diff options
| author |   Shaohua Li <shli@fb.com> | 2017-02-21 10:56:19 -0800 |
|---|---|---|
| committer | Shaohua Li <shli@fb.com> | 2017-02-23 11:59:43 -0800 |
| commit | aff8da09f2381f0869faaf6637b0d892a3ee99ed (patch) | |
| tree | 5cebc473d84c008f75c5f7980c432f02a7a9fb94 /drivers/md | |
| parent | md/linear: shutup lockdep warnning (diff) | |
| download | linux-dev-aff8da09f2381f0869faaf6637b0d892a3ee99ed.tar.xz linux-dev-aff8da09f2381f0869faaf6637b0d892a3ee99ed.zip | |
md/raid1: handle flush request correctly
I got a warning triggered in align_to_barrier_unit_end. It's a flush
request so sectors == 0. The flush request happens to work well without
the new barrier patch, but we'd better handle it explictly.
Cc: NeilBrown <neilb@suse.com>
Acked-by: Coly Li <colyli@suse.de>
Signed-off-by: Shaohua Li <shli@fb.com>
Diffstat (limited to 'drivers/md')
| -rw-r--r-- | drivers/md/raid1.c | 10 |
1 files changed, 7 insertions, 3 deletions
diff --git a/drivers/md/raid1.c b/drivers/md/raid1.c index 2e5e4805cbe1..8901f0c8c775 100644 --- a/drivers/md/raid1.c +++ b/drivers/md/raid1.c @@ -1282,8 +1282,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio) unsigned long flags; const int op = bio_op(bio); const unsigned long do_sync = (bio->bi_opf & REQ_SYNC); - const unsigned long do_flush_fua = (bio->bi_opf & - (REQ_PREFLUSH | REQ_FUA)); + const unsigned long do_fua = (bio->bi_opf & REQ_FUA); struct md_rdev *blocked_rdev; struct blk_plug_cb *cb; struct raid1_plug_cb *plug = NULL; @@ -1509,7 +1508,7 @@ static void raid1_write_request(struct mddev *mddev, struct bio *bio) conf->mirrors[i].rdev->data_offset); mbio->bi_bdev = conf->mirrors[i].rdev->bdev; mbio->bi_end_io = raid1_end_write_request; - bio_set_op_attrs(mbio, op, do_flush_fua | do_sync); + bio_set_op_attrs(mbio, op, do_fua | do_sync); if (test_bit(FailFast, &conf->mirrors[i].rdev->flags) && !test_bit(WriteMostly, &conf->mirrors[i].rdev->flags) && conf->raid_disks - mddev->degraded > 1) @@ -1565,6 +1564,11 @@ static void raid1_make_request(struct mddev *mddev, struct bio *bio) struct bio *split; sector_t sectors; + if (unlikely(bio->bi_opf & REQ_PREFLUSH)) { + md_flush_request(mddev, bio); + return; + } + /* if bio exceeds barrier unit boundary, split it */ do { sectors = align_to_barrier_unit_end( |