diff options
Diffstat (limited to 'drivers/md/dm-mpath.c')
| -rw-r--r-- | drivers/md/dm-mpath.c | 35 |
1 files changed, 25 insertions, 10 deletions
diff --git a/drivers/md/dm-mpath.c b/drivers/md/dm-mpath.c index 43763a0bd096..0c1b8520ef86 100644 --- a/drivers/md/dm-mpath.c +++ b/drivers/md/dm-mpath.c @@ -101,6 +101,7 @@ typedef int (*action_fn) (struct pgpath *pgpath); static kmem_cache_t *_mpio_cache; +struct workqueue_struct *kmultipathd; static void process_queued_ios(void *data); static void trigger_event(void *data); @@ -308,7 +309,7 @@ static int map_io(struct multipath *m, struct bio *bio, struct mpath_io *mpio, bio_list_add(&m->queued_ios, bio); m->queue_size++; if (m->pg_init_required || !m->queue_io) - schedule_work(&m->process_queued_ios); + queue_work(kmultipathd, &m->process_queued_ios); pgpath = NULL; r = 0; } else if (!pgpath) @@ -334,7 +335,7 @@ static int queue_if_no_path(struct multipath *m, unsigned queue_if_no_path) m->queue_if_no_path = queue_if_no_path; if (!m->queue_if_no_path) - schedule_work(&m->process_queued_ios); + queue_work(kmultipathd, &m->process_queued_ios); spin_unlock_irqrestore(&m->lock, flags); @@ -800,7 +801,7 @@ static int fail_path(struct pgpath *pgpath) if (pgpath == m->current_pgpath) m->current_pgpath = NULL; - schedule_work(&m->trigger_event); + queue_work(kmultipathd, &m->trigger_event); out: spin_unlock_irqrestore(&m->lock, flags); @@ -837,9 +838,9 @@ static int reinstate_path(struct pgpath *pgpath) m->current_pgpath = NULL; if (!m->nr_valid_paths++) - schedule_work(&m->process_queued_ios); + queue_work(kmultipathd, &m->process_queued_ios); - schedule_work(&m->trigger_event); + queue_work(kmultipathd, &m->trigger_event); out: spin_unlock_irqrestore(&m->lock, flags); @@ -883,7 +884,7 @@ static void bypass_pg(struct multipath *m, struct priority_group *pg, spin_unlock_irqrestore(&m->lock, flags); - schedule_work(&m->trigger_event); + queue_work(kmultipathd, &m->trigger_event); } /* @@ -913,7 +914,7 @@ static int switch_pg_num(struct multipath *m, const char *pgstr) } spin_unlock_irqrestore(&m->lock, flags); - schedule_work(&m->trigger_event); + queue_work(kmultipathd, &m->trigger_event); return 0; } @@ -968,7 +969,7 @@ void dm_pg_init_complete(struct path *path, unsigned err_flags) m->current_pgpath = NULL; m->current_pg = NULL; } - schedule_work(&m->process_queued_ios); + queue_work(kmultipathd, &m->process_queued_ios); spin_unlock_irqrestore(&m->lock, flags); } @@ -984,6 +985,9 @@ static int do_end_io(struct multipath *m, struct bio *bio, if (!error) return 0; /* I/O complete */ + if ((error == -EWOULDBLOCK) && bio_rw_ahead(bio)) + return error; + spin_lock(&m->lock); if (!m->nr_valid_paths) { if (!m->queue_if_no_path || m->suspended) { @@ -1018,7 +1022,7 @@ static int do_end_io(struct multipath *m, struct bio *bio, bio_list_add(&m->queued_ios, bio); m->queue_size++; if (!m->queue_io) - schedule_work(&m->process_queued_ios); + queue_work(kmultipathd, &m->process_queued_ios); spin_unlock(&m->lock); return 1; /* io not complete */ @@ -1057,7 +1061,7 @@ static void multipath_presuspend(struct dm_target *ti) spin_lock_irqsave(&m->lock, flags); m->suspended = 1; if (m->queue_if_no_path) - schedule_work(&m->process_queued_ios); + queue_work(kmultipathd, &m->process_queued_ios); spin_unlock_irqrestore(&m->lock, flags); } @@ -1274,6 +1278,15 @@ static int __init dm_multipath_init(void) return -EINVAL; } + kmultipathd = create_workqueue("kmpathd"); + if (!kmultipathd) { + DMERR("%s: failed to create workqueue kmpathd", + multipath_target.name); + dm_unregister_target(&multipath_target); + kmem_cache_destroy(_mpio_cache); + return -ENOMEM; + } + DMINFO("dm-multipath version %u.%u.%u loaded", multipath_target.version[0], multipath_target.version[1], multipath_target.version[2]); @@ -1285,6 +1298,8 @@ static void __exit dm_multipath_exit(void) { int r; + destroy_workqueue(kmultipathd); + r = dm_unregister_target(&multipath_target); if (r < 0) DMERR("%s: target unregister failed %d", |