[PATCH 2/2] scsi: register sysfs for scsi workqueue

[Bob Liu]

So that scsi_wq_xxx and scsi_tmf_xxx can be bind to different cpu to get better
isolation.

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

Signed-off-by: Bob Liu <bob...@oracle.com>
---
drivers/scsi/hosts.c | 8 +++++---
1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/drivers/scsi/hosts.c b/drivers/scsi/hosts.c
index 7ec91c3..37d1c55 100644
--- a/drivers/scsi/hosts.c
+++ b/drivers/scsi/hosts.c
@@ -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,
--
2.9.5

[Mike Christie]

Reviewed-by: Mike Christie <michael....@oracle.com>