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authorJaegeuk Kim <jaegeuk@kernel.org>2016-02-18 16:34:38 -0800
committerJaegeuk Kim <jaegeuk@kernel.org>2016-02-22 21:39:59 -0800
commit4ce537763eeb6b9d453f84b70c69c609973ccc1e (patch)
tree523de2afa9148b2016ba58f802f93c2595bd4827 /fs/f2fs
parent8060656aa337f7cd34f1818b24417e8a7a00f4a5 (diff)
f2fs: remain last victim segment number ascending order
This patch avoids to remain inefficient victim segment number selected by a victim. For example, if all the dirty segments has same valid blocks, we can get the victim segments descending order due to keeping wrong last segment number. Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/gc.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c
index 47ade3542fbd..c01353429ba0 100644
--- a/fs/f2fs/gc.c
+++ b/fs/f2fs/gc.c
@@ -270,7 +270,7 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
{
struct dirty_seglist_info *dirty_i = DIRTY_I(sbi);
struct victim_sel_policy p;
- unsigned int secno, max_cost;
+ unsigned int secno, max_cost, last_victim;
unsigned int last_segment = MAIN_SEGS(sbi);
unsigned int nsearched = 0;
@@ -285,6 +285,7 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
if (p.max_search == 0)
goto out;
+ last_victim = sbi->last_victim[p.gc_mode];
if (p.alloc_mode == LFS && gc_type == FG_GC) {
p.min_segno = check_bg_victims(sbi);
if (p.min_segno != NULL_SEGNO)
@@ -332,7 +333,10 @@ static int get_victim_by_default(struct f2fs_sb_info *sbi,
}
next:
if (nsearched >= p.max_search) {
- sbi->last_victim[p.gc_mode] = segno;
+ if (!sbi->last_victim[p.gc_mode] && segno <= last_victim)
+ sbi->last_victim[p.gc_mode] = last_victim + 1;
+ else
+ sbi->last_victim[p.gc_mode] = segno + 1;
break;
}
}