* [RFC v3] arm:extend the reserved mrmory for initrd to be page aligned
@ 2014-09-16 1:34 ` Wang, Yalin
0 siblings, 0 replies; 4+ messages in thread
From: Wang, Yalin @ 2014-09-16 1:34 UTC (permalink / raw)
To: 'Will Deacon', 'linux-kernel@vger.kernel.org',
'linux-arm-kernel@lists.infradead.org',
'linux-mm@kvack.org',
'linux-arm-msm@vger.kernel.org',
'Russell King - ARM Linux'
this patch extend the start and end address of initrd to be page aligned,
so that we can free all memory including the un-page aligned head or tail
page of initrd, if the start or end address of initrd are not page
aligned, the page can't be freed by free_initrd_mem() function.
Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com>
---
arch/arm/mm/init.c | 5 +++++
arch/arm64/mm/init.c | 8 +++++++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 659c75d..9221645 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -636,6 +636,11 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (!keep_initrd) {
+ if (start == initrd_start)
+ start = round_down(start, PAGE_SIZE);
+ if (end == initrd_end)
+ end = round_up(end, PAGE_SIZE);
+
poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5472c24..c5512f6 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -334,8 +334,14 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
- if (!keep_initrd)
+ if (!keep_initrd) {
+ if (start == initrd_start)
+ start = round_down(start, PAGE_SIZE);
+ if (end == initrd_end)
+ end = round_up(end, PAGE_SIZE);
+
free_reserved_area((void *)start, (void *)end, 0, "initrd");
+ }
}
static int __init keepinitrd_setup(char *__unused)
--
2.1.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [RFC v3] arm:extend the reserved mrmory for initrd to be page aligned
@ 2014-09-16 1:34 ` Wang, Yalin
0 siblings, 0 replies; 4+ messages in thread
From: Wang, Yalin @ 2014-09-16 1:34 UTC (permalink / raw)
To: 'Will Deacon', 'linux-kernel@vger.kernel.org',
'linux-arm-kernel@lists.infradead.org',
'linux-mm@kvack.org',
'linux-arm-msm@vger.kernel.org',
'Russell King - ARM Linux'
this patch extend the start and end address of initrd to be page aligned,
so that we can free all memory including the un-page aligned head or tail
page of initrd, if the start or end address of initrd are not page
aligned, the page can't be freed by free_initrd_mem() function.
Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com>
---
arch/arm/mm/init.c | 5 +++++
arch/arm64/mm/init.c | 8 +++++++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 659c75d..9221645 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -636,6 +636,11 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (!keep_initrd) {
+ if (start == initrd_start)
+ start = round_down(start, PAGE_SIZE);
+ if (end == initrd_end)
+ end = round_up(end, PAGE_SIZE);
+
poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5472c24..c5512f6 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -334,8 +334,14 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
- if (!keep_initrd)
+ if (!keep_initrd) {
+ if (start == initrd_start)
+ start = round_down(start, PAGE_SIZE);
+ if (end == initrd_end)
+ end = round_up(end, PAGE_SIZE);
+
free_reserved_area((void *)start, (void *)end, 0, "initrd");
+ }
}
static int __init keepinitrd_setup(char *__unused)
--
2.1.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
* [RFC v3] arm:extend the reserved mrmory for initrd to be page aligned
@ 2014-09-16 1:34 ` Wang, Yalin
0 siblings, 0 replies; 4+ messages in thread
From: Wang, Yalin @ 2014-09-16 1:34 UTC (permalink / raw)
To: 'Will Deacon', 'linux-kernel@vger.kernel.org',
'linux-arm-kernel@lists.infradead.org',
'linux-mm@kvack.org',
'linux-arm-msm@vger.kernel.org',
'Russell King - ARM Linux'
this patch extend the start and end address of initrd to be page aligned,
so that we can free all memory including the un-page aligned head or tail
page of initrd, if the start or end address of initrd are not page
aligned, the page can't be freed by free_initrd_mem() function.
Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com>
---
arch/arm/mm/init.c | 5 +++++
arch/arm64/mm/init.c | 8 +++++++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 659c75d..9221645 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -636,6 +636,11 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (!keep_initrd) {
+ if (start == initrd_start)
+ start = round_down(start, PAGE_SIZE);
+ if (end == initrd_end)
+ end = round_up(end, PAGE_SIZE);
+
poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5472c24..c5512f6 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -334,8 +334,14 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
- if (!keep_initrd)
+ if (!keep_initrd) {
+ if (start == initrd_start)
+ start = round_down(start, PAGE_SIZE);
+ if (end == initrd_end)
+ end = round_up(end, PAGE_SIZE);
+
free_reserved_area((void *)start, (void *)end, 0, "initrd");
+ }
}
static int __init keepinitrd_setup(char *__unused)
--
2.1.0
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^ permalink raw reply related [flat|nested] 4+ messages in thread
* [RFC v3] arm:extend the reserved mrmory for initrd to be page aligned
@ 2014-09-16 1:34 ` Wang, Yalin
0 siblings, 0 replies; 4+ messages in thread
From: Wang, Yalin @ 2014-09-16 1:34 UTC (permalink / raw)
To: linux-arm-kernel
this patch extend the start and end address of initrd to be page aligned,
so that we can free all memory including the un-page aligned head or tail
page of initrd, if the start or end address of initrd are not page
aligned, the page can't be freed by free_initrd_mem() function.
Signed-off-by: Yalin Wang <yalin.wang@sonymobile.com>
---
arch/arm/mm/init.c | 5 +++++
arch/arm64/mm/init.c | 8 +++++++-
2 files changed, 12 insertions(+), 1 deletion(-)
diff --git a/arch/arm/mm/init.c b/arch/arm/mm/init.c
index 659c75d..9221645 100644
--- a/arch/arm/mm/init.c
+++ b/arch/arm/mm/init.c
@@ -636,6 +636,11 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
if (!keep_initrd) {
+ if (start == initrd_start)
+ start = round_down(start, PAGE_SIZE);
+ if (end == initrd_end)
+ end = round_up(end, PAGE_SIZE);
+
poison_init_mem((void *)start, PAGE_ALIGN(end) - start);
free_reserved_area((void *)start, (void *)end, -1, "initrd");
}
diff --git a/arch/arm64/mm/init.c b/arch/arm64/mm/init.c
index 5472c24..c5512f6 100644
--- a/arch/arm64/mm/init.c
+++ b/arch/arm64/mm/init.c
@@ -334,8 +334,14 @@ static int keep_initrd;
void free_initrd_mem(unsigned long start, unsigned long end)
{
- if (!keep_initrd)
+ if (!keep_initrd) {
+ if (start == initrd_start)
+ start = round_down(start, PAGE_SIZE);
+ if (end == initrd_end)
+ end = round_up(end, PAGE_SIZE);
+
free_reserved_area((void *)start, (void *)end, 0, "initrd");
+ }
}
static int __init keepinitrd_setup(char *__unused)
--
2.1.0
^ permalink raw reply related [flat|nested] 4+ messages in thread
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2014-09-16 1:34 [RFC v3] arm:extend the reserved mrmory for initrd to be page aligned Wang, Yalin
2014-09-16 1:34 ` Wang, Yalin
2014-09-16 1:34 ` Wang, Yalin
2014-09-16 1:34 ` Wang, Yalin
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