diff options
| author |   Minchan Kim <minchan@kernel.org> | 2015-04-15 16:16:18 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2015-04-15 16:35:22 -0700 |
| commit | 839373e645d12613308d9148041c4bd967bce8d5 (patch) | |
| tree | 79a29675e15f8eb8bd4fcca5f035a96b2154e049 /mm | |
| parent | zsmalloc: micro-optimize zs_object_copy() (diff) | |
| download | linux-dev-839373e645d12613308d9148041c4bd967bce8d5.tar.xz linux-dev-839373e645d12613308d9148041c4bd967bce8d5.zip | |
zsmalloc: remove unnecessary insertion/removal of zspage in compaction
In putback_zspage, we don't need to insert a zspage into list of zspage
in size_class again to just fix fullness group. We could do directly
without reinsertion so we could save some instuctions.
Reported-by: Heesub Shin <heesub.shin@samsung.com>
Signed-off-by: Minchan Kim <minchan@kernel.org>
Cc: Nitin Gupta <ngupta@vflare.org>
Cc: Sergey Senozhatsky <sergey.senozhatsky@gmail.com>
Cc: Dan Streetman <ddstreet@ieee.org>
Cc: Seth Jennings <sjennings@variantweb.net>
Cc: Ganesh Mahendran <opensource.ganesh@gmail.com>
Cc: Luigi Semenzato <semenzato@google.com>
Cc: Gunho Lee <gunho.lee@lge.com>
Cc: Juneho Choi <juno.choi@lge.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
| -rw-r--r-- | mm/zsmalloc.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c index a9a9ff233a13..ded3672295d7 100644 --- a/mm/zsmalloc.c +++ b/mm/zsmalloc.c @@ -1678,14 +1678,14 @@ static struct page *alloc_target_page(struct size_class *class) static void putback_zspage(struct zs_pool *pool, struct size_class *class, struct page *first_page) { - int class_idx; enum fullness_group fullness; BUG_ON(!is_first_page(first_page)); - get_zspage_mapping(first_page, &class_idx, &fullness); + fullness = get_fullness_group(first_page); insert_zspage(first_page, class, fullness); - fullness = fix_fullness_group(class, first_page); + set_zspage_mapping(first_page, class->index, fullness); + if (fullness == ZS_EMPTY) { zs_stat_dec(class, OBJ_ALLOCATED, get_maxobj_per_zspage( class->size, class->pages_per_zspage)); |