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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-10-24 13:31:34 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-10-25 16:54:37 +0900 |
| commit | 81eb8d6e2869b119d4a7b8c02091c3779733a3ac (patch) | |
| tree | cdff776596fa79bfc9c2f2baf7aa59470dc29aec /fs/f2fs/gc.c | |
| parent | aabe51364f44681cbd83fb1c27ef7d3dbe567c45 (diff) | |
| download | linux-81eb8d6e2869b119d4a7b8c02091c3779733a3ac.tar.bz2 | |
f2fs: reclaim prefree segments periodically
Previously, f2fs postpones reclaiming prefree segments into free segments
as much as possible.
However, if user writes and deletes a bunch of data without any sync or fsync
calls, some flash storages can suffer from garbage collections.
So, this patch adds the reclaiming codes to f2fs_write_node_pages and background
GC thread.
If there are a lot of prefree segments, let's do checkpoint so that f2fs
submits discard commands for the prefree regions to the flash storage.
Signed-off-by: Changman Lee <cm224.lee@samsung.com>
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
Diffstat (limited to 'fs/f2fs/gc.c')
| -rw-r--r-- | fs/f2fs/gc.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/fs/f2fs/gc.c b/fs/f2fs/gc.c index cb286d7b02b2..783c6cc6253c 100644 --- a/fs/f2fs/gc.c +++ b/fs/f2fs/gc.c @@ -82,6 +82,11 @@ static int gc_thread_func(void *data) /* if return value is not zero, no victim was selected */ if (f2fs_gc(sbi)) wait_ms = gc_th->no_gc_sleep_time; + + /* balancing prefree segments */ + if (excess_prefree_segs(sbi)) + f2fs_sync_fs(sbi->sb, true); + } while (!kthread_should_stop()); return 0; } |