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| author | Stephen M. Cameron <scameron@beardog.cce.hp.com> | 2014-05-29 10:53:13 -0500 |
|---|---|---|
| committer | Christoph Hellwig <hch@lst.de> | 2014-06-02 09:54:55 +0200 |
| commit | 41b3cf08cd5e7915293f3784ab649d48bb142153 (patch) | |
| tree | e9a3d5966ad331f9524501d81006560097991810 /drivers/scsi/hpsa.c | |
| parent | 072b0518b0f75296443a0df9fe7f25e052e62652 (diff) | |
| download | linux-41b3cf08cd5e7915293f3784ab649d48bb142153.tar.gz linux-41b3cf08cd5e7915293f3784ab649d48bb142153.tar.bz2 linux-41b3cf08cd5e7915293f3784ab649d48bb142153.zip | |
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>
Diffstat (limited to 'drivers/scsi/hpsa.c')
| -rw-r--r-- | drivers/scsi/hpsa.c | 17 |
1 files changed, 16 insertions, 1 deletions
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) |