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f2fs: skip searching dirty map if dirty segment is not exist 

When searching victim during gc, if there are no dirty segments in
filesystem, we will still take the time to search the whole dirty segment
map, it's not needed, it's better to skip in this condition.

Signed-off-by: Chao Yu <chao2.yu@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2015-10-05 22:20:40 +08:00 committed by Jaegeuk Kim
parent a43f7ec327
commit 3342bb303b
1 changed files with 4 additions and 0 deletions
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4
fs/f2fs/gc.c
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@ -268,6 +268,9 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
p.min_segno = NULL_SEGNO;
p.min_cost = max_cost = get_max_cost(sbi, &p);
if (p.max_search == 0)
goto out;
if (p.alloc_mode == LFS && gc_type == FG_GC) {
p.min_segno = check_bg_victims(sbi);
if (p.min_segno != NULL_SEGNO)
@ -329,6 +332,7 @@ got_it:
sbi->cur_victim_sec,
prefree_segments(sbi), free_segments(sbi));
}
out:
mutex_unlock(&dirty_i->seglist_lock);
return (p.min_segno == NULL_SEGNO) ? 0 : 1;