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scsi: iscsi: Register sysfs for iscsi workqueue

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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>
This commit is contained in:
Bob Liu 2020-05-05 09:19:08 +08:00 committed by Martin K. Petersen
parent b6ff8ca733
commit 3ce419662d
2 changed files with 6 additions and 2 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

4
drivers/scsi/libiscsi.c
View file

@ -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;
}

4
drivers/scsi/scsi_transport_iscsi.c
View file

@ -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;