summaryrefslogtreecommitdiffstats
path: root/fs/f2fs
diff options
context:
space:
mode:
authorJaegeuk Kim <jaegeuk@kernel.org>2017-02-27 11:57:11 -0800
committerJaegeuk Kim <jaegeuk@kernel.org>2017-02-27 13:44:08 -0800
commit8b107f5b97772c7c0c218302e9a4d15b4edf50b4 (patch)
tree24e6488c95bd4af2ced1654de8f889c148ad1271 /fs/f2fs
parent37e79cd31c2c4dcd7e149958ca3cae9d180c63c7 (diff)
downloadlinux-stable-8b107f5b97772c7c0c218302e9a4d15b4edf50b4.tar.gz
linux-stable-8b107f5b97772c7c0c218302e9a4d15b4edf50b4.tar.bz2
linux-stable-8b107f5b97772c7c0c218302e9a4d15b4edf50b4.zip
f2fs: avoid to issue redundant discard commands
If segs_per_sec is over 1 like under SMR, previously f2fs issues discard commands redundantly on the same section, since we didn't move end position for the previous discard command. E.g., start end | | prefree_bitmap = [01111100111100] And, after issue discard for this section, end start | | prefree_bitmap = [01111100111100] Select this section again by searching from (end + 1), start end | | prefree_bitmap = [01111100111100] Fixes: 36abef4e796d38 ("f2fs: introduce mode=lfs mount option") Cc: <stable@vger.kernel.org> Cc: Damien Le Moal <damien.lemoal@wdc.com> Signed-off-by: Jaegeuk Kim <jaegeuk@kernel.org>
Diffstat (limited to 'fs/f2fs')
-rw-r--r--fs/f2fs/segment.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/fs/f2fs/segment.c b/fs/f2fs/segment.c
index 9006d8ed6f52..4bd7a8b19332 100644
--- a/fs/f2fs/segment.c
+++ b/fs/f2fs/segment.c
@@ -1036,6 +1036,8 @@ next:
start = start_segno + sbi->segs_per_sec;
if (start < end)
goto next;
+ else
+ end = start - 1;
}
mutex_unlock(&dirty_i->seglist_lock);