From 3342bb303bf48dd8bb5ac94c3356489ff53e4d04 Mon Sep 17 00:00:00 2001 From: Chao Yu Date: Mon, 5 Oct 2015 22:20:40 +0800 Subject: [PATCH] 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 Signed-off-by: Jaegeuk Kim --- fs/f2fs/gc.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index e5c255ba227b..d844a8028527 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -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 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi, 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;