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dm mpath: disable blk_abort_queue

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Revert commit 224cb3e981
  dm: Call blk_abort_queue on failed paths

Multipath began to use blk_abort_queue() to allow for
lower latency path deactivation.  This was found to
cause list corruption:

   the cmd gets blk_abort_queued/timedout run on it and the scsi eh
   somehow is able to complete and run scsi_queue_insert while
   scsi_request_fn is still trying to process the request.

   https://www.redhat.com/archives/dm-devel/2010-November/msg00085.html

Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Cc: Mike Anderson <andmike@linux.vnet.ibm.com>
Cc: Mike Christie <michaelc@cs.wisc.edu>
Cc: stable@kernel.org
This commit is contained in:
Mike Snitzer 2011-01-13 19:59:46 +00:00 committed by Alasdair G Kergon
parent c217649bf2
commit 09c9d4c9b6
1 changed files with 0 additions and 12 deletions
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12
drivers/md/dm-mpath.c
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@ -33,7 +33,6 @@ struct pgpath {
unsigned fail_count; /* Cumulative failure count */
struct dm_path path;
struct work_struct deactivate_path;
struct work_struct activate_path;
};
@ -116,7 +115,6 @@ static struct workqueue_struct *kmultipathd, *kmpath_handlerd;
static void process_queued_ios(struct work_struct *work);
static void trigger_event(struct work_struct *work);
static void activate_path(struct work_struct *work);
static void deactivate_path(struct work_struct *work);
/*-----------------------------------------------
@ -129,7 +127,6 @@ static struct pgpath *alloc_pgpath(void)
if (pgpath) {
pgpath->is_active = 1;
INIT_WORK(&pgpath->deactivate_path, deactivate_path);
INIT_WORK(&pgpath->activate_path, activate_path);
}
@ -141,14 +138,6 @@ static void free_pgpath(struct pgpath *pgpath)
kfree(pgpath);
}
static void deactivate_path(struct work_struct *work)
{
struct pgpath *pgpath =
container_of(work, struct pgpath, deactivate_path);
blk_abort_queue(pgpath->path.dev->bdev->bd_disk->queue);
}
static struct priority_group *alloc_priority_group(void)
{
struct priority_group *pg;
@ -995,7 +984,6 @@ static int fail_path(struct pgpath *pgpath)
pgpath->path.dev->name, m->nr_valid_paths);
schedule_work(&m->trigger_event);
queue_work(kmultipathd, &pgpath->deactivate_path);
out:
spin_unlock_irqrestore(&m->lock, flags);