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authorStephen M. Cameron <scameron@beardog.cce.hp.com>2014-05-29 10:53:13 -0500
committerChristoph Hellwig <hch@lst.de>2014-06-02 09:54:55 +0200
commit41b3cf08cd5e7915293f3784ab649d48bb142153 (patch)
treee9a3d5966ad331f9524501d81006560097991810
parent072b0518b0f75296443a0df9fe7f25e052e62652 (diff)
downloadop-kernel-dev-41b3cf08cd5e7915293f3784ab649d48bb142153.zip
op-kernel-dev-41b3cf08cd5e7915293f3784ab649d48bb142153.tar.gz
hpsa: set irq affinity hints to route MSI-X vectors across CPUs
Signed-off-by: Stephen M. Cameron <scameron@beardog.cce.hp.com> Reviewed-by: Mike Miller <michael.miller@canonical.com> Reviewed-by: Scott Teel <scott.teel@hp.com> Signed-off-by: Christoph Hellwig <hch@lst.de>
-rw-r--r--drivers/scsi/hpsa.c17
1 files changed, 16 insertions, 1 deletions
diff --git a/drivers/scsi/hpsa.c b/drivers/scsi/hpsa.c
index b474dba..2b7454f6 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)
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