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From: Nitesh Narayan Lal <nitesh@redhat.com>
To: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
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Subject: [PATCH v5 04/14] scsi: megaraid_sas: Use irq_set_affinity_and_hint
Date: Tue, 20 Jul 2021 19:26:14 -0400	[thread overview]
Message-ID: <20210720232624.1493424-5-nitesh@redhat.com> (raw)
In-Reply-To: <20210720232624.1493424-1-nitesh@redhat.com>

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()
where the provided mask needs to be applied as the affinity and
affinity_hint pointer needs to be set and replace with
irq_update_affinity_hint() where 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@redhat.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 ec10b2497310..836a1b13f71b 100644
--- a/drivers/scsi/megaraid/megaraid_sas_base.c
+++ b/drivers/scsi/megaraid/megaraid_sas_base.c
@@ -5718,7 +5718,7 @@ 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]);
@@ -5761,7 +5761,7 @@ 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]);
@@ -5892,22 +5892,25 @@ 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);
+		}
 	}
 }
 
@@ -5996,7 +5999,7 @@ 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


  parent reply	other threads:[~2021-07-20 23:38 UTC|newest]

Thread overview: 28+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-07-20 23:26 [PATCH v5 00/14] genirq: Cleanup the abuse of irq_set_affinity_hint() Nitesh Narayan Lal
2021-07-20 23:26 ` [PATCH v5 01/14] genirq: Provide new interfaces for affinity hints Nitesh Narayan Lal
2021-08-06 15:51   ` Ming Lei
2021-07-20 23:26 ` [PATCH v5 02/14] iavf: Use irq_update_affinity_hint Nitesh Narayan Lal
2021-07-20 23:26 ` [PATCH v5 03/14] i40e: " Nitesh Narayan Lal
2021-07-20 23:26 ` Nitesh Narayan Lal [this message]
2021-08-06 11:31   ` [PATCH v5 04/14] scsi: megaraid_sas: Use irq_set_affinity_and_hint Sumit Saxena
2021-07-20 23:26 ` [PATCH v5 05/14] scsi: mpt3sas: " Nitesh Narayan Lal
2021-08-06  8:54   ` Sreekanth Reddy
2021-07-20 23:26 ` [PATCH v5 06/14] RDMA/irdma: Use irq_update_affinity_hint Nitesh Narayan Lal
2021-07-22 18:25   ` Nikolova, Tatyana E
2021-07-20 23:26 ` [PATCH v5 07/14] enic: " Nitesh Narayan Lal
2021-08-16 17:53   ` Christian Benvenuti (benve)
2021-07-20 23:26 ` [PATCH v5 08/14] be2net: " Nitesh Narayan Lal
2021-07-20 23:26 ` [PATCH v5 09/14] ixgbe: " Nitesh Narayan Lal
2021-07-20 23:26 ` [PATCH v5 10/14] mailbox: " Nitesh Narayan Lal
2021-08-16 18:11   ` Jassi Brar
2021-07-20 23:26 ` [PATCH v5 11/14] scsi: lpfc: Use irq_set_affinity Nitesh Narayan Lal
2021-07-23 17:15   ` James Smart
2021-07-20 23:26 ` [PATCH v5 12/14] hinic: Use irq_set_affinity_and_hint Nitesh Narayan Lal
2021-07-20 23:26 ` [PATCH v5 13/14] net/mlx5: " Nitesh Narayan Lal
2021-07-20 23:26 ` [PATCH v5 14/14] net/mlx4: Use irq_update_affinity_hint Nitesh Narayan Lal
2021-08-02 15:26 ` [PATCH v5 00/14] genirq: Cleanup the abuse of irq_set_affinity_hint() Nitesh Lal
2021-08-06  3:04   ` Martin K. Petersen
2021-08-06 14:56     ` Nitesh Lal
2021-08-16 15:50   ` Nitesh Lal
2021-08-30 15:38     ` Nitesh Lal
2021-08-30 15:40       ` Nitesh Lal

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