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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>
This commit is contained in:
Minchan Kim 2015-04-15 16:16:18 -07:00 committed by Linus Torvalds
parent 495819ead5
commit 839373e645
1 changed files with 3 additions and 3 deletions
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6
mm/zsmalloc.c
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@ -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));