "zbud.h"
 #include "ramster.h"
+#include "debug.h"
 #ifdef CONFIG_RAMSTER
 static bool ramster_enabled __read_mostly;
 static bool disable_frontswap_selfshrink __read_mostly;
@@ -131,135 +132,13 @@ static struct kmem_cache *zcache_obj_cache;
 
 static DEFINE_PER_CPU(struct zcache_preload, zcache_preloads) = { 0, };
 
-/* we try to keep these statistics SMP-consistent */
-static ssize_t zcache_obj_count;
-static atomic_t zcache_obj_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_obj_count_max;
-static inline void inc_zcache_obj_count(void)
-{
-	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
-	if (zcache_obj_count > zcache_obj_count_max)
-		zcache_obj_count_max = zcache_obj_count;
-}
-static ssize_t zcache_objnode_count;
-static inline void dec_zcache_obj_count(void)
-{
-	zcache_obj_count = atomic_dec_return(&zcache_obj_atomic);
-	BUG_ON(zcache_obj_count < 0);
-};
-static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_objnode_count_max;
-static inline void inc_zcache_objnode_count(void)
-{
-	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
-	if (zcache_objnode_count > zcache_objnode_count_max)
-		zcache_objnode_count_max = zcache_objnode_count;
-};
-static inline void dec_zcache_objnode_count(void)
-{
-	zcache_objnode_count = atomic_dec_return(&zcache_objnode_atomic);
-	BUG_ON(zcache_objnode_count < 0);
-};
-static u64 zcache_eph_zbytes;
-static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0);
-static u64 zcache_eph_zbytes_max;
-static inline void inc_zcache_eph_zbytes(unsigned clen)
-{
-	zcache_eph_zbytes = atomic_long_add_return(clen, &zcache_eph_zbytes_atomic);
-	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
-		zcache_eph_zbytes_max = zcache_eph_zbytes;
-};
-static inline void dec_zcache_eph_zbytes(unsigned zsize)
-{
-	zcache_eph_zbytes = atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
-};
-static u64 zcache_pers_zbytes;
-static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0);
-static u64 zcache_pers_zbytes_max;
-static inline void inc_zcache_pers_zbytes(unsigned clen)
-{
-	zcache_pers_zbytes = atomic_long_add_return(clen, &zcache_pers_zbytes_atomic);
-	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
-		zcache_pers_zbytes_max = zcache_pers_zbytes;
-}
-static ssize_t zcache_eph_pageframes;
-static inline void dec_zcache_pers_zbytes(unsigned zsize)
-{
-	zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
-}
-static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_eph_pageframes_max;
-static inline void inc_zcache_eph_pageframes(void)
-{
-	zcache_eph_pageframes = atomic_inc_return(&zcache_eph_pageframes_atomic);
-	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
-		zcache_eph_pageframes_max = zcache_eph_pageframes;
-};
-static ssize_t zcache_pers_pageframes;
-static inline void dec_zcache_eph_pageframes(void)
-{
-	zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic);
-};
-static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_pers_pageframes_max;
-static inline void inc_zcache_pers_pageframes(void)
-{
-	zcache_pers_pageframes = atomic_inc_return(&zcache_pers_pageframes_atomic);
-	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
-		zcache_pers_pageframes_max = zcache_pers_pageframes;
-}
-static ssize_t zcache_pageframes_alloced;
-static inline void dec_zcache_pers_pageframes(void)
-{
-	zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic);
-}
-static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_pageframes_freed;
-static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_eph_zpages;
-static inline void inc_zcache_pageframes_alloced(void)
-{
-	zcache_pageframes_alloced = atomic_inc_return(&zcache_pageframes_alloced_atomic);
-};
-static inline void inc_zcache_pageframes_freed(void)
-{
-	zcache_pageframes_freed = atomic_inc_return(&zcache_pageframes_freed_atomic);
-}
-static ssize_t zcache_eph_zpages;
-static atomic_t zcache_eph_zpages_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_eph_zpages_max;
-static inline void inc_zcache_eph_zpages(void)
-{
-	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
-	if (zcache_eph_zpages > zcache_eph_zpages_max)
-		zcache_eph_zpages_max = zcache_eph_zpages;
-}
-static ssize_t zcache_pers_zpages;
-static inline void dec_zcache_eph_zpages(unsigned zpages)
-{
-	zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
-}
-static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_pers_zpages_max;
-static inline void inc_zcache_pers_zpages(void)
-{
-	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
-	if (zcache_pers_zpages > zcache_pers_zpages_max)
-		zcache_pers_zpages_max = zcache_pers_zpages;
-}
-static inline void dec_zcache_pers_zpages(unsigned zpages)
-{
-	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
-}
+/* Used by debug.c */
+ssize_t zcache_pers_zpages;
+u64 zcache_pers_zbytes;
+ssize_t zcache_eph_pageframes;
+ssize_t zcache_pers_pageframes;
 
-static inline unsigned long curr_pageframes_count(void)
-{
-	return zcache_pageframes_alloced -
-		atomic_read(&zcache_pageframes_freed_atomic) -
-		atomic_read(&zcache_eph_pageframes_atomic) -
-		atomic_read(&zcache_pers_pageframes_atomic);
-};
-/* but for the rest of these, counting races are ok */
+/* Used by this code. */
 static ssize_t zcache_flush_total;
 static ssize_t zcache_flush_found;
 static ssize_t zcache_flobj_total;
@@ -283,118 +162,6 @@ static ssize_t zcache_last_active_anon_pageframes;
 static ssize_t zcache_last_inactive_anon_pageframes;
 static ssize_t zcache_eph_nonactive_puts_ignored;
 static ssize_t zcache_pers_nonactive_puts_ignored;
-
-#ifdef CONFIG_DEBUG_FS
-#include <linux/debugfs.h>
-#define	zdfs	debugfs_create_size_t
-#define	zdfs64	debugfs_create_u64
-static int zcache_debugfs_init(void)
-{
-	struct dentry *root = debugfs_create_dir("zcache", NULL);
-	if (root == NULL)
-		return -ENXIO;
-
-	zdfs("obj_count", S_IRUGO, root, &zcache_obj_count);
-	zdfs("obj_count_max", S_IRUGO, root, &zcache_obj_count_max);
-	zdfs("objnode_count", S_IRUGO, root, &zcache_objnode_count);
-	zdfs("objnode_count_max", S_IRUGO, root, &zcache_objnode_count_max);
-	zdfs("flush_total", S_IRUGO, root, &zcache_flush_total);
-	zdfs("flush_found", S_IRUGO, root, &zcache_flush_found);
-	zdfs("flobj_total", S_IRUGO, root, &zcache_flobj_total);
-	zdfs("flobj_found", S_IRUGO, root, &zcache_flobj_found);
-	zdfs("failed_eph_puts", S_IRUGO, root, &zcache_failed_eph_puts);
-	zdfs("failed_pers_puts", S_IRUGO, root, &zcache_failed_pers_puts);
-	zdfs("failed_get_free_pages", S_IRUGO, root,
-				&zcache_failed_getfreepages);
-	zdfs("failed_alloc", S_IRUGO, root, &zcache_failed_alloc);
-	zdfs("put_to_flush", S_IRUGO, root, &zcache_put_to_flush);
-	zdfs("compress_poor", S_IRUGO, root, &zcache_compress_poor);
-	zdfs("mean_compress_poor", S_IRUGO, root, &zcache_mean_compress_poor);
-	zdfs("eph_ate_tail", S_IRUGO, root, &zcache_eph_ate_tail);
-	zdfs("eph_ate_tail_failed", S_IRUGO, root, &zcache_eph_ate_tail_failed);
-	zdfs("pers_ate_eph", S_IRUGO, root, &zcache_pers_ate_eph);
-	zdfs("pers_ate_eph_failed", S_IRUGO, root, &zcache_pers_ate_eph_failed);
-	zdfs("evicted_eph_zpages", S_IRUGO, root, &zcache_evicted_eph_zpages);
-	zdfs("evicted_eph_pageframes", S_IRUGO, root,
-				&zcache_evicted_eph_pageframes);
-	zdfs("eph_pageframes", S_IRUGO, root, &zcache_eph_pageframes);
-	zdfs("eph_pageframes_max", S_IRUGO, root, &zcache_eph_pageframes_max);
-	zdfs("pers_pageframes", S_IRUGO, root, &zcache_pers_pageframes);
-	zdfs("pers_pageframes_max", S_IRUGO, root, &zcache_pers_pageframes_max);
-	zdfs("eph_zpages", S_IRUGO, root, &zcache_eph_zpages);
-	zdfs("eph_zpages_max", S_IRUGO, root, &zcache_eph_zpages_max);
-	zdfs("pers_zpages", S_IRUGO, root, &zcache_pers_zpages);
-	zdfs("pers_zpages_max", S_IRUGO, root, &zcache_pers_zpages_max);
-	zdfs("last_active_file_pageframes", S_IRUGO, root,
-				&zcache_last_active_file_pageframes);
-	zdfs("last_inactive_file_pageframes", S_IRUGO, root,
-				&zcache_last_inactive_file_pageframes);
-	zdfs("last_active_anon_pageframes", S_IRUGO, root,
-				&zcache_last_active_anon_pageframes);
-	zdfs("last_inactive_anon_pageframes", S_IRUGO, root,
-				&zcache_last_inactive_anon_pageframes);
-	zdfs("eph_nonactive_puts_ignored", S_IRUGO, root,
-				&zcache_eph_nonactive_puts_ignored);
-	zdfs("pers_nonactive_puts_ignored", S_IRUGO, root,
-				&zcache_pers_nonactive_puts_ignored);
-	zdfs64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
-	zdfs64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
-	zdfs64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
-	zdfs64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
-	return 0;
-}
-#undef	zdebugfs
-#undef	zdfs64
-#endif
-
-/* developers can call this in case of ooms, e.g. to find memory leaks */
-void zcache_dump(void)
-{
-	pr_debug("zcache: obj_count=%u\n", zcache_obj_count);
-	pr_debug("zcache: obj_count_max=%u\n", zcache_obj_count_max);
-	pr_debug("zcache: objnode_count=%u\n", zcache_objnode_count);
-	pr_debug("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
-	pr_debug("zcache: flush_total=%u\n", zcache_flush_total);
-	pr_debug("zcache: flush_found=%u\n", zcache_flush_found);
-	pr_debug("zcache: flobj_total=%u\n", zcache_flobj_total);
-	pr_debug("zcache: flobj_found=%u\n", zcache_flobj_found);
-	pr_debug("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
-	pr_debug("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
-	pr_debug("zcache: failed_get_free_pages=%u\n",
-				zcache_failed_getfreepages);
-	pr_debug("zcache: failed_alloc=%u\n", zcache_failed_alloc);
-	pr_debug("zcache: put_to_flush=%u\n", zcache_put_to_flush);
-	pr_debug("zcache: compress_poor=%u\n", zcache_compress_poor);
-	pr_debug("zcache: mean_compress_poor=%u\n",
-				zcache_mean_compress_poor);
-	pr_debug("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
-	pr_debug("zcache: eph_ate_tail_failed=%u\n",
-				zcache_eph_ate_tail_failed);
-	pr_debug("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
-	pr_debug("zcache: pers_ate_eph_failed=%u\n",
-				zcache_pers_ate_eph_failed);
-	pr_debug("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
-	pr_debug("zcache: evicted_eph_pageframes=%u\n",
-				zcache_evicted_eph_pageframes);
-	pr_debug("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
-	pr_debug("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
-	pr_debug("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
-	pr_debug("zcache: pers_pageframes_max=%u\n",
-				zcache_pers_pageframes_max);
-	pr_debug("zcache: eph_zpages=%u\n", zcache_eph_zpages);
-	pr_debug("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
-	pr_debug("zcache: pers_zpages=%u\n", zcache_pers_zpages);
-	pr_debug("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
-	pr_debug("zcache: eph_zbytes=%llu\n",
-				(unsigned long long)zcache_eph_zbytes);
-	pr_debug("zcache: eph_zbytes_max=%llu\n",
-				(unsigned long long)zcache_eph_zbytes_max);
-	pr_debug("zcache: pers_zbytes=%llu\n",
-				(unsigned long long)zcache_pers_zbytes);
-	pr_debug("zcache: pers_zbytes_max=%llu\n",
-			(unsigned long long)zcache_pers_zbytes_max);
-}
-
 /*
  * zcache core code starts here
  */
-- 
1.7.7.6

[PATCH 08/11] zcache: Move debugfs code out of zcache-main.c file.

[Konrad Rzeszutek Wilk]

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/Makefile      |    1 +
 drivers/staging/ramster/debug.c       |  113 +++++++++++++++
 drivers/staging/ramster/debug.h       |  183 ++++++++++++++++++++++++
 drivers/staging/ramster/zcache-main.c |  247 +--------------------------------
 4 files changed, 304 insertions(+), 240 deletions(-)
 create mode 100644 drivers/staging/ramster/debug.c
 create mode 100644 drivers/staging/ramster/debug.h

diff --git a/drivers/staging/ramster/Makefile b/drivers/staging/ramster/Makefile
index fcb25cb..61f5050 100644
--- a/drivers/staging/ramster/Makefile
+++ b/drivers/staging/ramster/Makefile
@@ -4,4 +4,5 @@ zcache-y	+=	ramster/ramster.o ramster/r2net.o
 zcache-y	+=	ramster/nodemanager.o ramster/tcp.o
 zcache-y	+=	ramster/heartbeat.o ramster/masklog.o
 endif
+zcache-y-$(CONFIG_ZCACHE_DEBUG)	+= debug.o
 obj-$(CONFIG_MODULES)	+= zcache.o
diff --git a/drivers/staging/ramster/debug.c b/drivers/staging/ramster/debug.c
new file mode 100644
index 0000000..0d19715
--- /dev/null
+++ b/drivers/staging/ramster/debug.c
@@ -0,0 +1,113 @@
+#include <linux/atomic.h>
+#include "debug.h"
+
+#ifdef CONFIG_DEBUG_FS
+#include <linux/debugfs.h>
+#define	zdfs	debugfs_create_size_t
+#define	zdfs64	debugfs_create_u64
+int zcache_debugfs_init(void)
+{
+	struct dentry *root = debugfs_create_dir("zcache", NULL);
+	if (root == NULL)
+		return -ENXIO;
+
+	zdfs("obj_count", S_IRUGO, root, &zcache_obj_count);
+	zdfs("obj_count_max", S_IRUGO, root, &zcache_obj_count_max);
+	zdfs("objnode_count", S_IRUGO, root, &zcache_objnode_count);
+	zdfs("objnode_count_max", S_IRUGO, root, &zcache_objnode_count_max);
+	zdfs("flush_total", S_IRUGO, root, &zcache_flush_total);
+	zdfs("flush_found", S_IRUGO, root, &zcache_flush_found);
+	zdfs("flobj_total", S_IRUGO, root, &zcache_flobj_total);
+	zdfs("flobj_found", S_IRUGO, root, &zcache_flobj_found);
+	zdfs("failed_eph_puts", S_IRUGO, root, &zcache_failed_eph_puts);
+	zdfs("failed_pers_puts", S_IRUGO, root, &zcache_failed_pers_puts);
+	zdfs("failed_get_free_pages", S_IRUGO, root,
+				&zcache_failed_getfreepages);
+	zdfs("failed_alloc", S_IRUGO, root, &zcache_failed_alloc);
+	zdfs("put_to_flush", S_IRUGO, root, &zcache_put_to_flush);
+	zdfs("compress_poor", S_IRUGO, root, &zcache_compress_poor);
+	zdfs("mean_compress_poor", S_IRUGO, root, &zcache_mean_compress_poor);
+	zdfs("eph_ate_tail", S_IRUGO, root, &zcache_eph_ate_tail);
+	zdfs("eph_ate_tail_failed", S_IRUGO, root, &zcache_eph_ate_tail_failed);
+	zdfs("pers_ate_eph", S_IRUGO, root, &zcache_pers_ate_eph);
+	zdfs("pers_ate_eph_failed", S_IRUGO, root, &zcache_pers_ate_eph_failed);
+	zdfs("evicted_eph_zpages", S_IRUGO, root, &zcache_evicted_eph_zpages);
+	zdfs("evicted_eph_pageframes", S_IRUGO, root,
+				&zcache_evicted_eph_pageframes);
+	zdfs("eph_pageframes", S_IRUGO, root, &zcache_eph_pageframes);
+	zdfs("eph_pageframes_max", S_IRUGO, root, &zcache_eph_pageframes_max);
+	zdfs("pers_pageframes", S_IRUGO, root, &zcache_pers_pageframes);
+	zdfs("pers_pageframes_max", S_IRUGO, root, &zcache_pers_pageframes_max);
+	zdfs("eph_zpages", S_IRUGO, root, &zcache_eph_zpages);
+	zdfs("eph_zpages_max", S_IRUGO, root, &zcache_eph_zpages_max);
+	zdfs("pers_zpages", S_IRUGO, root, &zcache_pers_zpages);
+	zdfs("pers_zpages_max", S_IRUGO, root, &zcache_pers_zpages_max);
+	zdfs("last_active_file_pageframes", S_IRUGO, root,
+				&zcache_last_active_file_pageframes);
+	zdfs("last_inactive_file_pageframes", S_IRUGO, root,
+				&zcache_last_inactive_file_pageframes);
+	zdfs("last_active_anon_pageframes", S_IRUGO, root,
+				&zcache_last_active_anon_pageframes);
+	zdfs("last_inactive_anon_pageframes", S_IRUGO, root,
+				&zcache_last_inactive_anon_pageframes);
+	zdfs("eph_nonactive_puts_ignored", S_IRUGO, root,
+				&zcache_eph_nonactive_puts_ignored);
+	zdfs("pers_nonactive_puts_ignored", S_IRUGO, root,
+				&zcache_pers_nonactive_puts_ignored);
+	zdfs64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
+	zdfs64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
+	zdfs64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
+	zdfs64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
+	return 0;
+}
+#undef	zdebugfs
+#undef	zdfs64
+
+/* developers can call this in case of ooms, e.g. to find memory leaks */
+void zcache_dump(void)
+{
+	pr_debug("zcache: obj_count=%u\n", zcache_obj_count);
+	pr_debug("zcache: obj_count_max=%u\n", zcache_obj_count_max);
+	pr_debug("zcache: objnode_count=%u\n", zcache_objnode_count);
+	pr_debug("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
+	pr_debug("zcache: flush_total=%u\n", zcache_flush_total);
+	pr_debug("zcache: flush_found=%u\n", zcache_flush_found);
+	pr_debug("zcache: flobj_total=%u\n", zcache_flobj_total);
+	pr_debug("zcache: flobj_found=%u\n", zcache_flobj_found);
+	pr_debug("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
+	pr_debug("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
+	pr_debug("zcache: failed_get_free_pages=%u\n",
+				zcache_failed_getfreepages);
+	pr_debug("zcache: failed_alloc=%u\n", zcache_failed_alloc);
+	pr_debug("zcache: put_to_flush=%u\n", zcache_put_to_flush);
+	pr_debug("zcache: compress_poor=%u\n", zcache_compress_poor);
+	pr_debug("zcache: mean_compress_poor=%u\n",
+				zcache_mean_compress_poor);
+	pr_debug("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
+	pr_debug("zcache: eph_ate_tail_failed=%u\n",
+				zcache_eph_ate_tail_failed);
+	pr_debug("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
+	pr_debug("zcache: pers_ate_eph_failed=%u\n",
+				zcache_pers_ate_eph_failed);
+	pr_debug("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
+	pr_debug("zcache: evicted_eph_pageframes=%u\n",
+				zcache_evicted_eph_pageframes);
+	pr_debug("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
+	pr_debug("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
+	pr_debug("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
+	pr_debug("zcache: pers_pageframes_max=%u\n",
+				zcache_pers_pageframes_max);
+	pr_debug("zcache: eph_zpages=%u\n", zcache_eph_zpages);
+	pr_debug("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
+	pr_debug("zcache: pers_zpages=%u\n", zcache_pers_zpages);
+	pr_debug("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
+	pr_debug("zcache: eph_zbytes=%llu\n",
+				(unsigned long long)zcache_eph_zbytes);
+	pr_debug("zcache: eph_zbytes_max=%llu\n",
+				(unsigned long long)zcache_eph_zbytes_max);
+	pr_debug("zcache: pers_zbytes=%llu\n",
+				(unsigned long long)zcache_pers_zbytes);
+	pr_debug("zcache: pers_zbytes_max=%llu\n",
+			(unsigned long long)zcache_pers_zbytes_max);
+}
+#endif
diff --git a/drivers/staging/ramster/debug.h b/drivers/staging/ramster/debug.h
new file mode 100644
index 0000000..496735b
--- /dev/null
+++ b/drivers/staging/ramster/debug.h
@@ -0,0 +1,183 @@
+#ifdef CONFIG_ZCACHE_DEBUG
+
+/* we try to keep these statistics SMP-consistent */
+static ssize_t zcache_obj_count;
+static atomic_t zcache_obj_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_obj_count_max;
+static inline void inc_zcache_obj_count(void)
+{
+	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
+	if (zcache_obj_count > zcache_obj_count_max)
+		zcache_obj_count_max = zcache_obj_count;
+}
+static inline void dec_zcache_obj_count(void)
+{
+	zcache_obj_count = atomic_dec_return(&zcache_obj_atomic);
+	BUG_ON(zcache_obj_count < 0);
+};
+static ssize_t zcache_objnode_count;
+static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_objnode_count_max;
+static inline void inc_zcache_objnode_count(void)
+{
+	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
+	if (zcache_objnode_count > zcache_objnode_count_max)
+		zcache_objnode_count_max = zcache_objnode_count;
+};
+static inline void dec_zcache_objnode_count(void)
+{
+	zcache_objnode_count = atomic_dec_return(&zcache_objnode_atomic);
+	BUG_ON(zcache_objnode_count < 0);
+};
+static u64 zcache_eph_zbytes;
+static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0);
+static u64 zcache_eph_zbytes_max;
+static inline void inc_zcache_eph_zbytes(unsigned clen)
+{
+	zcache_eph_zbytes = atomic_long_add_return(clen, &zcache_eph_zbytes_atomic);
+	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
+		zcache_eph_zbytes_max = zcache_eph_zbytes;
+};
+static inline void dec_zcache_eph_zbytes(unsigned zsize)
+{
+	zcache_eph_zbytes = atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
+};
+extern  u64 zcache_pers_zbytes;
+static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0);
+static u64 zcache_pers_zbytes_max;
+static inline void inc_zcache_pers_zbytes(unsigned clen)
+{
+	zcache_pers_zbytes = atomic_long_add_return(clen, &zcache_pers_zbytes_atomic);
+	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
+		zcache_pers_zbytes_max = zcache_pers_zbytes;
+}
+static inline void dec_zcache_pers_zbytes(unsigned zsize)
+{
+	zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
+}
+extern ssize_t zcache_eph_pageframes;
+static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_eph_pageframes_max;
+static inline void inc_zcache_eph_pageframes(void)
+{
+	zcache_eph_pageframes = atomic_inc_return(&zcache_eph_pageframes_atomic);
+	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
+		zcache_eph_pageframes_max = zcache_eph_pageframes;
+};
+static inline void dec_zcache_eph_pageframes(void)
+{
+	zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic);
+};
+extern ssize_t zcache_pers_pageframes;
+static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_pers_pageframes_max;
+static inline void inc_zcache_pers_pageframes(void)
+{
+	zcache_pers_pageframes = atomic_inc_return(&zcache_pers_pageframes_atomic);
+	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
+		zcache_pers_pageframes_max = zcache_pers_pageframes;
+}
+static inline void dec_zcache_pers_pageframes(void)
+{
+	zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic);
+}
+static ssize_t zcache_pageframes_alloced;
+static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
+static inline void inc_zcache_pageframes_alloced(void)
+{
+	zcache_pageframes_alloced = atomic_inc_return(&zcache_pageframes_alloced_atomic);
+};
+static ssize_t zcache_pageframes_freed;
+static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
+static inline void inc_zcache_pageframes_freed(void)
+{
+	zcache_pageframes_freed = atomic_inc_return(&zcache_pageframes_freed_atomic);
+}
+static ssize_t zcache_eph_zpages;
+static atomic_t zcache_eph_zpages_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_eph_zpages_max;
+static inline void inc_zcache_eph_zpages(void)
+{
+	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
+	if (zcache_eph_zpages > zcache_eph_zpages_max)
+		zcache_eph_zpages_max = zcache_eph_zpages;
+}
+static inline void dec_zcache_eph_zpages(unsigned zpages)
+{
+	zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
+}
+extern ssize_t zcache_pers_zpages;
+static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
+static ssize_t zcache_pers_zpages_max;
+static inline void inc_zcache_pers_zpages(void)
+{
+	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
+	if (zcache_pers_zpages > zcache_pers_zpages_max)
+		zcache_pers_zpages_max = zcache_pers_zpages;
+}
+static inline void dec_zcache_pers_zpages(unsigned zpages)
+{
+	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
+}
+
+static inline unsigned long curr_pageframes_count(void)
+{
+	return zcache_pageframes_alloced -
+		atomic_read(&zcache_pageframes_freed_atomic) -
+		atomic_read(&zcache_eph_pageframes_atomic) -
+		atomic_read(&zcache_pers_pageframes_atomic);
+};
+/* but for the rest of these, counting races are ok */
+extern ssize_t zcache_flush_total;
+extern ssize_t zcache_flush_found;
+extern ssize_t zcache_flobj_total;
+extern ssize_t zcache_flobj_found;
+extern ssize_t zcache_failed_eph_puts;
+extern ssize_t zcache_failed_pers_puts;
+extern ssize_t zcache_failed_getfreepages;
+extern ssize_t zcache_failed_alloc;
+extern ssize_t zcache_put_to_flush;
+extern ssize_t zcache_compress_poor;
+extern ssize_t zcache_mean_compress_poor;
+extern ssize_t zcache_eph_ate_tail;
+extern ssize_t zcache_eph_ate_tail_failed;
+extern ssize_t zcache_pers_ate_eph;
+extern ssize_t zcache_pers_ate_eph_failed;
+extern ssize_t zcache_evicted_eph_zpages;
+extern ssize_t zcache_evicted_eph_pageframes;
+extern ssize_t zcache_last_active_file_pageframes;
+extern ssize_t zcache_last_inactive_file_pageframes;
+extern ssize_t zcache_last_active_anon_pageframes;
+extern ssize_t zcache_last_inactive_anon_pageframes;
+extern ssize_t zcache_eph_nonactive_puts_ignored;
+extern ssize_t zcache_pers_nonactive_puts_ignored;
+
+int zcache_debugfs_init(void);
+#else
+static inline void inc_zcache_obj_count(void) { };
+static inline void dec_zcache_obj_count(void) { };
+static inline void inc_zcache_objnode_count(void) { };
+static inline void dec_zcache_objnode_count(void) { };
+static inline void inc_zcache_eph_zbytes(unsigned clen) { };
+static inline void dec_zcache_eph_zbytes(unsigned zsize) { };
+static inline void inc_zcache_pers_zbytes(unsigned clen) { };
+static inline void dec_zcache_pers_zbytes(unsigned zsize) { };
+static inline void inc_zcache_eph_pageframes(void) { };
+static inline void dec_zcache_eph_pageframes(void) { };
+static inline void inc_zcache_pers_pageframes(void) { };
+static inline void dec_zcache_pers_pageframes(void) { };
+static inline void inc_zcache_pageframes_alloced(void) { };
+static inline void inc_zcache_pageframes_freed(void) { };
+static inline void inc_zcache_eph_zpages(void) { };
+static inline void dec_zcache_eph_zpages(unsigned zpages) { };
+static inline void inc_zcache_pers_zpages(void) { };
+static inline void dec_zcache_pers_zpages(unsigned zpages) { };
+static inline unsigned long curr_pageframes_count(void)
+{
+	return 0;
+};
+static inline int zcache_debugfs_init(void)
+{
+	return 0;
+};
+#endif
diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 470ce5c..013bfa4 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -29,6 +29,7 @@
 #include "zcache.h"
 #include "zbud.h"
 #include "ramster.h"
+#include "debug.h"
 #ifdef CONFIG_RAMSTER
 static bool ramster_enabled __read_mostly;
 static bool disable_frontswap_selfshrink __read_mostly;
@@ -131,135 +132,13 @@ static struct kmem_cache *zcache_obj_cache;
 
 static DEFINE_PER_CPU(struct zcache_preload, zcache_preloads) = { 0, };
 
-/* we try to keep these statistics SMP-consistent */
-static ssize_t zcache_obj_count;
-static atomic_t zcache_obj_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_obj_count_max;
-static inline void inc_zcache_obj_count(void)
-{
-	zcache_obj_count = atomic_inc_return(&zcache_obj_atomic);
-	if (zcache_obj_count > zcache_obj_count_max)
-		zcache_obj_count_max = zcache_obj_count;
-}
-static ssize_t zcache_objnode_count;
-static inline void dec_zcache_obj_count(void)
-{
-	zcache_obj_count = atomic_dec_return(&zcache_obj_atomic);
-	BUG_ON(zcache_obj_count < 0);
-};
-static atomic_t zcache_objnode_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_objnode_count_max;
-static inline void inc_zcache_objnode_count(void)
-{
-	zcache_objnode_count = atomic_inc_return(&zcache_objnode_atomic);
-	if (zcache_objnode_count > zcache_objnode_count_max)
-		zcache_objnode_count_max = zcache_objnode_count;
-};
-static inline void dec_zcache_objnode_count(void)
-{
-	zcache_objnode_count = atomic_dec_return(&zcache_objnode_atomic);
-	BUG_ON(zcache_objnode_count < 0);
-};
-static u64 zcache_eph_zbytes;
-static atomic_long_t zcache_eph_zbytes_atomic = ATOMIC_INIT(0);
-static u64 zcache_eph_zbytes_max;
-static inline void inc_zcache_eph_zbytes(unsigned clen)
-{
-	zcache_eph_zbytes = atomic_long_add_return(clen, &zcache_eph_zbytes_atomic);
-	if (zcache_eph_zbytes > zcache_eph_zbytes_max)
-		zcache_eph_zbytes_max = zcache_eph_zbytes;
-};
-static inline void dec_zcache_eph_zbytes(unsigned zsize)
-{
-	zcache_eph_zbytes = atomic_long_sub_return(zsize, &zcache_eph_zbytes_atomic);
-};
-static u64 zcache_pers_zbytes;
-static atomic_long_t zcache_pers_zbytes_atomic = ATOMIC_INIT(0);
-static u64 zcache_pers_zbytes_max;
-static inline void inc_zcache_pers_zbytes(unsigned clen)
-{
-	zcache_pers_zbytes = atomic_long_add_return(clen, &zcache_pers_zbytes_atomic);
-	if (zcache_pers_zbytes > zcache_pers_zbytes_max)
-		zcache_pers_zbytes_max = zcache_pers_zbytes;
-}
-static ssize_t zcache_eph_pageframes;
-static inline void dec_zcache_pers_zbytes(unsigned zsize)
-{
-	zcache_pers_zbytes = atomic_long_sub_return(zsize, &zcache_pers_zbytes_atomic);
-}
-static atomic_t zcache_eph_pageframes_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_eph_pageframes_max;
-static inline void inc_zcache_eph_pageframes(void)
-{
-	zcache_eph_pageframes = atomic_inc_return(&zcache_eph_pageframes_atomic);
-	if (zcache_eph_pageframes > zcache_eph_pageframes_max)
-		zcache_eph_pageframes_max = zcache_eph_pageframes;
-};
-static ssize_t zcache_pers_pageframes;
-static inline void dec_zcache_eph_pageframes(void)
-{
-	zcache_eph_pageframes = atomic_dec_return(&zcache_eph_pageframes_atomic);
-};
-static atomic_t zcache_pers_pageframes_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_pers_pageframes_max;
-static inline void inc_zcache_pers_pageframes(void)
-{
-	zcache_pers_pageframes = atomic_inc_return(&zcache_pers_pageframes_atomic);
-	if (zcache_pers_pageframes > zcache_pers_pageframes_max)
-		zcache_pers_pageframes_max = zcache_pers_pageframes;
-}
-static ssize_t zcache_pageframes_alloced;
-static inline void dec_zcache_pers_pageframes(void)
-{
-	zcache_pers_pageframes = atomic_dec_return(&zcache_pers_pageframes_atomic);
-}
-static atomic_t zcache_pageframes_alloced_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_pageframes_freed;
-static atomic_t zcache_pageframes_freed_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_eph_zpages;
-static inline void inc_zcache_pageframes_alloced(void)
-{
-	zcache_pageframes_alloced = atomic_inc_return(&zcache_pageframes_alloced_atomic);
-};
-static inline void inc_zcache_pageframes_freed(void)
-{
-	zcache_pageframes_freed = atomic_inc_return(&zcache_pageframes_freed_atomic);
-}
-static ssize_t zcache_eph_zpages;
-static atomic_t zcache_eph_zpages_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_eph_zpages_max;
-static inline void inc_zcache_eph_zpages(void)
-{
-	zcache_eph_zpages = atomic_inc_return(&zcache_eph_zpages_atomic);
-	if (zcache_eph_zpages > zcache_eph_zpages_max)
-		zcache_eph_zpages_max = zcache_eph_zpages;
-}
-static ssize_t zcache_pers_zpages;
-static inline void dec_zcache_eph_zpages(unsigned zpages)
-{
-	zcache_eph_zpages = atomic_sub_return(zpages, &zcache_eph_zpages_atomic);
-}
-static atomic_t zcache_pers_zpages_atomic = ATOMIC_INIT(0);
-static ssize_t zcache_pers_zpages_max;
-static inline void inc_zcache_pers_zpages(void)
-{
-	zcache_pers_zpages = atomic_inc_return(&zcache_pers_zpages_atomic);
-	if (zcache_pers_zpages > zcache_pers_zpages_max)
-		zcache_pers_zpages_max = zcache_pers_zpages;
-}
-static inline void dec_zcache_pers_zpages(unsigned zpages)
-{
-	zcache_pers_zpages = atomic_sub_return(zpages, &zcache_pers_zpages_atomic);
-}
+/* Used by debug.c */
+ssize_t zcache_pers_zpages;
+u64 zcache_pers_zbytes;
+ssize_t zcache_eph_pageframes;
+ssize_t zcache_pers_pageframes;
 
-static inline unsigned long curr_pageframes_count(void)
-{
-	return zcache_pageframes_alloced -
-		atomic_read(&zcache_pageframes_freed_atomic) -
-		atomic_read(&zcache_eph_pageframes_atomic) -
-		atomic_read(&zcache_pers_pageframes_atomic);
-};
-/* but for the rest of these, counting races are ok */
+/* Used by this code. */
 static ssize_t zcache_flush_total;
 static ssize_t zcache_flush_found;
 static ssize_t zcache_flobj_total;
@@ -283,118 +162,6 @@ static ssize_t zcache_last_active_anon_pageframes;
 static ssize_t zcache_last_inactive_anon_pageframes;
 static ssize_t zcache_eph_nonactive_puts_ignored;
 static ssize_t zcache_pers_nonactive_puts_ignored;
-
-#ifdef CONFIG_DEBUG_FS
-#include <linux/debugfs.h>
-#define	zdfs	debugfs_create_size_t
-#define	zdfs64	debugfs_create_u64
-static int zcache_debugfs_init(void)
-{
-	struct dentry *root = debugfs_create_dir("zcache", NULL);
-	if (root == NULL)
-		return -ENXIO;
-
-	zdfs("obj_count", S_IRUGO, root, &zcache_obj_count);
-	zdfs("obj_count_max", S_IRUGO, root, &zcache_obj_count_max);
-	zdfs("objnode_count", S_IRUGO, root, &zcache_objnode_count);
-	zdfs("objnode_count_max", S_IRUGO, root, &zcache_objnode_count_max);
-	zdfs("flush_total", S_IRUGO, root, &zcache_flush_total);
-	zdfs("flush_found", S_IRUGO, root, &zcache_flush_found);
-	zdfs("flobj_total", S_IRUGO, root, &zcache_flobj_total);
-	zdfs("flobj_found", S_IRUGO, root, &zcache_flobj_found);
-	zdfs("failed_eph_puts", S_IRUGO, root, &zcache_failed_eph_puts);
-	zdfs("failed_pers_puts", S_IRUGO, root, &zcache_failed_pers_puts);
-	zdfs("failed_get_free_pages", S_IRUGO, root,
-				&zcache_failed_getfreepages);
-	zdfs("failed_alloc", S_IRUGO, root, &zcache_failed_alloc);
-	zdfs("put_to_flush", S_IRUGO, root, &zcache_put_to_flush);
-	zdfs("compress_poor", S_IRUGO, root, &zcache_compress_poor);
-	zdfs("mean_compress_poor", S_IRUGO, root, &zcache_mean_compress_poor);
-	zdfs("eph_ate_tail", S_IRUGO, root, &zcache_eph_ate_tail);
-	zdfs("eph_ate_tail_failed", S_IRUGO, root, &zcache_eph_ate_tail_failed);
-	zdfs("pers_ate_eph", S_IRUGO, root, &zcache_pers_ate_eph);
-	zdfs("pers_ate_eph_failed", S_IRUGO, root, &zcache_pers_ate_eph_failed);
-	zdfs("evicted_eph_zpages", S_IRUGO, root, &zcache_evicted_eph_zpages);
-	zdfs("evicted_eph_pageframes", S_IRUGO, root,
-				&zcache_evicted_eph_pageframes);
-	zdfs("eph_pageframes", S_IRUGO, root, &zcache_eph_pageframes);
-	zdfs("eph_pageframes_max", S_IRUGO, root, &zcache_eph_pageframes_max);
-	zdfs("pers_pageframes", S_IRUGO, root, &zcache_pers_pageframes);
-	zdfs("pers_pageframes_max", S_IRUGO, root, &zcache_pers_pageframes_max);
-	zdfs("eph_zpages", S_IRUGO, root, &zcache_eph_zpages);
-	zdfs("eph_zpages_max", S_IRUGO, root, &zcache_eph_zpages_max);
-	zdfs("pers_zpages", S_IRUGO, root, &zcache_pers_zpages);
-	zdfs("pers_zpages_max", S_IRUGO, root, &zcache_pers_zpages_max);
-	zdfs("last_active_file_pageframes", S_IRUGO, root,
-				&zcache_last_active_file_pageframes);
-	zdfs("last_inactive_file_pageframes", S_IRUGO, root,
-				&zcache_last_inactive_file_pageframes);
-	zdfs("last_active_anon_pageframes", S_IRUGO, root,
-				&zcache_last_active_anon_pageframes);
-	zdfs("last_inactive_anon_pageframes", S_IRUGO, root,
-				&zcache_last_inactive_anon_pageframes);
-	zdfs("eph_nonactive_puts_ignored", S_IRUGO, root,
-				&zcache_eph_nonactive_puts_ignored);
-	zdfs("pers_nonactive_puts_ignored", S_IRUGO, root,
-				&zcache_pers_nonactive_puts_ignored);
-	zdfs64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
-	zdfs64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
-	zdfs64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
-	zdfs64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
-	return 0;
-}
-#undef	zdebugfs
-#undef	zdfs64
-#endif
-
-/* developers can call this in case of ooms, e.g. to find memory leaks */
-void zcache_dump(void)
-{
-	pr_debug("zcache: obj_count=%u\n", zcache_obj_count);
-	pr_debug("zcache: obj_count_max=%u\n", zcache_obj_count_max);
-	pr_debug("zcache: objnode_count=%u\n", zcache_objnode_count);
-	pr_debug("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
-	pr_debug("zcache: flush_total=%u\n", zcache_flush_total);
-	pr_debug("zcache: flush_found=%u\n", zcache_flush_found);
-	pr_debug("zcache: flobj_total=%u\n", zcache_flobj_total);
-	pr_debug("zcache: flobj_found=%u\n", zcache_flobj_found);
-	pr_debug("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
-	pr_debug("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
-	pr_debug("zcache: failed_get_free_pages=%u\n",
-				zcache_failed_getfreepages);
-	pr_debug("zcache: failed_alloc=%u\n", zcache_failed_alloc);
-	pr_debug("zcache: put_to_flush=%u\n", zcache_put_to_flush);
-	pr_debug("zcache: compress_poor=%u\n", zcache_compress_poor);
-	pr_debug("zcache: mean_compress_poor=%u\n",
-				zcache_mean_compress_poor);
-	pr_debug("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
-	pr_debug("zcache: eph_ate_tail_failed=%u\n",
-				zcache_eph_ate_tail_failed);
-	pr_debug("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
-	pr_debug("zcache: pers_ate_eph_failed=%u\n",
-				zcache_pers_ate_eph_failed);
-	pr_debug("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
-	pr_debug("zcache: evicted_eph_pageframes=%u\n",
-				zcache_evicted_eph_pageframes);
-	pr_debug("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
-	pr_debug("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
-	pr_debug("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
-	pr_debug("zcache: pers_pageframes_max=%u\n",
-				zcache_pers_pageframes_max);
-	pr_debug("zcache: eph_zpages=%u\n", zcache_eph_zpages);
-	pr_debug("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
-	pr_debug("zcache: pers_zpages=%u\n", zcache_pers_zpages);
-	pr_debug("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
-	pr_debug("zcache: eph_zbytes=%llu\n",
-				(unsigned long long)zcache_eph_zbytes);
-	pr_debug("zcache: eph_zbytes_max=%llu\n",
-				(unsigned long long)zcache_eph_zbytes_max);
-	pr_debug("zcache: pers_zbytes=%llu\n",
-				(unsigned long long)zcache_pers_zbytes);
-	pr_debug("zcache: pers_zbytes_max=%llu\n",
-			(unsigned long long)zcache_pers_zbytes_max);
-}
-
 /*
  * zcache core code starts here
  */
-- 
1.7.7.6

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[PATCH 09/11] zcache: Use an array to initialize/use debugfs attributes.

[Konrad Rzeszutek Wilk]

It makes it neater and also allows us to piggyback on that
in the zcache_dump function.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/debug.c |  141 +++++++++++++--------------------------
 1 files changed, 47 insertions(+), 94 deletions(-)

diff --git a/drivers/staging/ramster/debug.c b/drivers/staging/ramster/debug.c
index 0d19715..3a252a5 100644
--- a/drivers/staging/ramster/debug.c
+++ b/drivers/staging/ramster/debug.c
@@ -3,111 +3,64 @@
 
 #ifdef CONFIG_DEBUG_FS
 #include <linux/debugfs.h>
-#define	zdfs	debugfs_create_size_t
-#define	zdfs64	debugfs_create_u64
+
+#define ATTR(x)  { .name = #x, .val = &zcache_##x, }
+static struct debug_entry {
+	const char *name;
+	ssize_t *val;
+} attrs[] = {
+	ATTR(obj_count), ATTR(obj_count_max),
+	ATTR(objnode_count), ATTR(objnode_count_max),
+	ATTR(flush_total), ATTR(flush_found),
+	ATTR(flobj_total), ATTR(flobj_found),
+	ATTR(failed_eph_puts), ATTR(failed_pers_puts),
+	ATTR(failed_getfreepages), ATTR(failed_alloc),
+	ATTR(put_to_flush),
+	ATTR(compress_poor), ATTR(mean_compress_poor),
+	ATTR(eph_ate_tail), ATTR(eph_ate_tail_failed),
+	ATTR(pers_ate_eph), ATTR(pers_ate_eph_failed),
+	ATTR(evicted_eph_zpages), ATTR(evicted_eph_pageframes),
+	ATTR(eph_pageframes), ATTR(eph_pageframes_max),
+	ATTR(eph_zpages), ATTR(eph_zpages_max),
+	ATTR(pers_zpages), ATTR(pers_zpages_max),
+	ATTR(last_active_file_pageframes),
+	ATTR(last_inactive_file_pageframes),
+	ATTR(last_active_anon_pageframes),
+	ATTR(last_inactive_anon_pageframes),
+	ATTR(eph_nonactive_puts_ignored),
+	ATTR(pers_nonactive_puts_ignored),
+};
+#undef ATTR
 int zcache_debugfs_init(void)
 {
+	unsigned int i;
 	struct dentry *root = debugfs_create_dir("zcache", NULL);
 	if (root == NULL)
 		return -ENXIO;
 
-	zdfs("obj_count", S_IRUGO, root, &zcache_obj_count);
-	zdfs("obj_count_max", S_IRUGO, root, &zcache_obj_count_max);
-	zdfs("objnode_count", S_IRUGO, root, &zcache_objnode_count);
-	zdfs("objnode_count_max", S_IRUGO, root, &zcache_objnode_count_max);
-	zdfs("flush_total", S_IRUGO, root, &zcache_flush_total);
-	zdfs("flush_found", S_IRUGO, root, &zcache_flush_found);
-	zdfs("flobj_total", S_IRUGO, root, &zcache_flobj_total);
-	zdfs("flobj_found", S_IRUGO, root, &zcache_flobj_found);
-	zdfs("failed_eph_puts", S_IRUGO, root, &zcache_failed_eph_puts);
-	zdfs("failed_pers_puts", S_IRUGO, root, &zcache_failed_pers_puts);
-	zdfs("failed_get_free_pages", S_IRUGO, root,
-				&zcache_failed_getfreepages);
-	zdfs("failed_alloc", S_IRUGO, root, &zcache_failed_alloc);
-	zdfs("put_to_flush", S_IRUGO, root, &zcache_put_to_flush);
-	zdfs("compress_poor", S_IRUGO, root, &zcache_compress_poor);
-	zdfs("mean_compress_poor", S_IRUGO, root, &zcache_mean_compress_poor);
-	zdfs("eph_ate_tail", S_IRUGO, root, &zcache_eph_ate_tail);
-	zdfs("eph_ate_tail_failed", S_IRUGO, root, &zcache_eph_ate_tail_failed);
-	zdfs("pers_ate_eph", S_IRUGO, root, &zcache_pers_ate_eph);
-	zdfs("pers_ate_eph_failed", S_IRUGO, root, &zcache_pers_ate_eph_failed);
-	zdfs("evicted_eph_zpages", S_IRUGO, root, &zcache_evicted_eph_zpages);
-	zdfs("evicted_eph_pageframes", S_IRUGO, root,
-				&zcache_evicted_eph_pageframes);
-	zdfs("eph_pageframes", S_IRUGO, root, &zcache_eph_pageframes);
-	zdfs("eph_pageframes_max", S_IRUGO, root, &zcache_eph_pageframes_max);
-	zdfs("pers_pageframes", S_IRUGO, root, &zcache_pers_pageframes);
-	zdfs("pers_pageframes_max", S_IRUGO, root, &zcache_pers_pageframes_max);
-	zdfs("eph_zpages", S_IRUGO, root, &zcache_eph_zpages);
-	zdfs("eph_zpages_max", S_IRUGO, root, &zcache_eph_zpages_max);
-	zdfs("pers_zpages", S_IRUGO, root, &zcache_pers_zpages);
-	zdfs("pers_zpages_max", S_IRUGO, root, &zcache_pers_zpages_max);
-	zdfs("last_active_file_pageframes", S_IRUGO, root,
-				&zcache_last_active_file_pageframes);
-	zdfs("last_inactive_file_pageframes", S_IRUGO, root,
-				&zcache_last_inactive_file_pageframes);
-	zdfs("last_active_anon_pageframes", S_IRUGO, root,
-				&zcache_last_active_anon_pageframes);
-	zdfs("last_inactive_anon_pageframes", S_IRUGO, root,
-				&zcache_last_inactive_anon_pageframes);
-	zdfs("eph_nonactive_puts_ignored", S_IRUGO, root,
-				&zcache_eph_nonactive_puts_ignored);
-	zdfs("pers_nonactive_puts_ignored", S_IRUGO, root,
-				&zcache_pers_nonactive_puts_ignored);
-	zdfs64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
-	zdfs64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
-	zdfs64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
-	zdfs64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
+	for (i = 0; i < ARRAY_SIZE(attrs); i++)
+		if (!debugfs_create_size_t(attrs[i].name, S_IRUGO, root, attrs[i].val))
+			goto out;
+
+	debugfs_create_u64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
+	debugfs_create_u64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
+	debugfs_create_u64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
+	debugfs_create_u64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
 	return 0;
+out:
+	return -ENODEV;
 }
-#undef	zdebugfs
-#undef	zdfs64
 
 /* developers can call this in case of ooms, e.g. to find memory leaks */
 void zcache_dump(void)
 {
-	pr_debug("zcache: obj_count=%u\n", zcache_obj_count);
-	pr_debug("zcache: obj_count_max=%u\n", zcache_obj_count_max);
-	pr_debug("zcache: objnode_count=%u\n", zcache_objnode_count);
-	pr_debug("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
-	pr_debug("zcache: flush_total=%u\n", zcache_flush_total);
-	pr_debug("zcache: flush_found=%u\n", zcache_flush_found);
-	pr_debug("zcache: flobj_total=%u\n", zcache_flobj_total);
-	pr_debug("zcache: flobj_found=%u\n", zcache_flobj_found);
-	pr_debug("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
-	pr_debug("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
-	pr_debug("zcache: failed_get_free_pages=%u\n",
-				zcache_failed_getfreepages);
-	pr_debug("zcache: failed_alloc=%u\n", zcache_failed_alloc);
-	pr_debug("zcache: put_to_flush=%u\n", zcache_put_to_flush);
-	pr_debug("zcache: compress_poor=%u\n", zcache_compress_poor);
-	pr_debug("zcache: mean_compress_poor=%u\n",
-				zcache_mean_compress_poor);
-	pr_debug("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
-	pr_debug("zcache: eph_ate_tail_failed=%u\n",
-				zcache_eph_ate_tail_failed);
-	pr_debug("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
-	pr_debug("zcache: pers_ate_eph_failed=%u\n",
-				zcache_pers_ate_eph_failed);
-	pr_debug("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
-	pr_debug("zcache: evicted_eph_pageframes=%u\n",
-				zcache_evicted_eph_pageframes);
-	pr_debug("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
-	pr_debug("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
-	pr_debug("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
-	pr_debug("zcache: pers_pageframes_max=%u\n",
-				zcache_pers_pageframes_max);
-	pr_debug("zcache: eph_zpages=%u\n", zcache_eph_zpages);
-	pr_debug("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
-	pr_debug("zcache: pers_zpages=%u\n", zcache_pers_zpages);
-	pr_debug("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
-	pr_debug("zcache: eph_zbytes=%llu\n",
-				(unsigned long long)zcache_eph_zbytes);
-	pr_debug("zcache: eph_zbytes_max=%llu\n",
-				(unsigned long long)zcache_eph_zbytes_max);
-	pr_debug("zcache: pers_zbytes=%llu\n",
-				(unsigned long long)zcache_pers_zbytes);
-	pr_debug("zcache: pers_zbytes_max=%llu\n",
-			(unsigned long long)zcache_pers_zbytes_max);
+	unsigned int i;
+	for (i = 0; i < ARRAY_SIZE(attrs); i++)
+		pr_debug("zcache: %s=%u\n", attrs[i].name, *attrs[i].val);
+
+	pr_debug("zcache: eph_zbytes=%llu\n", (unsigned long long)zcache_eph_zbytes);
+	pr_debug("zcache: eph_zbytes_max=%llu\n", (unsigned long long)zcache_eph_zbytes_max);
+	pr_debug("zcache: pers_zbytes=%llu\n", (unsigned long long)zcache_pers_zbytes);
+	pr_debug("zcache: pers_zbytes_max=%llu\n", (unsigned long long)zcache_pers_zbytes_max);
 }
 #endif
-- 
1.7.7.6

[PATCH 09/11] zcache: Use an array to initialize/use debugfs attributes.

[Konrad Rzeszutek Wilk]

It makes it neater and also allows us to piggyback on that
in the zcache_dump function.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/debug.c |  141 +++++++++++++--------------------------
 1 files changed, 47 insertions(+), 94 deletions(-)

diff --git a/drivers/staging/ramster/debug.c b/drivers/staging/ramster/debug.c
index 0d19715..3a252a5 100644
--- a/drivers/staging/ramster/debug.c
+++ b/drivers/staging/ramster/debug.c
@@ -3,111 +3,64 @@
 
 #ifdef CONFIG_DEBUG_FS
 #include <linux/debugfs.h>
-#define	zdfs	debugfs_create_size_t
-#define	zdfs64	debugfs_create_u64
+
+#define ATTR(x)  { .name = #x, .val = &zcache_##x, }
+static struct debug_entry {
+	const char *name;
+	ssize_t *val;
+} attrs[] = {
+	ATTR(obj_count), ATTR(obj_count_max),
+	ATTR(objnode_count), ATTR(objnode_count_max),
+	ATTR(flush_total), ATTR(flush_found),
+	ATTR(flobj_total), ATTR(flobj_found),
+	ATTR(failed_eph_puts), ATTR(failed_pers_puts),
+	ATTR(failed_getfreepages), ATTR(failed_alloc),
+	ATTR(put_to_flush),
+	ATTR(compress_poor), ATTR(mean_compress_poor),
+	ATTR(eph_ate_tail), ATTR(eph_ate_tail_failed),
+	ATTR(pers_ate_eph), ATTR(pers_ate_eph_failed),
+	ATTR(evicted_eph_zpages), ATTR(evicted_eph_pageframes),
+	ATTR(eph_pageframes), ATTR(eph_pageframes_max),
+	ATTR(eph_zpages), ATTR(eph_zpages_max),
+	ATTR(pers_zpages), ATTR(pers_zpages_max),
+	ATTR(last_active_file_pageframes),
+	ATTR(last_inactive_file_pageframes),
+	ATTR(last_active_anon_pageframes),
+	ATTR(last_inactive_anon_pageframes),
+	ATTR(eph_nonactive_puts_ignored),
+	ATTR(pers_nonactive_puts_ignored),
+};
+#undef ATTR
 int zcache_debugfs_init(void)
 {
+	unsigned int i;
 	struct dentry *root = debugfs_create_dir("zcache", NULL);
 	if (root == NULL)
 		return -ENXIO;
 
-	zdfs("obj_count", S_IRUGO, root, &zcache_obj_count);
-	zdfs("obj_count_max", S_IRUGO, root, &zcache_obj_count_max);
-	zdfs("objnode_count", S_IRUGO, root, &zcache_objnode_count);
-	zdfs("objnode_count_max", S_IRUGO, root, &zcache_objnode_count_max);
-	zdfs("flush_total", S_IRUGO, root, &zcache_flush_total);
-	zdfs("flush_found", S_IRUGO, root, &zcache_flush_found);
-	zdfs("flobj_total", S_IRUGO, root, &zcache_flobj_total);
-	zdfs("flobj_found", S_IRUGO, root, &zcache_flobj_found);
-	zdfs("failed_eph_puts", S_IRUGO, root, &zcache_failed_eph_puts);
-	zdfs("failed_pers_puts", S_IRUGO, root, &zcache_failed_pers_puts);
-	zdfs("failed_get_free_pages", S_IRUGO, root,
-				&zcache_failed_getfreepages);
-	zdfs("failed_alloc", S_IRUGO, root, &zcache_failed_alloc);
-	zdfs("put_to_flush", S_IRUGO, root, &zcache_put_to_flush);
-	zdfs("compress_poor", S_IRUGO, root, &zcache_compress_poor);
-	zdfs("mean_compress_poor", S_IRUGO, root, &zcache_mean_compress_poor);
-	zdfs("eph_ate_tail", S_IRUGO, root, &zcache_eph_ate_tail);
-	zdfs("eph_ate_tail_failed", S_IRUGO, root, &zcache_eph_ate_tail_failed);
-	zdfs("pers_ate_eph", S_IRUGO, root, &zcache_pers_ate_eph);
-	zdfs("pers_ate_eph_failed", S_IRUGO, root, &zcache_pers_ate_eph_failed);
-	zdfs("evicted_eph_zpages", S_IRUGO, root, &zcache_evicted_eph_zpages);
-	zdfs("evicted_eph_pageframes", S_IRUGO, root,
-				&zcache_evicted_eph_pageframes);
-	zdfs("eph_pageframes", S_IRUGO, root, &zcache_eph_pageframes);
-	zdfs("eph_pageframes_max", S_IRUGO, root, &zcache_eph_pageframes_max);
-	zdfs("pers_pageframes", S_IRUGO, root, &zcache_pers_pageframes);
-	zdfs("pers_pageframes_max", S_IRUGO, root, &zcache_pers_pageframes_max);
-	zdfs("eph_zpages", S_IRUGO, root, &zcache_eph_zpages);
-	zdfs("eph_zpages_max", S_IRUGO, root, &zcache_eph_zpages_max);
-	zdfs("pers_zpages", S_IRUGO, root, &zcache_pers_zpages);
-	zdfs("pers_zpages_max", S_IRUGO, root, &zcache_pers_zpages_max);
-	zdfs("last_active_file_pageframes", S_IRUGO, root,
-				&zcache_last_active_file_pageframes);
-	zdfs("last_inactive_file_pageframes", S_IRUGO, root,
-				&zcache_last_inactive_file_pageframes);
-	zdfs("last_active_anon_pageframes", S_IRUGO, root,
-				&zcache_last_active_anon_pageframes);
-	zdfs("last_inactive_anon_pageframes", S_IRUGO, root,
-				&zcache_last_inactive_anon_pageframes);
-	zdfs("eph_nonactive_puts_ignored", S_IRUGO, root,
-				&zcache_eph_nonactive_puts_ignored);
-	zdfs("pers_nonactive_puts_ignored", S_IRUGO, root,
-				&zcache_pers_nonactive_puts_ignored);
-	zdfs64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
-	zdfs64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
-	zdfs64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
-	zdfs64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
+	for (i = 0; i < ARRAY_SIZE(attrs); i++)
+		if (!debugfs_create_size_t(attrs[i].name, S_IRUGO, root, attrs[i].val))
+			goto out;
+
+	debugfs_create_u64("eph_zbytes", S_IRUGO, root, &zcache_eph_zbytes);
+	debugfs_create_u64("eph_zbytes_max", S_IRUGO, root, &zcache_eph_zbytes_max);
+	debugfs_create_u64("pers_zbytes", S_IRUGO, root, &zcache_pers_zbytes);
+	debugfs_create_u64("pers_zbytes_max", S_IRUGO, root, &zcache_pers_zbytes_max);
 	return 0;
+out:
+	return -ENODEV;
 }
-#undef	zdebugfs
-#undef	zdfs64
 
 /* developers can call this in case of ooms, e.g. to find memory leaks */
 void zcache_dump(void)
 {
-	pr_debug("zcache: obj_count=%u\n", zcache_obj_count);
-	pr_debug("zcache: obj_count_max=%u\n", zcache_obj_count_max);
-	pr_debug("zcache: objnode_count=%u\n", zcache_objnode_count);
-	pr_debug("zcache: objnode_count_max=%u\n", zcache_objnode_count_max);
-	pr_debug("zcache: flush_total=%u\n", zcache_flush_total);
-	pr_debug("zcache: flush_found=%u\n", zcache_flush_found);
-	pr_debug("zcache: flobj_total=%u\n", zcache_flobj_total);
-	pr_debug("zcache: flobj_found=%u\n", zcache_flobj_found);
-	pr_debug("zcache: failed_eph_puts=%u\n", zcache_failed_eph_puts);
-	pr_debug("zcache: failed_pers_puts=%u\n", zcache_failed_pers_puts);
-	pr_debug("zcache: failed_get_free_pages=%u\n",
-				zcache_failed_getfreepages);
-	pr_debug("zcache: failed_alloc=%u\n", zcache_failed_alloc);
-	pr_debug("zcache: put_to_flush=%u\n", zcache_put_to_flush);
-	pr_debug("zcache: compress_poor=%u\n", zcache_compress_poor);
-	pr_debug("zcache: mean_compress_poor=%u\n",
-				zcache_mean_compress_poor);
-	pr_debug("zcache: eph_ate_tail=%u\n", zcache_eph_ate_tail);
-	pr_debug("zcache: eph_ate_tail_failed=%u\n",
-				zcache_eph_ate_tail_failed);
-	pr_debug("zcache: pers_ate_eph=%u\n", zcache_pers_ate_eph);
-	pr_debug("zcache: pers_ate_eph_failed=%u\n",
-				zcache_pers_ate_eph_failed);
-	pr_debug("zcache: evicted_eph_zpages=%u\n", zcache_evicted_eph_zpages);
-	pr_debug("zcache: evicted_eph_pageframes=%u\n",
-				zcache_evicted_eph_pageframes);
-	pr_debug("zcache: eph_pageframes=%u\n", zcache_eph_pageframes);
-	pr_debug("zcache: eph_pageframes_max=%u\n", zcache_eph_pageframes_max);
-	pr_debug("zcache: pers_pageframes=%u\n", zcache_pers_pageframes);
-	pr_debug("zcache: pers_pageframes_max=%u\n",
-				zcache_pers_pageframes_max);
-	pr_debug("zcache: eph_zpages=%u\n", zcache_eph_zpages);
-	pr_debug("zcache: eph_zpages_max=%u\n", zcache_eph_zpages_max);
-	pr_debug("zcache: pers_zpages=%u\n", zcache_pers_zpages);
-	pr_debug("zcache: pers_zpages_max=%u\n", zcache_pers_zpages_max);
-	pr_debug("zcache: eph_zbytes=%llu\n",
-				(unsigned long long)zcache_eph_zbytes);
-	pr_debug("zcache: eph_zbytes_max=%llu\n",
-				(unsigned long long)zcache_eph_zbytes_max);
-	pr_debug("zcache: pers_zbytes=%llu\n",
-				(unsigned long long)zcache_pers_zbytes);
-	pr_debug("zcache: pers_zbytes_max=%llu\n",
-			(unsigned long long)zcache_pers_zbytes_max);
+	unsigned int i;
+	for (i = 0; i < ARRAY_SIZE(attrs); i++)
+		pr_debug("zcache: %s=%u\n", attrs[i].name, *attrs[i].val);
+
+	pr_debug("zcache: eph_zbytes=%llu\n", (unsigned long long)zcache_eph_zbytes);
+	pr_debug("zcache: eph_zbytes_max=%llu\n", (unsigned long long)zcache_eph_zbytes_max);
+	pr_debug("zcache: pers_zbytes=%llu\n", (unsigned long long)zcache_pers_zbytes);
+	pr_debug("zcache: pers_zbytes_max=%llu\n", (unsigned long long)zcache_pers_zbytes_max);
 }
 #endif
-- 
1.7.7.6

--
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[PATCH 10/11] zcache: Move the last of the debugfs counters out

[Konrad Rzeszutek Wilk]

We now have in zcache-main only the counters that are
are not debugfs related.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/debug.h       |   80 +++++++++++++++++++++++++--------
 drivers/staging/ramster/zcache-main.c |   71 +++++++++++------------------
 2 files changed, 87 insertions(+), 64 deletions(-)

diff --git a/drivers/staging/ramster/debug.h b/drivers/staging/ramster/debug.h
index 496735b..35af06d 100644
--- a/drivers/staging/ramster/debug.h
+++ b/drivers/staging/ramster/debug.h
@@ -128,29 +128,51 @@ static inline unsigned long curr_pageframes_count(void)
 		atomic_read(&zcache_pers_pageframes_atomic);
 };
 /* but for the rest of these, counting races are ok */
-extern ssize_t zcache_flush_total;
-extern ssize_t zcache_flush_found;
-extern ssize_t zcache_flobj_total;
-extern ssize_t zcache_flobj_found;
-extern ssize_t zcache_failed_eph_puts;
-extern ssize_t zcache_failed_pers_puts;
-extern ssize_t zcache_failed_getfreepages;
-extern ssize_t zcache_failed_alloc;
-extern ssize_t zcache_put_to_flush;
-extern ssize_t zcache_compress_poor;
-extern ssize_t zcache_mean_compress_poor;
-extern ssize_t zcache_eph_ate_tail;
-extern ssize_t zcache_eph_ate_tail_failed;
-extern ssize_t zcache_pers_ate_eph;
-extern ssize_t zcache_pers_ate_eph_failed;
-extern ssize_t zcache_evicted_eph_zpages;
-extern ssize_t zcache_evicted_eph_pageframes;
+static ssize_t zcache_flush_total;
+static ssize_t zcache_flush_found;
+static ssize_t zcache_flobj_total;
+static ssize_t zcache_flobj_found;
+static ssize_t zcache_failed_eph_puts;
+static ssize_t zcache_failed_pers_puts;
+static ssize_t zcache_failed_getfreepages;
+static ssize_t zcache_failed_alloc;
+static ssize_t zcache_put_to_flush;
+static ssize_t zcache_compress_poor;
+static ssize_t zcache_mean_compress_poor;
+static ssize_t zcache_eph_ate_tail;
+static ssize_t zcache_eph_ate_tail_failed;
+static ssize_t zcache_pers_ate_eph;
+static ssize_t zcache_pers_ate_eph_failed;
+static ssize_t zcache_evicted_eph_zpages;
+static ssize_t zcache_evicted_eph_pageframes;
+
 extern ssize_t zcache_last_active_file_pageframes;
 extern ssize_t zcache_last_inactive_file_pageframes;
 extern ssize_t zcache_last_active_anon_pageframes;
 extern ssize_t zcache_last_inactive_anon_pageframes;
-extern ssize_t zcache_eph_nonactive_puts_ignored;
-extern ssize_t zcache_pers_nonactive_puts_ignored;
+static ssize_t zcache_eph_nonactive_puts_ignored;
+static ssize_t zcache_pers_nonactive_puts_ignored;
+
+static inline void inc_zcache_flush_total(void) { zcache_flush_total ++; };
+static inline void inc_zcache_flush_found(void) { zcache_flush_found ++; };
+static inline void inc_zcache_flobj_total(void) { zcache_flobj_total ++; };
+static inline void inc_zcache_flobj_found(void) { zcache_flobj_found ++; };
+static inline void inc_zcache_failed_eph_puts(void) { zcache_failed_eph_puts ++; };
+static inline void inc_zcache_failed_pers_puts(void) { zcache_failed_pers_puts ++; };
+static inline void inc_zcache_failed_getfreepages(void) { zcache_failed_getfreepages ++; };
+static inline void inc_zcache_failed_alloc(void) { zcache_failed_alloc ++; };
+static inline void inc_zcache_put_to_flush(void) { zcache_put_to_flush ++; };
+static inline void inc_zcache_compress_poor(void) { zcache_compress_poor ++; };
+static inline void inc_zcache_mean_compress_poor(void) { zcache_mean_compress_poor ++; };
+static inline void inc_zcache_eph_ate_tail(void) { zcache_eph_ate_tail ++; };
+static inline void inc_zcache_eph_ate_tail_failed(void) { zcache_eph_ate_tail_failed ++; };
+static inline void inc_zcache_pers_ate_eph(void) { zcache_pers_ate_eph ++; };
+static inline void inc_zcache_pers_ate_eph_failed(void) { zcache_pers_ate_eph_failed ++; };
+static inline void inc_zcache_evicted_eph_zpages(void) { zcache_evicted_eph_zpages ++; };
+static inline void inc_zcache_evicted_eph_pageframes(void) { zcache_evicted_eph_pageframes ++; };
+
+static inline void inc_zcache_eph_nonactive_puts_ignored(void) { zcache_eph_nonactive_puts_ignored ++; };
+static inline void inc_zcache_pers_nonactive_puts_ignored(void) { zcache_pers_nonactive_puts_ignored ++; };
 
 int zcache_debugfs_init(void);
 #else
@@ -180,4 +202,24 @@ static inline int zcache_debugfs_init(void)
 {
 	return 0;
 };
+static inline void inc_zcache_flush_total(void) { };
+static inline void inc_zcache_flush_found(void) { };
+static inline void inc_zcache_flobj_total(void) { };
+static inline void inc_zcache_flobj_found(void) { };
+static inline void inc_zcache_failed_eph_puts(void) { };
+static inline void inc_zcache_failed_pers_puts(void) { };
+static inline void inc_zcache_failed_getfreepages(void) { };
+static inline void inc_zcache_failed_alloc(void) { };
+static inline void inc_zcache_put_to_flush(void) { };
+static inline void inc_zcache_compress_poor(void) { };
+static inline void inc_zcache_mean_compress_poor(void) { };
+static inline void inc_zcache_eph_ate_tail(void) { };
+static inline void inc_zcache_eph_ate_tail_failed(void) { };
+static inline void inc_zcache_pers_ate_eph(void) { };
+static inline void inc_zcache_pers_ate_eph_failed(void) { };
+static inline void inc_zcache_evicted_eph_zpages(void) { };
+static inline void inc_zcache_evicted_eph_pageframes(void) { };
+
+static inline void inc_zcache_eph_nonactive_puts_ignored(void) { };
+static inline void inc_zcache_pers_nonactive_puts_ignored(void) { };
 #endif
diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 013bfa4..d91868d 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -139,29 +139,10 @@ ssize_t zcache_eph_pageframes;
 ssize_t zcache_pers_pageframes;
 
 /* Used by this code. */
-static ssize_t zcache_flush_total;
-static ssize_t zcache_flush_found;
-static ssize_t zcache_flobj_total;
-static ssize_t zcache_flobj_found;
-static ssize_t zcache_failed_eph_puts;
-static ssize_t zcache_failed_pers_puts;
-static ssize_t zcache_failed_getfreepages;
-static ssize_t zcache_failed_alloc;
-static ssize_t zcache_put_to_flush;
-static ssize_t zcache_compress_poor;
-static ssize_t zcache_mean_compress_poor;
-static ssize_t zcache_eph_ate_tail;
-static ssize_t zcache_eph_ate_tail_failed;
-static ssize_t zcache_pers_ate_eph;
-static ssize_t zcache_pers_ate_eph_failed;
-static ssize_t zcache_evicted_eph_zpages;
-static ssize_t zcache_evicted_eph_pageframes;
-static ssize_t zcache_last_active_file_pageframes;
-static ssize_t zcache_last_inactive_file_pageframes;
-static ssize_t zcache_last_active_anon_pageframes;
-static ssize_t zcache_last_inactive_anon_pageframes;
-static ssize_t zcache_eph_nonactive_puts_ignored;
-static ssize_t zcache_pers_nonactive_puts_ignored;
+ssize_t zcache_last_active_file_pageframes;
+ssize_t zcache_last_inactive_file_pageframes;
+ssize_t zcache_last_active_anon_pageframes;
+ssize_t zcache_last_inactive_anon_pageframes;
 /*
  * zcache core code starts here
  */
@@ -354,7 +335,7 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw,
 	if (!raw) {
 		zcache_compress(page, &cdata, &clen);
 		if (clen > zbud_max_buddy_size()) {
-			zcache_compress_poor++;
+			inc_zcache_compress_poor();
 			goto out;
 		}
 	} else {
@@ -371,14 +352,14 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw,
 	if (newpage != NULL)
 		goto create_in_new_page;
 
-	zcache_failed_getfreepages++;
+	inc_zcache_failed_getfreepages();
 	/* can't allocate a page, evict an ephemeral page via LRU */
 	newpage = zcache_evict_eph_pageframe();
 	if (newpage == NULL) {
-		zcache_eph_ate_tail_failed++;
+		inc_zcache_eph_ate_tail_failed();
 		goto out;
 	}
-	zcache_eph_ate_tail++;
+	inc_zcache_eph_ate_tail();
 
 create_in_new_page:
 	pampd = (void *)zbud_create_prep(th, true, cdata, clen, newpage);
@@ -413,7 +394,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw,
 		zcache_compress(page, &cdata, &clen);
 	/* reject if compression is too poor */
 	if (clen > zbud_max_zsize) {
-		zcache_compress_poor++;
+		inc_zcache_compress_poor();
 		goto out;
 	}
 	/* reject if mean compression is too poor */
@@ -424,7 +405,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw,
 		zbud_mean_zsize = div_u64(total_zsize,
 					curr_pers_zpages);
 		if (zbud_mean_zsize > zbud_max_mean_zsize) {
-			zcache_mean_compress_poor++;
+			inc_zcache_mean_compress_poor();
 			goto out;
 		}
 	}
@@ -445,14 +426,14 @@ create_pampd:
 	 * (global_page_state(NR_LRU_BASE + LRU_ACTIVE_FILE) +
 	 * global_page_state(NR_LRU_BASE + LRU_INACTIVE_FILE)))
 	 */
-	zcache_failed_getfreepages++;
+	inc_zcache_failed_getfreepages();
 	/* can't allocate a page, evict an ephemeral page via LRU */
 	newpage = zcache_evict_eph_pageframe();
 	if (newpage == NULL) {
-		zcache_pers_ate_eph_failed++;
+		inc_zcache_pers_ate_eph_failed();
 		goto out;
 	}
-	zcache_pers_ate_eph++;
+	inc_zcache_pers_ate_eph();
 
 create_in_new_page:
 	pampd = (void *)zbud_create_prep(th, false, cdata, clen, newpage);
@@ -492,7 +473,7 @@ void *zcache_pampd_create(char *data, unsigned int size, bool raw,
 			objnode = kmem_cache_alloc(zcache_objnode_cache,
 							ZCACHE_GFP_MASK);
 			if (unlikely(objnode == NULL)) {
-				zcache_failed_alloc++;
+				inc_zcache_failed_alloc();
 				goto out;
 			}
 			kp->objnodes[i] = objnode;
@@ -503,7 +484,7 @@ void *zcache_pampd_create(char *data, unsigned int size, bool raw,
 		kp->obj = obj;
 	}
 	if (unlikely(kp->obj == NULL)) {
-		zcache_failed_alloc++;
+		inc_zcache_failed_alloc();
 		goto out;
 	}
 	/*
@@ -781,9 +762,9 @@ static struct page *zcache_evict_eph_pageframe(void)
 		goto out;
 	dec_zcache_eph_zbytes(zsize);
 	dec_zcache_eph_zpages(zpages);
-	zcache_evicted_eph_zpages++;
+	inc_zcache_evicted_eph_zpages();
 	dec_zcache_eph_pageframes();
-	zcache_evicted_eph_pageframes++;
+	inc_zcache_evicted_eph_pageframes();
 out:
 	return page;
 }
@@ -976,9 +957,9 @@ int zcache_put_page(int cli_id, int pool_id, struct tmem_oid *oidp,
 		if (pampd == NULL) {
 			ret = -ENOMEM;
 			if (ephemeral)
-				zcache_failed_eph_puts++;
+				inc_zcache_failed_eph_puts();
 			else
-				zcache_failed_pers_puts++;
+				inc_zcache_failed_pers_puts();
 		} else {
 			if (ramster_enabled)
 				ramster_do_preload_flnode(pool);
@@ -988,7 +969,7 @@ int zcache_put_page(int cli_id, int pool_id, struct tmem_oid *oidp,
 		}
 		zcache_put_pool(pool);
 	} else {
-		zcache_put_to_flush++;
+		inc_zcache_put_to_flush();
 		if (ramster_enabled)
 			ramster_do_preload_flnode(pool);
 		if (atomic_read(&pool->obj_count) > 0)
@@ -1038,7 +1019,7 @@ int zcache_flush_page(int cli_id, int pool_id,
 	unsigned long flags;
 
 	local_irq_save(flags);
-	zcache_flush_total++;
+	inc_zcache_flush_total();
 	pool = zcache_get_pool_by_id(cli_id, pool_id);
 	if (ramster_enabled)
 		ramster_do_preload_flnode(pool);
@@ -1048,7 +1029,7 @@ int zcache_flush_page(int cli_id, int pool_id,
 		zcache_put_pool(pool);
 	}
 	if (ret >= 0)
-		zcache_flush_found++;
+		inc_zcache_flush_found();
 	local_irq_restore(flags);
 	return ret;
 }
@@ -1061,7 +1042,7 @@ int zcache_flush_object(int cli_id, int pool_id,
 	unsigned long flags;
 
 	local_irq_save(flags);
-	zcache_flobj_total++;
+	inc_zcache_flobj_total();
 	pool = zcache_get_pool_by_id(cli_id, pool_id);
 	if (ramster_enabled)
 		ramster_do_preload_flnode(pool);
@@ -1071,7 +1052,7 @@ int zcache_flush_object(int cli_id, int pool_id,
 		zcache_put_pool(pool);
 	}
 	if (ret >= 0)
-		zcache_flobj_found++;
+		inc_zcache_flobj_found();
 	local_irq_restore(flags);
 	return ret;
 }
@@ -1237,7 +1218,7 @@ static void zcache_cleancache_put_page(int pool_id,
 	struct tmem_oid oid = *(struct tmem_oid *)&key;
 
 	if (!disable_cleancache_ignore_nonactive && !PageWasActive(page)) {
-		zcache_eph_nonactive_puts_ignored++;
+		inc_zcache_eph_nonactive_puts_ignored();
 		return;
 	}
 	if (likely(ind == index))
@@ -1366,7 +1347,7 @@ static int zcache_frontswap_put_page(unsigned type, pgoff_t offset,
 
 	BUG_ON(!PageLocked(page));
 	if (!disable_frontswap_ignore_nonactive && !PageWasActive(page)) {
-		zcache_pers_nonactive_puts_ignored++;
+		inc_zcache_pers_nonactive_puts_ignored();
 		ret = -ERANGE;
 		goto out;
 	}
-- 
1.7.7.6

[PATCH 10/11] zcache: Move the last of the debugfs counters out

[Konrad Rzeszutek Wilk]

We now have in zcache-main only the counters that are
are not debugfs related.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/debug.h       |   80 +++++++++++++++++++++++++--------
 drivers/staging/ramster/zcache-main.c |   71 +++++++++++------------------
 2 files changed, 87 insertions(+), 64 deletions(-)

diff --git a/drivers/staging/ramster/debug.h b/drivers/staging/ramster/debug.h
index 496735b..35af06d 100644
--- a/drivers/staging/ramster/debug.h
+++ b/drivers/staging/ramster/debug.h
@@ -128,29 +128,51 @@ static inline unsigned long curr_pageframes_count(void)
 		atomic_read(&zcache_pers_pageframes_atomic);
 };
 /* but for the rest of these, counting races are ok */
-extern ssize_t zcache_flush_total;
-extern ssize_t zcache_flush_found;
-extern ssize_t zcache_flobj_total;
-extern ssize_t zcache_flobj_found;
-extern ssize_t zcache_failed_eph_puts;
-extern ssize_t zcache_failed_pers_puts;
-extern ssize_t zcache_failed_getfreepages;
-extern ssize_t zcache_failed_alloc;
-extern ssize_t zcache_put_to_flush;
-extern ssize_t zcache_compress_poor;
-extern ssize_t zcache_mean_compress_poor;
-extern ssize_t zcache_eph_ate_tail;
-extern ssize_t zcache_eph_ate_tail_failed;
-extern ssize_t zcache_pers_ate_eph;
-extern ssize_t zcache_pers_ate_eph_failed;
-extern ssize_t zcache_evicted_eph_zpages;
-extern ssize_t zcache_evicted_eph_pageframes;
+static ssize_t zcache_flush_total;
+static ssize_t zcache_flush_found;
+static ssize_t zcache_flobj_total;
+static ssize_t zcache_flobj_found;
+static ssize_t zcache_failed_eph_puts;
+static ssize_t zcache_failed_pers_puts;
+static ssize_t zcache_failed_getfreepages;
+static ssize_t zcache_failed_alloc;
+static ssize_t zcache_put_to_flush;
+static ssize_t zcache_compress_poor;
+static ssize_t zcache_mean_compress_poor;
+static ssize_t zcache_eph_ate_tail;
+static ssize_t zcache_eph_ate_tail_failed;
+static ssize_t zcache_pers_ate_eph;
+static ssize_t zcache_pers_ate_eph_failed;
+static ssize_t zcache_evicted_eph_zpages;
+static ssize_t zcache_evicted_eph_pageframes;
+
 extern ssize_t zcache_last_active_file_pageframes;
 extern ssize_t zcache_last_inactive_file_pageframes;
 extern ssize_t zcache_last_active_anon_pageframes;
 extern ssize_t zcache_last_inactive_anon_pageframes;
-extern ssize_t zcache_eph_nonactive_puts_ignored;
-extern ssize_t zcache_pers_nonactive_puts_ignored;
+static ssize_t zcache_eph_nonactive_puts_ignored;
+static ssize_t zcache_pers_nonactive_puts_ignored;
+
+static inline void inc_zcache_flush_total(void) { zcache_flush_total ++; };
+static inline void inc_zcache_flush_found(void) { zcache_flush_found ++; };
+static inline void inc_zcache_flobj_total(void) { zcache_flobj_total ++; };
+static inline void inc_zcache_flobj_found(void) { zcache_flobj_found ++; };
+static inline void inc_zcache_failed_eph_puts(void) { zcache_failed_eph_puts ++; };
+static inline void inc_zcache_failed_pers_puts(void) { zcache_failed_pers_puts ++; };
+static inline void inc_zcache_failed_getfreepages(void) { zcache_failed_getfreepages ++; };
+static inline void inc_zcache_failed_alloc(void) { zcache_failed_alloc ++; };
+static inline void inc_zcache_put_to_flush(void) { zcache_put_to_flush ++; };
+static inline void inc_zcache_compress_poor(void) { zcache_compress_poor ++; };
+static inline void inc_zcache_mean_compress_poor(void) { zcache_mean_compress_poor ++; };
+static inline void inc_zcache_eph_ate_tail(void) { zcache_eph_ate_tail ++; };
+static inline void inc_zcache_eph_ate_tail_failed(void) { zcache_eph_ate_tail_failed ++; };
+static inline void inc_zcache_pers_ate_eph(void) { zcache_pers_ate_eph ++; };
+static inline void inc_zcache_pers_ate_eph_failed(void) { zcache_pers_ate_eph_failed ++; };
+static inline void inc_zcache_evicted_eph_zpages(void) { zcache_evicted_eph_zpages ++; };
+static inline void inc_zcache_evicted_eph_pageframes(void) { zcache_evicted_eph_pageframes ++; };
+
+static inline void inc_zcache_eph_nonactive_puts_ignored(void) { zcache_eph_nonactive_puts_ignored ++; };
+static inline void inc_zcache_pers_nonactive_puts_ignored(void) { zcache_pers_nonactive_puts_ignored ++; };
 
 int zcache_debugfs_init(void);
 #else
@@ -180,4 +202,24 @@ static inline int zcache_debugfs_init(void)
 {
 	return 0;
 };
+static inline void inc_zcache_flush_total(void) { };
+static inline void inc_zcache_flush_found(void) { };
+static inline void inc_zcache_flobj_total(void) { };
+static inline void inc_zcache_flobj_found(void) { };
+static inline void inc_zcache_failed_eph_puts(void) { };
+static inline void inc_zcache_failed_pers_puts(void) { };
+static inline void inc_zcache_failed_getfreepages(void) { };
+static inline void inc_zcache_failed_alloc(void) { };
+static inline void inc_zcache_put_to_flush(void) { };
+static inline void inc_zcache_compress_poor(void) { };
+static inline void inc_zcache_mean_compress_poor(void) { };
+static inline void inc_zcache_eph_ate_tail(void) { };
+static inline void inc_zcache_eph_ate_tail_failed(void) { };
+static inline void inc_zcache_pers_ate_eph(void) { };
+static inline void inc_zcache_pers_ate_eph_failed(void) { };
+static inline void inc_zcache_evicted_eph_zpages(void) { };
+static inline void inc_zcache_evicted_eph_pageframes(void) { };
+
+static inline void inc_zcache_eph_nonactive_puts_ignored(void) { };
+static inline void inc_zcache_pers_nonactive_puts_ignored(void) { };
 #endif
diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index 013bfa4..d91868d 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -139,29 +139,10 @@ ssize_t zcache_eph_pageframes;
 ssize_t zcache_pers_pageframes;
 
 /* Used by this code. */
-static ssize_t zcache_flush_total;
-static ssize_t zcache_flush_found;
-static ssize_t zcache_flobj_total;
-static ssize_t zcache_flobj_found;
-static ssize_t zcache_failed_eph_puts;
-static ssize_t zcache_failed_pers_puts;
-static ssize_t zcache_failed_getfreepages;
-static ssize_t zcache_failed_alloc;
-static ssize_t zcache_put_to_flush;
-static ssize_t zcache_compress_poor;
-static ssize_t zcache_mean_compress_poor;
-static ssize_t zcache_eph_ate_tail;
-static ssize_t zcache_eph_ate_tail_failed;
-static ssize_t zcache_pers_ate_eph;
-static ssize_t zcache_pers_ate_eph_failed;
-static ssize_t zcache_evicted_eph_zpages;
-static ssize_t zcache_evicted_eph_pageframes;
-static ssize_t zcache_last_active_file_pageframes;
-static ssize_t zcache_last_inactive_file_pageframes;
-static ssize_t zcache_last_active_anon_pageframes;
-static ssize_t zcache_last_inactive_anon_pageframes;
-static ssize_t zcache_eph_nonactive_puts_ignored;
-static ssize_t zcache_pers_nonactive_puts_ignored;
+ssize_t zcache_last_active_file_pageframes;
+ssize_t zcache_last_inactive_file_pageframes;
+ssize_t zcache_last_active_anon_pageframes;
+ssize_t zcache_last_inactive_anon_pageframes;
 /*
  * zcache core code starts here
  */
@@ -354,7 +335,7 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw,
 	if (!raw) {
 		zcache_compress(page, &cdata, &clen);
 		if (clen > zbud_max_buddy_size()) {
-			zcache_compress_poor++;
+			inc_zcache_compress_poor();
 			goto out;
 		}
 	} else {
@@ -371,14 +352,14 @@ static void *zcache_pampd_eph_create(char *data, size_t size, bool raw,
 	if (newpage != NULL)
 		goto create_in_new_page;
 
-	zcache_failed_getfreepages++;
+	inc_zcache_failed_getfreepages();
 	/* can't allocate a page, evict an ephemeral page via LRU */
 	newpage = zcache_evict_eph_pageframe();
 	if (newpage == NULL) {
-		zcache_eph_ate_tail_failed++;
+		inc_zcache_eph_ate_tail_failed();
 		goto out;
 	}
-	zcache_eph_ate_tail++;
+	inc_zcache_eph_ate_tail();
 
 create_in_new_page:
 	pampd = (void *)zbud_create_prep(th, true, cdata, clen, newpage);
@@ -413,7 +394,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw,
 		zcache_compress(page, &cdata, &clen);
 	/* reject if compression is too poor */
 	if (clen > zbud_max_zsize) {
-		zcache_compress_poor++;
+		inc_zcache_compress_poor();
 		goto out;
 	}
 	/* reject if mean compression is too poor */
@@ -424,7 +405,7 @@ static void *zcache_pampd_pers_create(char *data, size_t size, bool raw,
 		zbud_mean_zsize = div_u64(total_zsize,
 					curr_pers_zpages);
 		if (zbud_mean_zsize > zbud_max_mean_zsize) {
-			zcache_mean_compress_poor++;
+			inc_zcache_mean_compress_poor();
 			goto out;
 		}
 	}
@@ -445,14 +426,14 @@ create_pampd:
 	 * (global_page_state(NR_LRU_BASE + LRU_ACTIVE_FILE) +
 	 * global_page_state(NR_LRU_BASE + LRU_INACTIVE_FILE)))
 	 */
-	zcache_failed_getfreepages++;
+	inc_zcache_failed_getfreepages();
 	/* can't allocate a page, evict an ephemeral page via LRU */
 	newpage = zcache_evict_eph_pageframe();
 	if (newpage == NULL) {
-		zcache_pers_ate_eph_failed++;
+		inc_zcache_pers_ate_eph_failed();
 		goto out;
 	}
-	zcache_pers_ate_eph++;
+	inc_zcache_pers_ate_eph();
 
 create_in_new_page:
 	pampd = (void *)zbud_create_prep(th, false, cdata, clen, newpage);
@@ -492,7 +473,7 @@ void *zcache_pampd_create(char *data, unsigned int size, bool raw,
 			objnode = kmem_cache_alloc(zcache_objnode_cache,
 							ZCACHE_GFP_MASK);
 			if (unlikely(objnode == NULL)) {
-				zcache_failed_alloc++;
+				inc_zcache_failed_alloc();
 				goto out;
 			}
 			kp->objnodes[i] = objnode;
@@ -503,7 +484,7 @@ void *zcache_pampd_create(char *data, unsigned int size, bool raw,
 		kp->obj = obj;
 	}
 	if (unlikely(kp->obj == NULL)) {
-		zcache_failed_alloc++;
+		inc_zcache_failed_alloc();
 		goto out;
 	}
 	/*
@@ -781,9 +762,9 @@ static struct page *zcache_evict_eph_pageframe(void)
 		goto out;
 	dec_zcache_eph_zbytes(zsize);
 	dec_zcache_eph_zpages(zpages);
-	zcache_evicted_eph_zpages++;
+	inc_zcache_evicted_eph_zpages();
 	dec_zcache_eph_pageframes();
-	zcache_evicted_eph_pageframes++;
+	inc_zcache_evicted_eph_pageframes();
 out:
 	return page;
 }
@@ -976,9 +957,9 @@ int zcache_put_page(int cli_id, int pool_id, struct tmem_oid *oidp,
 		if (pampd == NULL) {
 			ret = -ENOMEM;
 			if (ephemeral)
-				zcache_failed_eph_puts++;
+				inc_zcache_failed_eph_puts();
 			else
-				zcache_failed_pers_puts++;
+				inc_zcache_failed_pers_puts();
 		} else {
 			if (ramster_enabled)
 				ramster_do_preload_flnode(pool);
@@ -988,7 +969,7 @@ int zcache_put_page(int cli_id, int pool_id, struct tmem_oid *oidp,
 		}
 		zcache_put_pool(pool);
 	} else {
-		zcache_put_to_flush++;
+		inc_zcache_put_to_flush();
 		if (ramster_enabled)
 			ramster_do_preload_flnode(pool);
 		if (atomic_read(&pool->obj_count) > 0)
@@ -1038,7 +1019,7 @@ int zcache_flush_page(int cli_id, int pool_id,
 	unsigned long flags;
 
 	local_irq_save(flags);
-	zcache_flush_total++;
+	inc_zcache_flush_total();
 	pool = zcache_get_pool_by_id(cli_id, pool_id);
 	if (ramster_enabled)
 		ramster_do_preload_flnode(pool);
@@ -1048,7 +1029,7 @@ int zcache_flush_page(int cli_id, int pool_id,
 		zcache_put_pool(pool);
 	}
 	if (ret >= 0)
-		zcache_flush_found++;
+		inc_zcache_flush_found();
 	local_irq_restore(flags);
 	return ret;
 }
@@ -1061,7 +1042,7 @@ int zcache_flush_object(int cli_id, int pool_id,
 	unsigned long flags;
 
 	local_irq_save(flags);
-	zcache_flobj_total++;
+	inc_zcache_flobj_total();
 	pool = zcache_get_pool_by_id(cli_id, pool_id);
 	if (ramster_enabled)
 		ramster_do_preload_flnode(pool);
@@ -1071,7 +1052,7 @@ int zcache_flush_object(int cli_id, int pool_id,
 		zcache_put_pool(pool);
 	}
 	if (ret >= 0)
-		zcache_flobj_found++;
+		inc_zcache_flobj_found();
 	local_irq_restore(flags);
 	return ret;
 }
@@ -1237,7 +1218,7 @@ static void zcache_cleancache_put_page(int pool_id,
 	struct tmem_oid oid = *(struct tmem_oid *)&key;
 
 	if (!disable_cleancache_ignore_nonactive && !PageWasActive(page)) {
-		zcache_eph_nonactive_puts_ignored++;
+		inc_zcache_eph_nonactive_puts_ignored();
 		return;
 	}
 	if (likely(ind == index))
@@ -1366,7 +1347,7 @@ static int zcache_frontswap_put_page(unsigned type, pgoff_t offset,
 
 	BUG_ON(!PageLocked(page));
 	if (!disable_frontswap_ignore_nonactive && !PageWasActive(page)) {
-		zcache_pers_nonactive_puts_ignored++;
+		inc_zcache_pers_nonactive_puts_ignored();
 		ret = -ERANGE;
 		goto out;
 	}
-- 
1.7.7.6

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[PATCH 11/11] zcache: Coalesce all debug under CONFIG_ZCACHE2_DEBUG

[Konrad Rzeszutek Wilk]

and also define this extra attribute in the Kconfig entry.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/Kconfig       |    8 ++++++++
 drivers/staging/ramster/Makefile      |    2 +-
 drivers/staging/ramster/debug.h       |    2 +-
 drivers/staging/ramster/zcache-main.c |    8 +++-----
 4 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/ramster/Kconfig b/drivers/staging/ramster/Kconfig
index 9ce2590..24c8704 100644
--- a/drivers/staging/ramster/Kconfig
+++ b/drivers/staging/ramster/Kconfig
@@ -15,6 +15,14 @@ config ZCACHE2
 	  again in the future.  Until then, zcache2 is a single-node
 	  version of ramster.
 
+config ZCACHE2_DEBUG
+	bool "Enable debug statistics"
+	depends on DEBUG_FS && ZCACHE2
+	default n
+	help
+	  This is used to provide an debugfs directory with counters of
+	  how zcache2 is doing. You probably want to set this to 'N'.
+
 config RAMSTER
 	tristate "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
 	depends on CONFIGFS_FS && SYSFS && !HIGHMEM && ZCACHE2
diff --git a/drivers/staging/ramster/Makefile b/drivers/staging/ramster/Makefile
index 61f5050..d341a23 100644
--- a/drivers/staging/ramster/Makefile
+++ b/drivers/staging/ramster/Makefile
@@ -4,5 +4,5 @@ zcache-y	+=	ramster/ramster.o ramster/r2net.o
 zcache-y	+=	ramster/nodemanager.o ramster/tcp.o
 zcache-y	+=	ramster/heartbeat.o ramster/masklog.o
 endif
-zcache-y-$(CONFIG_ZCACHE_DEBUG)	+= debug.o
+zcache-y-$(CONFIG_ZCACHE2_DEBUG)	+= debug.o
 obj-$(CONFIG_MODULES)	+= zcache.o
diff --git a/drivers/staging/ramster/debug.h b/drivers/staging/ramster/debug.h
index 35af06d..51e3d74 100644
--- a/drivers/staging/ramster/debug.h
+++ b/drivers/staging/ramster/debug.h
@@ -1,4 +1,4 @@
-#ifdef CONFIG_ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE2_DEBUG
 
 /* we try to keep these statistics SMP-consistent */
 static ssize_t zcache_obj_count;
diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index d91868d..d58341a 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -308,7 +308,7 @@ static void zcache_free_page(struct page *page)
 		max_pageframes = curr_pageframes;
 	if (curr_pageframes < min_pageframes)
 		min_pageframes = curr_pageframes;
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE2_DEBUG
 	if (curr_pageframes > 2L || curr_pageframes < -2L) {
 		/* pr_info here */
 	}
@@ -1561,9 +1561,7 @@ static int zcache_init(void)
 		namestr = "ramster";
 		ramster_register_pamops(&zcache_pamops);
 	}
-#ifdef CONFIG_DEBUG_FS
 	zcache_debugfs_init();
-#endif
 	if (zcache_enabled) {
 		unsigned int cpu;
 
@@ -1603,7 +1601,7 @@ static int zcache_init(void)
 		old_ops = zcache_cleancache_register_ops();
 		pr_info("%s: cleancache enabled using kernel transcendent "
 			"memory and compression buddies\n", namestr);
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE2_DEBUG
 		pr_info("%s: cleancache: ignorenonactive = %d\n",
 			namestr, !disable_cleancache_ignore_nonactive);
 #endif
@@ -1618,7 +1616,7 @@ static int zcache_init(void)
 			frontswap_tmem_exclusive_gets(true);
 		pr_info("%s: frontswap enabled using kernel transcendent "
 			"memory and compression buddies\n", namestr);
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE2_DEBUG
 		pr_info("%s: frontswap: excl gets = %d active only = %d\n",
 			namestr, frontswap_has_exclusive_gets,
 			!disable_frontswap_ignore_nonactive);
-- 
1.7.7.6

[PATCH 11/11] zcache: Coalesce all debug under CONFIG_ZCACHE2_DEBUG

[Konrad Rzeszutek Wilk]

and also define this extra attribute in the Kconfig entry.

Signed-off-by: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
---
 drivers/staging/ramster/Kconfig       |    8 ++++++++
 drivers/staging/ramster/Makefile      |    2 +-
 drivers/staging/ramster/debug.h       |    2 +-
 drivers/staging/ramster/zcache-main.c |    8 +++-----
 4 files changed, 13 insertions(+), 7 deletions(-)

diff --git a/drivers/staging/ramster/Kconfig b/drivers/staging/ramster/Kconfig
index 9ce2590..24c8704 100644
--- a/drivers/staging/ramster/Kconfig
+++ b/drivers/staging/ramster/Kconfig
@@ -15,6 +15,14 @@ config ZCACHE2
 	  again in the future.  Until then, zcache2 is a single-node
 	  version of ramster.
 
+config ZCACHE2_DEBUG
+	bool "Enable debug statistics"
+	depends on DEBUG_FS && ZCACHE2
+	default n
+	help
+	  This is used to provide an debugfs directory with counters of
+	  how zcache2 is doing. You probably want to set this to 'N'.
+
 config RAMSTER
 	tristate "Cross-machine RAM capacity sharing, aka peer-to-peer tmem"
 	depends on CONFIGFS_FS && SYSFS && !HIGHMEM && ZCACHE2
diff --git a/drivers/staging/ramster/Makefile b/drivers/staging/ramster/Makefile
index 61f5050..d341a23 100644
--- a/drivers/staging/ramster/Makefile
+++ b/drivers/staging/ramster/Makefile
@@ -4,5 +4,5 @@ zcache-y	+=	ramster/ramster.o ramster/r2net.o
 zcache-y	+=	ramster/nodemanager.o ramster/tcp.o
 zcache-y	+=	ramster/heartbeat.o ramster/masklog.o
 endif
-zcache-y-$(CONFIG_ZCACHE_DEBUG)	+= debug.o
+zcache-y-$(CONFIG_ZCACHE2_DEBUG)	+= debug.o
 obj-$(CONFIG_MODULES)	+= zcache.o
diff --git a/drivers/staging/ramster/debug.h b/drivers/staging/ramster/debug.h
index 35af06d..51e3d74 100644
--- a/drivers/staging/ramster/debug.h
+++ b/drivers/staging/ramster/debug.h
@@ -1,4 +1,4 @@
-#ifdef CONFIG_ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE2_DEBUG
 
 /* we try to keep these statistics SMP-consistent */
 static ssize_t zcache_obj_count;
diff --git a/drivers/staging/ramster/zcache-main.c b/drivers/staging/ramster/zcache-main.c
index d91868d..d58341a 100644
--- a/drivers/staging/ramster/zcache-main.c
+++ b/drivers/staging/ramster/zcache-main.c
@@ -308,7 +308,7 @@ static void zcache_free_page(struct page *page)
 		max_pageframes = curr_pageframes;
 	if (curr_pageframes < min_pageframes)
 		min_pageframes = curr_pageframes;
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE2_DEBUG
 	if (curr_pageframes > 2L || curr_pageframes < -2L) {
 		/* pr_info here */
 	}
@@ -1561,9 +1561,7 @@ static int zcache_init(void)
 		namestr = "ramster";
 		ramster_register_pamops(&zcache_pamops);
 	}
-#ifdef CONFIG_DEBUG_FS
 	zcache_debugfs_init();
-#endif
 	if (zcache_enabled) {
 		unsigned int cpu;
 
@@ -1603,7 +1601,7 @@ static int zcache_init(void)
 		old_ops = zcache_cleancache_register_ops();
 		pr_info("%s: cleancache enabled using kernel transcendent "
 			"memory and compression buddies\n", namestr);
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE2_DEBUG
 		pr_info("%s: cleancache: ignorenonactive = %d\n",
 			namestr, !disable_cleancache_ignore_nonactive);
 #endif
@@ -1618,7 +1616,7 @@ static int zcache_init(void)
 			frontswap_tmem_exclusive_gets(true);
 		pr_info("%s: frontswap enabled using kernel transcendent "
 			"memory and compression buddies\n", namestr);
-#ifdef ZCACHE_DEBUG
+#ifdef CONFIG_ZCACHE2_DEBUG
 		pr_info("%s: frontswap: excl gets = %d active only = %d\n",
 			namestr, frontswap_has_exclusive_gets,
 			!disable_frontswap_ignore_nonactive);
-- 
1.7.7.6

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RE: [RFC PATCH] zcache2 cleanups (s/int/bool + debugfs movement).

[Dan Magenheimer]

> From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@oracle.com]
> Sent: Monday, November 05, 2012 7:37 AM
> To: linux-kernel@vger.kernel.org; sjenning@linux.vnet.ibm.com; dan.magenheimer@oracle.com;
> ngupta@vflare.org; minchan@kernel.org; rcj@linux.vnet.ibm.com; linux-mm@kvack.org;
> gregkh@linuxfoundation.org; devel@driverdev.osuosl.org
> Cc: akpm@linux-foundation.org
> Subject: [RFC PATCH] zcache2 cleanups (s/int/bool + debugfs movement).
> 
> Looking at the zcache2 code there were a couple of things that I thought
> would make sense to move out of the code. For one thing it makes it easier
> to read, and for anoter - it can be cleanly compiled out. It also allows
> to have a clean seperation of counters that we _need_ vs the optional ones.
> Which means that in the future we could get rid of the optional ones.
> 
> This patchset is based on the patchset that Dan sent out
> (https://lkml.org/lkml/2012/10/31/790). I've stuck
> them (and addressed some review comments) and put them in my branch:
> 
>  git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm.git devel/zcache.v3
> 
> I am going to repost the module loading some time later this week - Bob Liu had
> some comments that I want to address.
> 
> So back to this patchset - it fixes some outstanding compile warnings, cleans
> up some of the code, and rips out the debug counters out of zcache-main.c
> and sticks them in a debug.c file.
> 
> I was hoping it would end up with less code, but sadly it ended up with
> a bit more due to the empty non-debug functions.
> 
>  drivers/staging/ramster/Kconfig       |    8 +
>  drivers/staging/ramster/Makefile      |    1 +
>  drivers/staging/ramster/debug.c       |   66 ++++++
>  drivers/staging/ramster/debug.h       |  225 +++++++++++++++++++
>  drivers/staging/ramster/zcache-main.c |  384 ++++++++-------------------------
>  5 files changed, 389 insertions(+), 295 deletions(-)
> 
> Konrad Rzeszutek Wilk (11):
>       zcache2: s/int/bool/ on the various options.
>       zcache: Module license is defined twice.
>       zcache: Provide accessory functions for counter increase
>       zcache: Provide accessory functions for counter decrease.
>       zcache: The last of the atomic reads has now an accessory function.
>       zcache: Fix compile warnings due to usage of debugfs_create_size_t
>       zcache: Make the debug code use pr_debug
>       zcache: Move debugfs code out of zcache-main.c file.
>       zcache: Use an array to initialize/use debugfs attributes.
>       zcache: Move the last of the debugfs counters out
>       zcache: Coalesce all debug under CONFIG_ZCACHE2_DEBUG

FWIW, for all these patches, please add my:

Reviewed-by: Dan Magenheimer <dan.magenheimer@oracle.com>

RE: [RFC PATCH] zcache2 cleanups (s/int/bool + debugfs movement).

[Dan Magenheimer]

> From: Konrad Rzeszutek Wilk [mailto:konrad.wilk@oracle.com]
> Sent: Monday, November 05, 2012 7:37 AM
> To: linux-kernel@vger.kernel.org; sjenning@linux.vnet.ibm.com; dan.magenheimer@oracle.com;
> ngupta@vflare.org; minchan@kernel.org; rcj@linux.vnet.ibm.com; linux-mm@kvack.org;
> gregkh@linuxfoundation.org; devel@driverdev.osuosl.org
> Cc: akpm@linux-foundation.org
> Subject: [RFC PATCH] zcache2 cleanups (s/int/bool + debugfs movement).
> 
> Looking at the zcache2 code there were a couple of things that I thought
> would make sense to move out of the code. For one thing it makes it easier
> to read, and for anoter - it can be cleanly compiled out. It also allows
> to have a clean seperation of counters that we _need_ vs the optional ones.
> Which means that in the future we could get rid of the optional ones.
> 
> This patchset is based on the patchset that Dan sent out
> (https://lkml.org/lkml/2012/10/31/790). I've stuck
> them (and addressed some review comments) and put them in my branch:
> 
>  git://git.kernel.org/pub/scm/linux/kernel/git/konrad/mm.git devel/zcache.v3
> 
> I am going to repost the module loading some time later this week - Bob Liu had
> some comments that I want to address.
> 
> So back to this patchset - it fixes some outstanding compile warnings, cleans
> up some of the code, and rips out the debug counters out of zcache-main.c
> and sticks them in a debug.c file.
> 
> I was hoping it would end up with less code, but sadly it ended up with
> a bit more due to the empty non-debug functions.
> 
>  drivers/staging/ramster/Kconfig       |    8 +
>  drivers/staging/ramster/Makefile      |    1 +
>  drivers/staging/ramster/debug.c       |   66 ++++++
>  drivers/staging/ramster/debug.h       |  225 +++++++++++++++++++
>  drivers/staging/ramster/zcache-main.c |  384 ++++++++-------------------------
>  5 files changed, 389 insertions(+), 295 deletions(-)
> 
> Konrad Rzeszutek Wilk (11):
>       zcache2: s/int/bool/ on the various options.
>       zcache: Module license is defined twice.
>       zcache: Provide accessory functions for counter increase
>       zcache: Provide accessory functions for counter decrease.
>       zcache: The last of the atomic reads has now an accessory function.
>       zcache: Fix compile warnings due to usage of debugfs_create_size_t
>       zcache: Make the debug code use pr_debug
>       zcache: Move debugfs code out of zcache-main.c file.
>       zcache: Use an array to initialize/use debugfs attributes.
>       zcache: Move the last of the debugfs counters out
>       zcache: Coalesce all debug under CONFIG_ZCACHE2_DEBUG

FWIW, for all these patches, please add my:

Reviewed-by: Dan Magenheimer <dan.magenheimer@oracle.com>

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