diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-02-18 16:34:38 -0800 |
|---|---|---|
| committer | Mister Oyster <oysterized@gmail.com> | 2017-04-13 12:33:06 +0200 |
| commit | 87a9d492ac0b2e39e0a8d3e78478e4a14aebf531 (patch) | |
| tree | f04499711c64467b4fd787e05e25e521d0cdf0fc | |
| parent | dcb9e1dfcec82df340738823fe93f2310c7af7c9 (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>
| -rw-r--r-- | fs/f2fs/gc.c | 8 |
1 files changed, 6 insertions, 2 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index 2df746fed..d2f4583d2 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; } } |