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ixgbevf: Use a private workqueue to avoid certain possible hangs
Use a private workqueue to avoid hangs that were otherwise possible when performing stress tests, such as creating and destroying many VFS repeatedly. Signed-off-by: Mark Rustad <mark.d.rustad@intel.com> Tested-by: Darin Miller <darin.j.miller@intel.com> Signed-off-by: Jeff Kirsher <jeffrey.t.kirsher@intel.com>
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@ -59,7 +59,7 @@ static const char ixgbevf_driver_string[] =
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#define DRV_VERSION "2.12.1-k"
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const char ixgbevf_driver_version[] = DRV_VERSION;
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static char ixgbevf_copyright[] =
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"Copyright (c) 2009 - 2012 Intel Corporation.";
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"Copyright (c) 2009 - 2015 Intel Corporation.";
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static const struct ixgbevf_info *ixgbevf_info_tbl[] = {
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[board_82599_vf] = &ixgbevf_82599_vf_info,
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@ -96,12 +96,14 @@ static int debug = -1;
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module_param(debug, int, 0);
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MODULE_PARM_DESC(debug, "Debug level (0=none,...,16=all)");
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static struct workqueue_struct *ixgbevf_wq;
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static void ixgbevf_service_event_schedule(struct ixgbevf_adapter *adapter)
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{
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if (!test_bit(__IXGBEVF_DOWN, &adapter->state) &&
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!test_bit(__IXGBEVF_REMOVING, &adapter->state) &&
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!test_and_set_bit(__IXGBEVF_SERVICE_SCHED, &adapter->state))
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schedule_work(&adapter->service_task);
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queue_work(ixgbevf_wq, &adapter->service_task);
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}
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static void ixgbevf_service_event_complete(struct ixgbevf_adapter *adapter)
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@ -4250,6 +4252,11 @@ static int __init ixgbevf_init_module(void)
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ixgbevf_driver_version);
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pr_info("%s\n", ixgbevf_copyright);
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ixgbevf_wq = create_singlethread_workqueue(ixgbevf_driver_name);
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if (!ixgbevf_wq) {
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pr_err("%s: Failed to create workqueue\n", ixgbevf_driver_name);
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return -ENOMEM;
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}
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ret = pci_register_driver(&ixgbevf_driver);
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return ret;
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@ -4266,6 +4273,10 @@ module_init(ixgbevf_init_module);
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static void __exit ixgbevf_exit_module(void)
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{
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pci_unregister_driver(&ixgbevf_driver);
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if (ixgbevf_wq) {
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destroy_workqueue(ixgbevf_wq);
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ixgbevf_wq = NULL;
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}
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}
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#ifdef DEBUG
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