diff options
| author | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-11-14 17:38:35 -0800 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk@kernel.org> | 2016-11-25 10:15:57 -0800 |
| commit | 7702bdbe505a22380dd958e2ee35124c7c414806 (patch) | |
| tree | 8dc084fff9df8d1330389b877514977b7eb97ecf /fs/f2fs/gc.c | |
| parent | c040ff9d69fd1d782fe577ba9e35c1f5798158ae (diff) | |
| download | linux-7702bdbe505a22380dd958e2ee35124c7c414806.tar.gz linux-7702bdbe505a22380dd958e2ee35124c7c414806.tar.bz2 linux-7702bdbe505a22380dd958e2ee35124c7c414806.zip | |
f2fs: avoid BG_GC in f2fs_balance_fs
If many threads hit has_not_enough_free_secs() in f2fs_balance_fs() at the same
time, all the threads would do FG_GC or BG_GC.
In this critical path, we totally don't need to do BG_GC at all.
Let's avoid that.
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs/gc.c')
| -rw-r--r-- | fs/f2fs/gc.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index a7b2c13404f8..36f6cfc613d3 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -82,7 +82,7 @@ static int gc_thread_func(void *data) stat_inc_bggc_count(sbi); /* if return value is not zero, no victim was selected */ - if (f2fs_gc(sbi, test_opt(sbi, FORCE_FG_GC))) + if (f2fs_gc(sbi, test_opt(sbi, FORCE_FG_GC), true)) wait_ms = gc_th->no_gc_sleep_time; trace_f2fs_background_gc(sbi->sb, wait_ms, @@ -909,7 +909,7 @@ next: return sec_freed; } -int f2fs_gc(struct f2fs_sb_info *sbi, bool sync) +int f2fs_gc(struct f2fs_sb_info *sbi, bool sync, bool background) { unsigned int segno; int gc_type = sync ? FG_GC : BG_GC; @@ -950,6 +950,9 @@ gc_more: if (ret) goto stop; } + } else if (gc_type == BG_GC && !background) { + /* f2fs_balance_fs doesn't need to do BG_GC in critical path. */ + goto stop; } if (segno == NULL_SEGNO && !__get_victim(sbi, &segno, gc_type)) |