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| author | Kirill Tkhai <ktkhai@virtuozzo.com> | 2019-03-06 00:48:15 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2019-03-06 06:07:19 +0100 |
| commit | 060f005f074791ec15e3ea111a0b0cac28abab06 (patch) | |
| tree | 8f68427c8d8d5c4b1da2159d6da6a7142ba03d35 /Documentation/kref.txt | |
| parent | mm: ksm: do not block on page lock when searching stable tree (diff) | |
| download | linux-060f005f074791ec15e3ea111a0b0cac28abab06.tar.xz linux-060f005f074791ec15e3ea111a0b0cac28abab06.zip | |
mm/vmscan.c: do not allocate duplicate stack variables in shrink_page_list()
On path shrink_inactive_list() ---> shrink_page_list() we allocate stack
variables for the statistics twice. This is completely useless, and
this just consumes stack much more, then we really need.
The patch kills duplicate stack variables from shrink_page_list(), and
this reduce stack usage and object file size significantly:
Stack usage:
Before: vmscan.c:1122:22:shrink_page_list 648 static
After: vmscan.c:1122:22:shrink_page_list 616 static
Size of vmscan.o:
text data bss dec hex filename
Before: 56866 4720 128 61714 f112 mm/vmscan.o
After: 56770 4720 128 61618 f0b2 mm/vmscan.o
Link: http://lkml.kernel.org/r/154894900030.5211.12104993874109647641.stgit@localhost.localdomain
Signed-off-by: Kirill Tkhai <ktkhai@virtuozzo.com>
Reviewed-by: Daniel Jordan <daniel.m.jordan@oracle.com>
Reviewed-by: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Michal Hocko <mhocko@suse.com>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'Documentation/kref.txt')
0 files changed, 0 insertions, 0 deletions