From: David Howells <dhowells@redhat.com>
To: linux-fsdevel@vger.kernel.org
Cc: linux-kernel@vger.kernel.org, linux-cachefs@redhat.com,
linux-nfs@vger.kernel.org
Subject: [PATCH 02/17] CacheFiles: Downgrade the requirements passed to the allocator
Date: Wed, 08 Feb 2012 21:17:01 +0000 [thread overview]
Message-ID: <20120208211701.15607.85808.stgit@warthog.procyon.org.uk> (raw)
In-Reply-To: <20120208211640.15607.58537.stgit@warthog.procyon.org.uk>
Downgrade the requirements passed to the allocator in the gfp flags parameter.
FS-Cache/CacheFiles can handle OOM conditions simply by aborting the attempt to
store an object or a page in the cache.
Signed-off-by: David Howells <dhowells@redhat.com>
---
fs/cachefiles/interface.c | 8 ++++----
fs/cachefiles/internal.h | 2 ++
fs/cachefiles/key.c | 2 +-
fs/cachefiles/rdwr.c | 18 ++++++++++--------
fs/cachefiles/xattr.c | 2 +-
fs/fscache/page.c | 2 +-
6 files changed, 19 insertions(+), 15 deletions(-)
diff --git a/fs/cachefiles/interface.c b/fs/cachefiles/interface.c
index 67bef6d..9bff0f8 100644
--- a/fs/cachefiles/interface.c
+++ b/fs/cachefiles/interface.c
@@ -41,12 +41,12 @@ static struct fscache_object *cachefiles_alloc_object(
_enter("{%s},%p,", cache->cache.identifier, cookie);
- lookup_data = kmalloc(sizeof(*lookup_data), GFP_KERNEL);
+ lookup_data = kmalloc(sizeof(*lookup_data), cachefiles_gfp);
if (!lookup_data)
goto nomem_lookup_data;
/* create a new object record and a temporary leaf image */
- object = kmem_cache_alloc(cachefiles_object_jar, GFP_KERNEL);
+ object = kmem_cache_alloc(cachefiles_object_jar, cachefiles_gfp);
if (!object)
goto nomem_object;
@@ -63,7 +63,7 @@ static struct fscache_object *cachefiles_alloc_object(
* - stick the length on the front and leave space on the back for the
* encoder
*/
- buffer = kmalloc((2 + 512) + 3, GFP_KERNEL);
+ buffer = kmalloc((2 + 512) + 3, cachefiles_gfp);
if (!buffer)
goto nomem_buffer;
@@ -219,7 +219,7 @@ static void cachefiles_update_object(struct fscache_object *_object)
return;
}
- auxdata = kmalloc(2 + 512 + 3, GFP_KERNEL);
+ auxdata = kmalloc(2 + 512 + 3, cachefiles_gfp);
if (!auxdata) {
_leave(" [nomem]");
return;
diff --git a/fs/cachefiles/internal.h b/fs/cachefiles/internal.h
index bd6bc1b..4938251 100644
--- a/fs/cachefiles/internal.h
+++ b/fs/cachefiles/internal.h
@@ -23,6 +23,8 @@ extern unsigned cachefiles_debug;
#define CACHEFILES_DEBUG_KLEAVE 2
#define CACHEFILES_DEBUG_KDEBUG 4
+#define cachefiles_gfp (__GFP_WAIT | __GFP_NORETRY | __GFP_NOMEMALLOC)
+
/*
* node records
*/
diff --git a/fs/cachefiles/key.c b/fs/cachefiles/key.c
index 81b8b2b..33b58c6 100644
--- a/fs/cachefiles/key.c
+++ b/fs/cachefiles/key.c
@@ -78,7 +78,7 @@ char *cachefiles_cook_key(const u8 *raw, int keylen, uint8_t type)
_debug("max: %d", max);
- key = kmalloc(max, GFP_KERNEL);
+ key = kmalloc(max, cachefiles_gfp);
if (!key)
return NULL;
diff --git a/fs/cachefiles/rdwr.c b/fs/cachefiles/rdwr.c
index 0186fc1..26a6f52 100644
--- a/fs/cachefiles/rdwr.c
+++ b/fs/cachefiles/rdwr.c
@@ -238,7 +238,7 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
_debug("read back %p{%lu,%d}",
netpage, netpage->index, page_count(netpage));
- monitor = kzalloc(sizeof(*monitor), GFP_KERNEL);
+ monitor = kzalloc(sizeof(*monitor), cachefiles_gfp);
if (!monitor)
goto nomem;
@@ -257,13 +257,14 @@ static int cachefiles_read_backing_file_one(struct cachefiles_object *object,
goto backing_page_already_present;
if (!newpage) {
- newpage = page_cache_alloc_cold(bmapping);
+ newpage = __page_cache_alloc(cachefiles_gfp |
+ __GFP_COLD);
if (!newpage)
goto nomem_monitor;
}
ret = add_to_page_cache(newpage, bmapping,
- netpage->index, GFP_KERNEL);
+ netpage->index, cachefiles_gfp);
if (ret == 0)
goto installed_new_backing_page;
if (ret != -EEXIST)
@@ -481,7 +482,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
netpage, netpage->index, page_count(netpage));
if (!monitor) {
- monitor = kzalloc(sizeof(*monitor), GFP_KERNEL);
+ monitor = kzalloc(sizeof(*monitor), cachefiles_gfp);
if (!monitor)
goto nomem;
@@ -496,13 +497,14 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
goto backing_page_already_present;
if (!newpage) {
- newpage = page_cache_alloc_cold(bmapping);
+ newpage = __page_cache_alloc(cachefiles_gfp |
+ __GFP_COLD);
if (!newpage)
goto nomem;
}
ret = add_to_page_cache(newpage, bmapping,
- netpage->index, GFP_KERNEL);
+ netpage->index, cachefiles_gfp);
if (ret == 0)
goto installed_new_backing_page;
if (ret != -EEXIST)
@@ -532,7 +534,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
_debug("- monitor add");
ret = add_to_page_cache(netpage, op->mapping, netpage->index,
- GFP_KERNEL);
+ cachefiles_gfp);
if (ret < 0) {
if (ret == -EEXIST) {
page_cache_release(netpage);
@@ -608,7 +610,7 @@ static int cachefiles_read_backing_file(struct cachefiles_object *object,
_debug("- uptodate");
ret = add_to_page_cache(netpage, op->mapping, netpage->index,
- GFP_KERNEL);
+ cachefiles_gfp);
if (ret < 0) {
if (ret == -EEXIST) {
page_cache_release(netpage);
diff --git a/fs/cachefiles/xattr.c b/fs/cachefiles/xattr.c
index e18b183..73b4628 100644
--- a/fs/cachefiles/xattr.c
+++ b/fs/cachefiles/xattr.c
@@ -174,7 +174,7 @@ int cachefiles_check_object_xattr(struct cachefiles_object *object,
ASSERT(dentry);
ASSERT(dentry->d_inode);
- auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, GFP_KERNEL);
+ auxbuf = kmalloc(sizeof(struct cachefiles_xattr) + 512, cachefiles_gfp);
if (!auxbuf) {
_leave(" = -ENOMEM");
return -ENOMEM;
diff --git a/fs/fscache/page.c b/fs/fscache/page.c
index d7c663c..248a12e 100644
--- a/fs/fscache/page.c
+++ b/fs/fscache/page.c
@@ -759,7 +759,7 @@ int __fscache_write_page(struct fscache_cookie *cookie,
fscache_stat(&fscache_n_stores);
- op = kzalloc(sizeof(*op), GFP_NOIO);
+ op = kzalloc(sizeof(*op), GFP_NOIO | __GFP_NOMEMALLOC | __GFP_NORETRY);
if (!op)
goto nomem;
next prev parent reply other threads:[~2012-02-08 21:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2012-02-08 21:16 [PATCH 00/17] Fix assorted FS-Cache problems David Howells
2012-02-08 21:16 ` [PATCH 01/17] CacheFiles: Fix the marking of cached pages David Howells
2012-02-08 21:17 ` David Howells [this message]
2012-02-08 21:17 ` [PATCH 03/17] FS-Cache: Check that there are no read ops when cookie relinquished David Howells
2012-02-08 21:17 ` [PATCH 04/17] CacheFiles: Make some debugging statements conditional David Howells
2012-02-08 21:17 ` [PATCH 05/17] FS-Cache: Make cookie relinquishment wait for outstanding reads David Howells
2012-02-08 21:17 ` [PATCH 06/17] FS-Cache: Fix operation state management and accounting David Howells
2012-02-08 21:17 ` [PATCH 07/17] FS-Cache: Provide proper invalidation David Howells
2012-02-08 21:18 ` [PATCH 08/17] VFS: Make more complete truncate operation available to CacheFiles David Howells
2012-02-08 21:18 ` [PATCH 09/17] CacheFiles: Implement invalidation David Howells
2012-02-08 21:18 ` [PATCH 10/17] NFS: Use FS-Cache invalidation David Howells
2012-02-08 21:18 ` [PATCH 11/17] CacheFiles: Add missing retrieval completions David Howells
2012-02-08 21:18 ` [PATCH 12/17] FS-Cache: Convert the object event ID #defines into an enum David Howells
2012-02-08 21:18 ` [PATCH 13/17] FS-Cache: Initialise the object event mask with the calculated mask David Howells
2012-02-08 21:19 ` [PATCH 14/17] FS-Cache: Don't mask off the object event mask when printing it David Howells
2012-02-08 21:19 ` [PATCH 15/17] FS-Cache: Limit the number of I/O error reports for a cache David Howells
2012-02-08 21:19 ` [PATCH 16/17] FS-Cache: Exclusive op submission can BUG if there's been an I/O error David Howells
2012-02-08 21:19 ` [PATCH 17/17] NFS: nfs_migrate_page() does not wait for FS-Cache to finish with a page David Howells
2012-07-21 16:57 ` Jonathan Nieder
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20120208211701.15607.85808.stgit@warthog.procyon.org.uk \
--to=dhowells@redhat.com \
--cc=linux-cachefs@redhat.com \
--cc=linux-fsdevel@vger.kernel.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-nfs@vger.kernel.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).