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| author | Jaegeuk Kim <jaegeuk.kim@samsung.com> | 2013-11-12 15:00:38 +0900 |
|---|---|---|
| committer | Andreas Blaesius <skate4life@gmx.de> | 2016-06-05 21:20:51 +0200 |
| commit | b2311c90c042e8a12f4347b402068b9ce63ef163 (patch) | |
| tree | 595ed55d2b3b48dbe4ddce87df77de73df2ad7ac | |
| parent | e3399633c7d42c7fed67b0cb7f56125ea51ac315 (diff) | |
| download | kernel_samsung_espresso10-b2311c90c042e8a12f4347b402068b9ce63ef163.zip kernel_samsung_espresso10-b2311c90c042e8a12f4347b402068b9ce63ef163.tar.gz kernel_samsung_espresso10-b2311c90c042e8a12f4347b402068b9ce63ef163.tar.bz2 | |
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 ae177e0..420f8de 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, }; |