p71924506
/
linux_old1
1
0
Fork 0
Code Issues Pull Requests Projects Releases Wiki Activity

mm/page_owner.c: reduce page_owner structure size 

Maximum page order can be at max 10 which can be accomodated in short
data type(2 bytes).  last_migrate_reason is defined as enum type whose
values can be accomodated in short data type (2 bytes).

Total structure size is currently 16 bytes but after changing structure
size it goes to 12 bytes.

Vlastimil said:
 "Looks like it works, so why not.
  Before:
  [    0.001000] allocated 50331648 bytes of page_ext
  After:
  [    0.001000] allocated 41943040 bytes of page_ext"

Link: http://lkml.kernel.org/r/1507623917-37991-1-git-send-email-ayush.m@samsung.com
Signed-off-by: Ayush Mittal <ayush.m@samsung.com>
Acked-by: Vlastimil Babka <vbabka@suse.cz>
Cc: Vinayak Menon <vinmenon@codeaurora.org>
Cc: Amit Sahrawat <a.sahrawat@samsung.com>
Cc: Vaneet Narang <v.narang@samsung.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
This commit is contained in:
Ayush Mittal 2017-11-15 17:34:30 -08:00 committed by Linus Torvalds
parent 5984af1082
commit 6b4c54e378
1 changed files with 2 additions and 2 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
mm/page_owner.c
View File

@ -20,9 +20,9 @@
#define PAGE_OWNER_STACK_DEPTH (16) #define PAGE_OWNER_STACK_DEPTH (16)
struct page_owner { struct page_owner {
unsigned int order; unsigned short order;
short last_migrate_reason;
gfp_t gfp_mask; gfp_t gfp_mask;
int last_migrate_reason;
depot_stack_handle_t handle; depot_stack_handle_t handle;
}; };