scsi: iscsi: Register sysfs for iscsi workqueue (3ce41966) · Commits · 戴 / test

This patch enables setting cpu affinity through "cpumask" for iscsi workqueues (iscsi_q_xx and iscsi_eh), so as to get performance isolation. The max number of active worker was changed form 1 to 2, because "cpumask" of ordered workqueue isn't allowed to change. Link: https://lore.kernel.org/r/20200505011908.15538-1-bob.liu@oracle.com Reviewed-by:

Lee Duncan <lduncan@suse.com> Signed-off-by:

Bob Liu <bob.liu@oracle.com> Signed-off-by:

Martin K. Petersen <martin.petersen@oracle.com>

drivers/scsi/libiscsi.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -2627,7 +2627,9 @@ struct Scsi_Host iscsi_host_alloc(struct scsi_host_template sht,
		if (xmit_can_sleep) {
		snprintf(ihost->workq_name, sizeof(ihost->workq_name),
		"iscsi_q_%d", shost->host_no);
		ihost->workq = create_singlethread_workqueue(ihost->workq_name);
		ihost->workq = alloc_workqueue("%s",
		WQ_SYSFS \| __WQ_LEGACY \| WQ_MEM_RECLAIM \| WQ_UNBOUND,
		2, ihost->workq_name);
		if (!ihost->workq)
		goto free_host;
		}

drivers/scsi/scsi_transport_iscsi.c

+3 −1

Original line number	Diff line number	Diff line
		@@ -4728,7 +4728,9 @@ static __init int iscsi_transport_init(void)
		goto unregister_flashnode_bus;
		}

		iscsi_eh_timer_workq = create_singlethread_workqueue("iscsi_eh");
		iscsi_eh_timer_workq = alloc_workqueue("%s",
		WQ_SYSFS \| __WQ_LEGACY \| WQ_MEM_RECLAIM \| WQ_UNBOUND,
		2, "iscsi_eh");
		if (!iscsi_eh_timer_workq) {
		err = -ENOMEM;
		goto release_nls;

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