From fe9cf30eb8186ef267d1868dc9f12f2d0f40835a Mon Sep 17 00:00:00 2001 From: Alasdair G Kergon Date: Tue, 6 Jan 2009 03:05:13 +0000 Subject: [PATCH] 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 --- drivers/md/dm-mpath.c | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 345a26047ae0..095f77bf9681 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; }