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scsi: iscsi: Register sysfs for workqueue iscsi_destroy

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Register sysfs for workqueue iscsi_destroy so that users can set CPU
affinity through "cpumask" for this workqueue to get better isolation in
cloud multi-tenant scenario.

This patch unfolded create_singlethread_workqueue(), added WQ_SYSFS and
drop __WQ_ORDERED_EXPLICIT since __WQ_ORDERED_EXPLICIT workqueue isn't
allowed to change "cpumask".

Link: https://lore.kernel.org/r/20200703051603.1473-1-bob.liu@oracle.com
Suggested-by: Mike Christie <michael.christie@oracle.com>
Reviewed-by: Lee Duncan <lduncan@suse.com>
Reviewed-by: Mike Christie <michael.christie@oracle.com>
Signed-off-by: Bob Liu <bob.liu@oracle.com>
Signed-off-by: Martin K. Petersen <martin.petersen@oracle.com>
This commit is contained in:
Bob Liu 2020-07-03 13:16:03 +08:00 committed by Martin K. Petersen
parent 639341bf88
commit 919a295abf
1 changed files with 3 additions and 1 deletions
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4
drivers/scsi/scsi_transport_iscsi.c
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@ -4765,7 +4765,9 @@ static __init int iscsi_transport_init(void)
goto release_nls;
}
iscsi_destroy_workq = create_singlethread_workqueue("iscsi_destroy");
iscsi_destroy_workq = alloc_workqueue("%s",
WQ_SYSFS | __WQ_LEGACY | WQ_MEM_RECLAIM | WQ_UNBOUND,
1, "iscsi_destroy");
if (!iscsi_destroy_workq) {
err = -ENOMEM;
goto destroy_wq;