Commit 62921300 authored Jul 01, 2020 by Bob Liu Committed by Martin K. Petersen Jul 02, 2020

scsi: core: Register sysfs for SCSI workqueue

Permit scsi_wq_xxx and scsi_tmf_xxx to be bound to different CPUs to get
better isolation.

Use alloc_workqueue with WQ_SYSFS and drop __WQ_ORDERED_EXPLICIT since a
__WQ_ORDERED_EXPLICIT workqueue isn't allowed to change the CPU mask.

Link: https://lore.kernel.org/r/20200701030745.16897-2-bob.liu@oracle.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>

parent 3fed58b9

drivers/scsi/hosts.c

+5 −3

Original line number	Diff line number	Diff line
		@@ -272,8 +272,10 @@ int scsi_add_host_with_dma(struct Scsi_Host shost, struct device dev,
		if (shost->transportt->create_work_queue) {
		snprintf(shost->work_q_name, sizeof(shost->work_q_name),
		"scsi_wq_%d", shost->host_no);
		shost->work_q = create_singlethread_workqueue(
		shost->work_q_name);
		shost->work_q = alloc_workqueue("%s",
		WQ_SYSFS \| __WQ_LEGACY \| WQ_MEM_RECLAIM \| WQ_UNBOUND,
		1, shost->work_q_name);

		if (!shost->work_q) {
		error = -EINVAL;
		goto out_free_shost_data;
		@@ -487,7 +489,7 @@ struct Scsi_Host scsi_host_alloc(struct scsi_host_template sht, int privsize)
		}

		shost->tmf_work_q = alloc_workqueue("scsi_tmf_%d",
		WQ_UNBOUND \| WQ_MEM_RECLAIM,
		WQ_UNBOUND \| WQ_MEM_RECLAIM \| WQ_SYSFS,
		1, shost->host_no);
		if (!shost->tmf_work_q) {
		shost_printk(KERN_WARNING, shost,