Groups | Search | Server Info | Keyboard shortcuts | Login | Register [http] [https] [nntp] [nntps]

Groups > linux.kernel > #1239598 > unrolled thread

[PATCH 2/4] f2fs: skip searching dirty map if dirty segment is not exist

Back to article view | Back to linux.kernel

Contents

  [PATCH 2/4] f2fs: skip searching dirty map if dirty segment is not exist Chao Yu <yuchaochina@hotmail.com> - 2015-10-05 16:30 +0200

#1239598 — [PATCH 2/4] 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>
---
 fs/f2fs/gc.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index e5c255b..d844a80 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 @@ 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;
-- 
2.5.3

--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/

[toc] | [standalone]

Back to top | Article view | linux.kernel

csiph-web