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| author | Alasdair G Kergon <agk@redhat.com> | 2009-01-06 03:05:13 +0000 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2009-01-06 03:05:13 +0000 |
| commit | fe9cf30eb8186ef267d1868dc9f12f2d0f40835a (patch) | |
| tree | 357db984073d7362b6c31dd431f77768c65800bf | |
| parent | 784aae735d9b0bba3f8b9faef4c8b30df3bf0128 (diff) | |
| download | op-kernel-dev-fe9cf30eb8186ef267d1868dc9f12f2d0f40835a.zip op-kernel-dev-fe9cf30eb8186ef267d1868dc9f12f2d0f40835a.tar.gz | |
dm mpath: move trigger_event to system workqueue
The same workqueue is used both for sending uevents and processing queued I/O.
Deadlock has been reported in RHEL5 when sending a uevent was blocked waiting
for the queued I/O to be processed. Use scheduled_work() for the asynchronous
uevents instead.
Signed-off-by: Alasdair G Kergon <agk@redhat.com>
| -rw-r--r-- | drivers/md/dm-mpath.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 345a260..095f77b 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -889,7 +889,7 @@ static int fail_path(struct pgpath *pgpath) dm_path_uevent(DM_UEVENT_PATH_FAILED, m->ti, pgpath->path.dev->name, m->nr_valid_paths); - queue_work(kmultipathd, &m->trigger_event); + schedule_work(&m->trigger_event); queue_work(kmultipathd, &pgpath->deactivate_path); out: @@ -932,7 +932,7 @@ static int reinstate_path(struct pgpath *pgpath) dm_path_uevent(DM_UEVENT_PATH_REINSTATED, m->ti, pgpath->path.dev->name, m->nr_valid_paths); - queue_work(kmultipathd, &m->trigger_event); + schedule_work(&m->trigger_event); out: spin_unlock_irqrestore(&m->lock, flags); @@ -976,7 +976,7 @@ static void bypass_pg(struct multipath *m, struct priority_group *pg, spin_unlock_irqrestore(&m->lock, flags); - queue_work(kmultipathd, &m->trigger_event); + schedule_work(&m->trigger_event); } /* @@ -1006,7 +1006,7 @@ static int switch_pg_num(struct multipath *m, const char *pgstr) } spin_unlock_irqrestore(&m->lock, flags); - queue_work(kmultipathd, &m->trigger_event); + schedule_work(&m->trigger_event); return 0; } |
