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[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>
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parent
b3a7ea8d50
commit
d8bf541e65
1 changed files with 12 additions and 4 deletions
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@ -50,6 +50,7 @@ struct iscsi_internal {
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};
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static atomic_t iscsi_session_nr; /* sysfs session id for next new session */
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static struct workqueue_struct *iscsi_eh_timer_workq;
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/*
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* list of registered transports and lock that must
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@ -252,7 +253,7 @@ static void session_recovery_timedout(struct work_struct *work)
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void iscsi_unblock_session(struct iscsi_cls_session *session)
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{
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if (!cancel_delayed_work(&session->recovery_work))
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flush_scheduled_work();
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flush_workqueue(iscsi_eh_timer_workq);
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scsi_target_unblock(&session->dev);
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}
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EXPORT_SYMBOL_GPL(iscsi_unblock_session);
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@ -260,8 +261,8 @@ EXPORT_SYMBOL_GPL(iscsi_unblock_session);
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void iscsi_block_session(struct iscsi_cls_session *session)
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{
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scsi_target_block(&session->dev);
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schedule_delayed_work(&session->recovery_work,
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session->recovery_tmo * HZ);
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queue_delayed_work(iscsi_eh_timer_workq, &session->recovery_work,
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session->recovery_tmo * HZ);
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}
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EXPORT_SYMBOL_GPL(iscsi_block_session);
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@ -357,7 +358,7 @@ void iscsi_remove_session(struct iscsi_cls_session *session)
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struct iscsi_host *ihost = shost->shost_data;
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if (!cancel_delayed_work(&session->recovery_work))
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flush_scheduled_work();
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flush_workqueue(iscsi_eh_timer_workq);
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mutex_lock(&ihost->mutex);
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list_del(&session->host_list);
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@ -1521,8 +1522,14 @@ static __init int iscsi_transport_init(void)
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goto unregister_session_class;
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}
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iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
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if (!iscsi_eh_timer_workq)
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goto release_nls;
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return 0;
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release_nls:
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sock_release(nls->sk_socket);
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unregister_session_class:
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transport_class_unregister(&iscsi_session_class);
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unregister_conn_class:
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@ -1536,6 +1543,7 @@ static __init int iscsi_transport_init(void)
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static void __exit iscsi_transport_exit(void)
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{
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destroy_workqueue(iscsi_eh_timer_workq);
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sock_release(nls->sk_socket);
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transport_class_unregister(&iscsi_connection_class);
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transport_class_unregister(&iscsi_session_class);
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