xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

mm/debug-pagealloc: make debug-pagealloc boottime configurable

Browse Source 
Now, we have prepared to avoid using debug-pagealloc in boottime.  So
introduce new kernel-parameter to disable debug-pagealloc in boottime, and
makes related functions to be disabled in this case.

Only non-intuitive part is change of guard page functions.  Because guard
page is effective only if debug-pagealloc is enabled, turning off
according to debug-pagealloc is reasonable thing to do.

Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Dave Hansen <dave@sr71.net>
Cc: Michal Nazarewicz <mina86@mina86.com>
Cc: Jungsoo Son <jungsoo.son@lge.com>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Joonsoo Kim
2014-12-12 16:55:52 -08:00
committed by Linus Torvalds
parent e30825f186
commit 031bc5743f
9 changed files with 57 additions and 7 deletions
Download Patch File Download Diff File Expand all files Collapse all files

8
mm/debug-pagealloc.c
View File

@@ -10,11 +10,17 @@ static bool page_poisoning_enabled __read_mostly;
static bool need_page_poisoning(void)
{
if (!debug_pagealloc_enabled())
return false;
return true;
}
static void init_page_poisoning(void)
{
if (!debug_pagealloc_enabled())
return;
page_poisoning_enabled = true;
}
@@ -119,7 +125,7 @@ static void unpoison_pages(struct page *page, int n)
unpoison_page(page + i);
}
void kernel_map_pages(struct page *page, int numpages, int enable)
void __kernel_map_pages(struct page *page, int numpages, int enable)
{
if (!page_poisoning_enabled)
return;