f2fs: skip searching dirty map if dirty segment is not exist (3342bb30) · Commits · 戴 / test

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>

fs/f2fs/gc.c

+4 −0

Original line number	Diff line number	Diff line
		@@ -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;

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