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| author | Minchan Kim <minchan@kernel.org> | 2015-04-15 16:15:33 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-15 16:35:20 -0700 |
| commit | d3d07c92ff69f784bb8c3279fa87678bfa2f7f6f (patch) | |
| tree | ea13c63b576a82c469a5a0ef9c874f64964837a6 /mm/zsmalloc.c | |
| parent | 312fcae227037619dc858c9ccd362c7b847730a2 (diff) | |
| download | lwn-d3d07c92ff69f784bb8c3279fa87678bfa2f7f6f.tar.gz lwn-d3d07c92ff69f784bb8c3279fa87678bfa2f7f6f.zip | |
zsmalloc: adjust ZS_ALMOST_FULL
Curretly, zsmalloc regards a zspage as ZS_ALMOST_EMPTY if the zspage has
under 1/4 used objects(ie, fullness_threshold_frac). It could make result
in loose packing since zsmalloc migrates only ZS_ALMOST_EMPTY zspage out.
This patch changes the rule so that zsmalloc makes zspage which has above
3/4 used object ZS_ALMOST_FULL so it could make tight packing.
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Juneho Choi <juno.choi@lge.com>
Cc: Gunho Lee <gunho.lee@lge.com>
Cc: Luigi Semenzato <semenzato@google.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Seth Jennings <sjennings@variantweb.net>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Jerome Marchand <jmarchan@redhat.com>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Joonsoo Kim <iamjoonsoo.kim@lge.com>
Cc: Mel Gorman <mel@csn.ul.ie>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/zsmalloc.c')
| -rw-r--r-- | mm/zsmalloc.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index c4ae608dc725..3bd8b0a16462 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -480,7 +480,7 @@ static enum fullness_group get_fullness_group(struct page *page) fg = ZS_EMPTY; else if (inuse == max_objects) fg = ZS_FULL; - else if (inuse <= max_objects / fullness_threshold_frac) + else if (inuse <= 3 * max_objects / fullness_threshold_frac) fg = ZS_ALMOST_EMPTY; else fg = ZS_ALMOST_FULL; |