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| author | Mikulas Patocka <mpatocka@redhat.com> | 2009-06-22 10:12:18 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-06-22 10:12:18 +0100 |
| commit | 2761e95fe40ca0d01864310fa4d488d7c5e34e18 (patch) | |
| tree | a49245e8ebb022605c5d1ce04948cf4a7f9a5c3b /drivers/md/dm.c | |
| parent | 531fe96364f30879753d46c1f52ab839e12d2e5d (diff) | |
| download | op-kernel-dev-2761e95fe40ca0d01864310fa4d488d7c5e34e18.zip op-kernel-dev-2761e95fe40ca0d01864310fa4d488d7c5e34e18.tar.gz | |
dm: process requeue in dm_wq_work
If barrier request was returned with DM_ENDIO_REQUEUE,
requeue it in dm_wq_work instead of dec_pending.
This allows us to correctly handle a situation when some targets
are asking for a requeue and other targets signal an error.
Signed-off-by: Mikulas Patocka <mpatocka@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm.c')
| -rw-r--r-- | drivers/md/dm.c | 13 |
1 files changed, 10 insertions, 3 deletions
diff --git a/drivers/md/dm.c b/drivers/md/dm.c index e34d694..910bce8 100644 --- a/drivers/md/dm.c +++ b/drivers/md/dm.c @@ -536,9 +536,11 @@ static void dec_pending(struct dm_io *io, int error) * Target requested pushing back the I/O. */ spin_lock_irqsave(&md->deferred_lock, flags); - if (__noflush_suspending(md)) - bio_list_add_head(&md->deferred, io->bio); - else + if (__noflush_suspending(md)) { + if (!bio_barrier(io->bio)) + bio_list_add_head(&md->deferred, + io->bio); + } else /* noflush suspend was interrupted. */ io->error = -EIO; spin_unlock_irqrestore(&md->deferred_lock, flags); @@ -1458,6 +1460,11 @@ static void process_barrier(struct mapped_device *md, struct bio *bio) if (md->barrier_error != DM_ENDIO_REQUEUE) bio_endio(bio, md->barrier_error); + else { + spin_lock_irq(&md->deferred_lock); + bio_list_add_head(&md->deferred, bio); + spin_unlock_irq(&md->deferred_lock); + } } /* |
