| lists.openwall.net | lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC | |
|
Open Source and information security mailing list archives
| ||
|
Message-Id: <20210629152746.2953364-5-nitesh@redhat.com>
Date: Tue, 29 Jun 2021 11:27:36 -0400
From: Nitesh Narayan Lal <nitesh@...hat.com>
To: linux-kernel@...r.kernel.org, linux-scsi@...r.kernel.org,
intel-wired-lan@...ts.osuosl.org, netdev@...r.kernel.org,
linux-api@...r.kernel.org, linux-pci@...r.kernel.org,
tglx@...utronix.de, jesse.brandeburg@...el.com,
robin.murphy@....com, mtosatti@...hat.com, mingo@...nel.org,
jbrandeb@...nel.org, frederic@...nel.org, juri.lelli@...hat.com,
abelits@...vell.com, bhelgaas@...gle.com, rostedt@...dmis.org,
peterz@...radead.org, davem@...emloft.net,
akpm@...ux-foundation.org, sfr@...b.auug.org.au,
stephen@...workplumber.org, rppt@...ux.vnet.ibm.com,
chris.friesen@...driver.com, maz@...nel.org, nhorman@...driver.com,
pjwaskiewicz@...il.com, sassmann@...hat.com, thenzl@...hat.com,
kashyap.desai@...adcom.com, sumit.saxena@...adcom.com,
shivasharan.srikanteshwara@...adcom.com,
sathya.prakash@...adcom.com, sreekanth.reddy@...adcom.com,
suganath-prabu.subramani@...adcom.com, james.smart@...adcom.com,
dick.kennedy@...adcom.com, jkc@...hat.com, faisal.latif@...el.com,
shiraz.saleem@...el.com, tariqt@...dia.com, ahleihel@...hat.com,
kheib@...hat.com, borisp@...dia.com, saeedm@...dia.com,
benve@...co.com, govind@....com, jassisinghbrar@...il.com,
ajit.khaparde@...adcom.com, sriharsha.basavapatna@...adcom.com,
somnath.kotur@...adcom.com, nilal@...hat.com,
tatyana.e.nikolova@...el.com, mustafa.ismail@...el.com,
ahs3@...hat.com, leonro@...dia.com
Subject: [PATCH v2 04/14] scsi: megaraid_sas: Use irq_set_affinity_and_hint
The driver uses irq_set_affinity_hint() specifically for the high IOPS
queue interrupts for two purposes:
- To set the affinity_hint which is consumed by the userspace for
distributing the interrupts
- To apply an affinity that it provides
The driver enforces its own affinity to bind the high IOPS queue interrupts
to the local NUMA node. However, irq_set_affinity_hint() applying the
provided cpumask as an affinity for the interrupt is an undocumented side
effect.
To remove this side effect irq_set_affinity_hint() has been marked
as deprecated and new interfaces have been introduced. Hence, replace the
irq_set_affinity_hint() with the new interface irq_set_affinity_and_hint()
that clearly indicates the purpose of the usage and is meant to apply the
affinity and set the affinity_hint pointer. Also, replace
irq_set_affinity_hint() with irq_update_affinity_hint() when only
affinity_hint needs to be updated.
Change the megasas_set_high_iops_queue_affinity_hint function name to
megasas_set_high_iops_queue_affinity_and_hint to clearly indicate that the
function is setting both affinity and affinity_hint.
Signed-off-by: Nitesh Narayan Lal <nitesh@...hat.com>
---
drivers/scsi/megaraid/megaraid_sas_base.c | 27 +++++++++++++----------
1 file changed, 15 insertions(+), 12 deletions(-)
diff --git a/drivers/scsi/megaraid/megaraid_sas_base.c b/drivers/scsi/megaraid/megaraid_sas_base.c
index 4d4e9dbe5193..f59b99925830 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -5666,7 +5666,7 @@ megasas_setup_irqs_msix(struct megasas_instance *instance, u8 is_probe)
"Failed to register IRQ for vector %d.\n", i);
for (j = 0; j < i; j++) {
if (j < instance->low_latency_index_start)
- irq_set_affinity_hint(
+ irq_update_affinity_hint(
pci_irq_vector(pdev, j), NULL);
free_irq(pci_irq_vector(pdev, j),
&instance->irq_context[j]);
@@ -5709,7 +5709,7 @@ megasas_destroy_irqs(struct megasas_instance *instance) {
if (instance->msix_vectors)
for (i = 0; i < instance->msix_vectors; i++) {
if (i < instance->low_latency_index_start)
- irq_set_affinity_hint(
+ irq_update_affinity_hint(
pci_irq_vector(instance->pdev, i), NULL);
free_irq(pci_irq_vector(instance->pdev, i),
&instance->irq_context[i]);
@@ -5840,22 +5840,25 @@ int megasas_get_device_list(struct megasas_instance *instance)
}
/**
- * megasas_set_high_iops_queue_affinity_hint - Set affinity hint for high IOPS queues
- * @instance: Adapter soft state
- * return: void
+ * megasas_set_high_iops_queue_affinity_and_hint - Set affinity and hint
+ * for high IOPS queues
+ * @instance: Adapter soft state
+ * return: void
*/
static inline void
-megasas_set_high_iops_queue_affinity_hint(struct megasas_instance *instance)
+megasas_set_high_iops_queue_affinity_and_hint(struct megasas_instance *instance)
{
int i;
- int local_numa_node;
+ unsigned int irq;
+ const struct cpumask *mask;
if (instance->perf_mode == MR_BALANCED_PERF_MODE) {
- local_numa_node = dev_to_node(&instance->pdev->dev);
+ mask = cpumask_of_node(dev_to_node(&instance->pdev->dev));
- for (i = 0; i < instance->low_latency_index_start; i++)
- irq_set_affinity_hint(pci_irq_vector(instance->pdev, i),
- cpumask_of_node(local_numa_node));
+ for (i = 0; i < instance->low_latency_index_start; i++) {
+ irq = pci_irq_vector(instance->pdev, i);
+ irq_set_affinity_and_hint(irq, mask);
+ }
}
}
@@ -5944,7 +5947,7 @@ megasas_alloc_irq_vectors(struct megasas_instance *instance)
instance->msix_vectors = 0;
if (instance->smp_affinity_enable)
- megasas_set_high_iops_queue_affinity_hint(instance);
+ megasas_set_high_iops_queue_affinity_and_hint(instance);
}
/**
--
2.27.0
Powered by blists - more mailing lists