diff options
| author | Mike Christie <michaelc@cs.wisc.edu> | 2007-12-13 18:43:27 (GMT) |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2008-01-12 00:28:30 (GMT) |
| commit | d8bf541e657824cb03effd726ac96e2f4dcf58a5 (patch) | |
| tree | 9f51f1c8a8a538692fb1efc16db285baf22cbc23 | |
| parent | b3a7ea8d50f6028964b468d13a095dfb2508b2fb (diff) | |
| download | linux-d8bf541e657824cb03effd726ac96e2f4dcf58a5.tar.xz | |
[SCSI] iscsi class: Use our own workq instead of common system one.
There is just too much going on through the common workq and
something like a scsi device removal through sysfs affects
how long it will take to recover the transport, mark it as
failed, or shut it down gracefully.
Signed-off-by: Mike Christie <michaelc@cs.wisc.edu>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
| -rw-r--r-- | drivers/scsi/scsi_transport_iscsi.c | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/drivers/scsi/scsi_transport_iscsi.c b/drivers/scsi/scsi_transport_iscsi.c index 75d3069..9cc2cc8 100644 --- a/drivers/scsi/scsi_transport_iscsi.c +++ b/drivers/scsi/scsi_transport_iscsi.c @@ -50,6 +50,7 @@ struct iscsi_internal { }; static atomic_t iscsi_session_nr; /* sysfs session id for next new session */ +static struct workqueue_struct *iscsi_eh_timer_workq; /* * list of registered transports and lock that must @@ -252,7 +253,7 @@ static void session_recovery_timedout(struct work_struct *work) void iscsi_unblock_session(struct iscsi_cls_session *session) { if (!cancel_delayed_work(&session->recovery_work)) - flush_scheduled_work(); + flush_workqueue(iscsi_eh_timer_workq); scsi_target_unblock(&session->dev); } EXPORT_SYMBOL_GPL(iscsi_unblock_session); @@ -260,8 +261,8 @@ EXPORT_SYMBOL_GPL(iscsi_unblock_session); void iscsi_block_session(struct iscsi_cls_session *session) { scsi_target_block(&session->dev); - schedule_delayed_work(&session->recovery_work, - session->recovery_tmo * HZ); + queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work, + session->recovery_tmo * HZ); } EXPORT_SYMBOL_GPL(iscsi_block_session); @@ -357,7 +358,7 @@ void iscsi_remove_session(struct iscsi_cls_session *session) struct iscsi_host *ihost = shost->shost_data; if (!cancel_delayed_work(&session->recovery_work)) - flush_scheduled_work(); + flush_workqueue(iscsi_eh_timer_workq); mutex_lock(&ihost->mutex); list_del(&session->host_list); @@ -1521,8 +1522,14 @@ static __init int iscsi_transport_init(void) goto unregister_session_class; } + iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh"); + if (!iscsi_eh_timer_workq) + goto release_nls; + return 0; +release_nls: + sock_release(nls->sk_socket); unregister_session_class: transport_class_unregister(&iscsi_session_class); unregister_conn_class: @@ -1536,6 +1543,7 @@ unregister_transport_class: static void __exit iscsi_transport_exit(void) { + destroy_workqueue(iscsi_eh_timer_workq); sock_release(nls->sk_socket); transport_class_unregister(&iscsi_connection_class); transport_class_unregister(&iscsi_session_class); |