Commit 3ce41966 authored by Bob Liu's avatar Bob Liu Committed by Martin K. Petersen
Browse files

scsi: iscsi: Register sysfs for iscsi workqueue 

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: default avatarLee Duncan <lduncan@suse.com>
Signed-off-by: default avatarBob Liu <bob.liu@oracle.com>
Signed-off-by: default avatarMartin K. Petersen <martin.petersen@oracle.com>
parent b6ff8ca7

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;