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authorJan Kara <jack@suse.cz>2017-05-02 13:16:18 +0200
committerJan Kara <jack@suse.cz>2017-05-24 13:35:20 +0200
commitd8747d642ec4ce96adf17ae35652a5e4015cfe02 (patch)
tree646b9b91ec05b4b6e411bf2b428ea9fe2c371d03 /fs
parent0f0b9b63e14fc3f66e4d342df016c9b071c5abed (diff)
downloadlinux-d8747d642ec4ce96adf17ae35652a5e4015cfe02.tar.bz2
reiserfs: Make flush bios explicitely sync
Commit b685d3d65ac7 "block: treat REQ_FUA and REQ_PREFLUSH as synchronous" removed REQ_SYNC flag from WRITE_{FUA|PREFLUSH|...} definitions. generic_make_request_checks() however strips REQ_FUA and REQ_PREFLUSH flags from a bio when the storage doesn't report volatile write cache and thus write effectively becomes asynchronous which can lead to performance regressions Fix the problem by making sure all bios which are synchronous are properly marked with REQ_SYNC. Fixes: b685d3d65ac791406e0dfd8779cc9b3707fea5a3 CC: reiserfs-devel@vger.kernel.org CC: stable@vger.kernel.org Signed-off-by: Jan Kara <jack@suse.cz>
Diffstat (limited to 'fs')
-rw-r--r--fs/reiserfs/journal.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/fs/reiserfs/journal.c b/fs/reiserfs/journal.c
index da01f497180a..39bb1e838d8d 100644
--- a/fs/reiserfs/journal.c
+++ b/fs/reiserfs/journal.c
@@ -1112,7 +1112,7 @@ static int flush_commit_list(struct super_block *s,
depth = reiserfs_write_unlock_nested(s);
if (reiserfs_barrier_flush(s))
__sync_dirty_buffer(jl->j_commit_bh,
- REQ_PREFLUSH | REQ_FUA);
+ REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
else
sync_dirty_buffer(jl->j_commit_bh);
reiserfs_write_lock_nested(s, depth);
@@ -1271,7 +1271,7 @@ static int _update_journal_header_block(struct super_block *sb,
if (reiserfs_barrier_flush(sb))
__sync_dirty_buffer(journal->j_header_bh,
- REQ_PREFLUSH | REQ_FUA);
+ REQ_SYNC | REQ_PREFLUSH | REQ_FUA);
else
sync_dirty_buffer(journal->j_header_bh);