diff options
| author | Tejun Heo <tj@kernel.org> | 2009-09-11 14:26:40 +0200 |
|---|---|---|
| committer | Jens Axboe <jens.axboe@oracle.com> | 2009-09-11 14:33:30 +0200 |
| commit | da6c5c720c52cc717124f8f0830b710ea6a092fd (patch) | |
| tree | f54c880aec9289895721e707d4b22e456b277127 /block/elevator.c | |
| parent | 80a761fd33cf812f771e212139157bf8f58d4b3f (diff) | |
scsi,block: update SCSI to handle mixed merge failures
Update scsi_io_completion() such that it only fails requests till the
next error boundary and retry the leftover. This enables block layer
to merge requests with different failfast settings and still behave
correctly on errors. Allow merge of requests of different failfast
settings.
As SCSI is currently the only subsystem which follows failfast status,
there's no need to worry about other block drivers for now.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Niel Lambrechts <niel.lambrechts@gmail.com>
Cc: James Bottomley <James.Bottomley@HansenPartnership.com>
Signed-off-by: Jens Axboe <jens.axboe@oracle.com>
Diffstat (limited to 'block/elevator.c')
| -rw-r--r-- | block/elevator.c | 13 |
1 files changed, 0 insertions, 13 deletions
diff --git a/block/elevator.c b/block/elevator.c index 2d511f9105e..ca861927ba4 100644 --- a/block/elevator.c +++ b/block/elevator.c @@ -100,19 +100,6 @@ int elv_rq_merge_ok(struct request *rq, struct bio *bio) if (bio_integrity(bio) != blk_integrity_rq(rq)) return 0; - /* - * Don't merge if failfast settings don't match. - * - * FIXME: The negation in front of each condition is necessary - * because bio and request flags use different bit positions - * and the accessors return those bits directly. This - * ugliness will soon go away. - */ - if (!bio_failfast_dev(bio) != !blk_failfast_dev(rq) || - !bio_failfast_transport(bio) != !blk_failfast_transport(rq) || - !bio_failfast_driver(bio) != !blk_failfast_driver(rq)) - return 0; - if (!elv_iosched_allow_merge(rq, bio)) return 0; |