From 41b3cf08cd5e7915293f3784ab649d48bb142153 Mon Sep 17 00:00:00 2001 From: "Stephen M. Cameron" Date: Thu, 29 May 2014 10:53:13 -0500 Subject: hpsa: set irq affinity hints to route MSI-X vectors across CPUs Signed-off-by: Stephen M. Cameron Reviewed-by: Mike Miller Reviewed-by: Scott Teel Signed-off-by: Christoph Hellwig --- drivers/scsi/hpsa.c | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'drivers/scsi') diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c index b474dbaaa8d0..2b7454f6c50f 100644 --- a/drivers/scsi/hpsa.c +++ b/drivers/scsi/hpsa.c @@ -6615,6 +6615,17 @@ static void hpsa_free_cmd_pool(struct ctlr_info *h) h->ioaccel_cmd_pool, h->ioaccel_cmd_pool_dhandle); } +static void hpsa_irq_affinity_hints(struct ctlr_info *h) +{ + int i, cpu, rc; + + cpu = cpumask_first(cpu_online_mask); + for (i = 0; i < h->msix_vector; i++) { + rc = irq_set_affinity_hint(h->intr[i], get_cpu_mask(cpu)); + cpu = cpumask_next(cpu, cpu_online_mask); + } +} + static int hpsa_request_irq(struct ctlr_info *h, irqreturn_t (*msixhandler)(int, void *), irqreturn_t (*intxhandler)(int, void *)) @@ -6634,6 +6645,7 @@ static int hpsa_request_irq(struct ctlr_info *h, rc = request_irq(h->intr[i], msixhandler, 0, h->devname, &h->q[i]); + hpsa_irq_affinity_hints(h); } else { /* Use single reply pool */ if (h->msix_vector > 0 || h->msi_vector) { @@ -6685,12 +6697,15 @@ static void free_irqs(struct ctlr_info *h) if (!h->msix_vector || h->intr_mode != PERF_MODE_INT) { /* Single reply queue, only one irq to free */ i = h->intr_mode; + irq_set_affinity_hint(h->intr[i], NULL); free_irq(h->intr[i], &h->q[i]); return; } - for (i = 0; i < h->msix_vector; i++) + for (i = 0; i < h->msix_vector; i++) { + irq_set_affinity_hint(h->intr[i], NULL); free_irq(h->intr[i], &h->q[i]); + } } static void hpsa_free_irqs_and_disable_msix(struct ctlr_info *h) -- cgit v1.2.3