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mm/page_owner: introduce split_page_owner and replace manual handling

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split_page() calls set_page_owner() to set up page_owner to each pages.
But, it has a drawback that head page and the others have different
stacktrace because callsite of set_page_owner() is slightly differnt.
To avoid this problem, this patch copies head page's page_owner to the
others.  It needs to introduce new function, split_page_owner() but it
also remove the other function, get_page_owner_gfp() so looks good to
do.

Link: http://lkml.kernel.org/r/1464230275-25791-4-git-send-email-iamjoonsoo.kim@lge.com
Signed-off-by: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Mel Gorman <mgorman@techsingularity.net>
Cc: Minchan Kim <minchan@kernel.org>
Cc: Alexander Potapenko <glider@google.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Michal Hocko <mhocko@kernel.org>
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
2016-07-26 15:23:49 -07:00
committed by Linus Torvalds
parent a8efe1c982
commit a9627bc5e3
3 changed files with 15 additions and 21 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
include/linux/page_owner.h
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@@ -10,7 +10,7 @@ extern struct page_ext_operations page_owner_ops;
extern void __reset_page_owner(struct page *page, unsigned int order);
extern void __set_page_owner(struct page *page,
unsigned int order, gfp_t gfp_mask);
extern gfp_t __get_page_owner_gfp(struct page *page);
extern void __split_page_owner(struct page *page, unsigned int order);
extern void __copy_page_owner(struct page *oldpage, struct page *newpage);
extern void __set_page_owner_migrate_reason(struct page *page, int reason);
extern void __dump_page_owner(struct page *page);
@@ -28,12 +28,10 @@ static inline void set_page_owner(struct page *page,
__set_page_owner(page, order, gfp_mask);
}
static inline gfp_t get_page_owner_gfp(struct page *page)
static inline void split_page_owner(struct page *page, unsigned int order)
{
if (static_branch_unlikely(&page_owner_inited))
return __get_page_owner_gfp(page);
else
return 0;
__split_page_owner(page, order);
}
static inline void copy_page_owner(struct page *oldpage, struct page *newpage)
{
@@ -58,9 +56,9 @@ static inline void set_page_owner(struct page *page,
unsigned int order, gfp_t gfp_mask)
{
}
static inline gfp_t get_page_owner_gfp(struct page *page)
static inline void split_page_owner(struct page *page,
unsigned int order)
{
return 0;
}
static inline void copy_page_owner(struct page *oldpage, struct page *newpage)
{