diff options
| author | Anirban Chakraborty <anirban.chakraborty@qlogic.com> | 2009-04-06 22:33:41 -0700 |
|---|---|---|
| committer | James Bottomley <James.Bottomley@HansenPartnership.com> | 2009-05-20 17:21:08 -0500 |
| commit | 68ca949cdb04b4dc71451a999148fbc5f187a220 (patch) | |
| tree | d1d06940e8f128804529386ccea9c0757e61db0f /drivers/scsi/qla2xxx/qla_isr.c | |
| parent | 2afa19a9377ca61b9489e44bf50029574fbe63be (diff) | |
[SCSI] qla2xxx: Add CPU affinity support.
Set the module parameter ql2xmultique_tag to 1 to enable this
feature. In this mode, the total number of response queues
created is equal to the number of online cpus. Turning the block
layer's rq_affinity mode on enables requests to be routed to the
proper cpu and at the same time it enables completion of the IO
in a response queue that is affined to the cpu in the request
path.
Signed-off-by: Anirban Chakraborty <anirban.chakraborty@qlogic.com>
Signed-off-by: Andrew Vasquez <andrew.vasquez@qlogic.com>
Signed-off-by: James Bottomley <James.Bottomley@HansenPartnership.com>
Diffstat (limited to 'drivers/scsi/qla2xxx/qla_isr.c')
| -rw-r--r-- | drivers/scsi/qla2xxx/qla_isr.c | 22 |
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/scsi/qla2xxx/qla_isr.c b/drivers/scsi/qla2xxx/qla_isr.c index c8e906c702a1..41e50c2bec0f 100644 --- a/drivers/scsi/qla2xxx/qla_isr.c +++ b/drivers/scsi/qla2xxx/qla_isr.c @@ -1718,6 +1718,25 @@ qla24xx_msix_rsp_q(int irq, void *dev_id) } static irqreturn_t +qla25xx_msix_rsp_q(int irq, void *dev_id) +{ + struct qla_hw_data *ha; + struct rsp_que *rsp; + + rsp = (struct rsp_que *) dev_id; + if (!rsp) { + printk(KERN_INFO + "%s(): NULL response queue pointer\n", __func__); + return IRQ_NONE; + } + ha = rsp->hw; + + queue_work_on((int) (rsp->id - 1), ha->wq, &rsp->q_work); + + return IRQ_HANDLED; +} + +static irqreturn_t qla24xx_msix_default(int irq, void *dev_id) { scsi_qla_host_t *vha; @@ -1806,9 +1825,10 @@ struct qla_init_msix_entry { irq_handler_t handler; }; -static struct qla_init_msix_entry msix_entries[2] = { +static struct qla_init_msix_entry msix_entries[3] = { { "qla2xxx (default)", qla24xx_msix_default }, { "qla2xxx (rsp_q)", qla24xx_msix_rsp_q }, + { "qla2xxx (multiq)", qla25xx_msix_rsp_q }, }; static void |