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f2fs: schedule in between two continous batch discards 

In batch discard approach of fstrim will grab/release gc_mutex lock
repeatly, it makes contention of the lock becoming more intensive.

So after one batch discards were issued in checkpoint and the lock
was released, it's better to do schedule() to increase opportunity
of grabbing gc_mutex lock for other competitors.

Signed-off-by: Chao Yu <yuchao0@huawei.com>
Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
This commit is contained in:
Chao Yu 2016-08-21 23:21:30 +08:00 committed by Jaegeuk Kim
parent 97c1794a5d
commit 74fa5f3d43
1 changed files with 2 additions and 0 deletions
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2
fs/f2fs/segment.c
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@ -1305,6 +1305,8 @@ int f2fs_trim_fs(struct f2fs_sb_info *sbi, struct fstrim_range *range)
mutex_unlock(&sbi->gc_mutex);
if (err)
break;
schedule();
}
out:
range->len = F2FS_BLK_TO_BYTES(cpc.trimmed);