diff options
| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-11-12 15:00:38 +0900 |
|---|---|---|
| committer | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-12-23 10:18:00 +0900 |
| commit | 7ac8c3b051ed3a3e71df72a7ffc44e14cc5c2bae (patch) | |
| tree | 8a4f45d41c50b2f21b5bd2991ea879016c6d0fbc | |
| parent | b29555505d81e496fdbd125190c8043f3c09a83c (diff) | |
f2fs: add a sysfs entry to control max_discards
If frequent small discards are issued to the device, the performance would
be degraded significantly.
So, this patch adds a sysfs entry to control the number of discards to be
issued during a checkpoint procedure.
By default, f2fs does not issue any small discards, which means max_discards
is zero.
Signed-off-by: Jaegeuk Kim <jaegeuk.kim@samsung.com>
| -rw-r--r-- | fs/f2fs/super.c | 2 |
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/f2fs/super.c b/fs/f2fs/super.c index e9aa3f79f425..a022412c66ea 100644 --- a/fs/f2fs/super.c +++ b/fs/f2fs/super.c @@ -175,6 +175,7 @@ F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_max_sleep_time, max_sleep_time); F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_no_gc_sleep_time, no_gc_sleep_time); F2FS_RW_ATTR(GC_THREAD, f2fs_gc_kthread, gc_idle, gc_idle); F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, reclaim_segments, rec_prefree_segments); +F2FS_RW_ATTR(SM_INFO, f2fs_sm_info, max_small_discards, max_discards); #define ATTR_LIST(name) (&f2fs_attr_##name.attr) static struct attribute *f2fs_attrs[] = { @@ -183,6 +184,7 @@ static struct attribute *f2fs_attrs[] = { ATTR_LIST(gc_no_gc_sleep_time), ATTR_LIST(gc_idle), ATTR_LIST(reclaim_segments), + ATTR_LIST(max_small_discards), NULL, }; |