From: Nitesh Narayan Lal <nitesh@redhat.com>
To: linux-kernel@vger.kernel.org, linux-scsi@vger.kernel.org,
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Subject: [PATCH v2 11/14] scsi: lpfc: Use irq_set_affinity
Date: Tue, 29 Jun 2021 11:27:43 -0400 [thread overview]
Message-ID: <20210629152746.2953364-12-nitesh@redhat.com> (raw)
In-Reply-To: <20210629152746.2953364-1-nitesh@redhat.com>
The driver uses irq_set_affinity_hint to set the affinity for the lpfc
interrupts to a mask corresponding to the local NUMA node to avoid
performance overhead on AMD architectures.
However, irq_set_affinity_hint() setting the affinity is an undocumented
side effect that this function also sets the affinity under the hood.
To remove this side effect irq_set_affinity_hint() has been marked as
deprecated and new interfaces have been introduced.
Also, as per the commit dcaa21367938 ("scsi: lpfc: Change default IRQ model
on AMD architectures"):
"On AMD architecture, revert the irq allocation to the normal style
(non-managed) and then use irq_set_affinity_hint() to set the cpu affinity
and disable user-space rebalancing."
we don't really need to set the affinity_hint as user-space rebalancing for
the lpfc interrupts is not desired.
Hence, replace the irq_set_affinity_hint() with irq_set_affinity() which
only applies the affinity for the interrupts.
Signed-off-by: Nitesh Narayan Lal <nitesh@redhat.com>
---
drivers/scsi/lpfc/lpfc_init.c | 4 +---
1 file changed, 1 insertion(+), 3 deletions(-)
diff --git a/drivers/scsi/lpfc/lpfc_init.c b/drivers/scsi/lpfc/lpfc_init.c
index 5f018d02bf56..d6e48414018d 100644
--- a/drivers/scsi/lpfc/lpfc_init.c
+++ b/drivers/scsi/lpfc/lpfc_init.c
@@ -11360,7 +11360,7 @@ lpfc_irq_set_aff(struct lpfc_hba_eq_hdl *eqhdl, unsigned int cpu)
cpumask_clear(&eqhdl->aff_mask);
cpumask_set_cpu(cpu, &eqhdl->aff_mask);
irq_set_status_flags(eqhdl->irq, IRQ_NO_BALANCING);
- irq_set_affinity_hint(eqhdl->irq, &eqhdl->aff_mask);
+ irq_set_affinity(eqhdl->irq, &eqhdl->aff_mask);
}
/**
@@ -11649,7 +11649,6 @@ lpfc_sli4_enable_msix(struct lpfc_hba *phba)
for (--index; index >= 0; index--) {
eqhdl = lpfc_get_eq_hdl(index);
lpfc_irq_clear_aff(eqhdl);
- irq_set_affinity_hint(eqhdl->irq, NULL);
free_irq(eqhdl->irq, eqhdl);
}
@@ -11810,7 +11809,6 @@ lpfc_sli4_disable_intr(struct lpfc_hba *phba)
for (index = 0; index < phba->cfg_irq_chann; index++) {
eqhdl = lpfc_get_eq_hdl(index);
lpfc_irq_clear_aff(eqhdl);
- irq_set_affinity_hint(eqhdl->irq, NULL);
free_irq(eqhdl->irq, eqhdl);
}
} else {
--
2.27.0
next prev parent reply other threads:[~2021-06-29 15:30 UTC|newest]
Thread overview: 21+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-29 15:27 [PATCH v2 00/14] genirq: Cleanup the usage of irq_set_affinity_hint Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 01/14] genirq: Provide new interfaces for affinity hints Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 02/14] iavf: Use irq_update_affinity_hint Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 03/14] i40e: " Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 04/14] scsi: megaraid_sas: Use irq_set_affinity_and_hint Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 05/14] scsi: mpt3sas: " Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 06/14] RDMA/i40iw: Use irq_update_affinity_hint Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 07/14] enic: " Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 08/14] be2net: " Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 09/14] ixgbe: " Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 10/14] mailbox: " Nitesh Narayan Lal
2021-06-29 15:27 ` Nitesh Narayan Lal [this message]
2021-06-29 15:27 ` [PATCH v2 12/14] hinic: Use irq_set_affinity_and_hint Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 13/14] net/mlx5: Use irq_update_affinity_hint Nitesh Narayan Lal
2021-06-29 15:27 ` [PATCH v2 14/14] net/mlx4: " Nitesh Narayan Lal
2021-07-08 19:24 ` [PATCH v2 00/14] genirq: Cleanup the usage of irq_set_affinity_hint Nitesh Lal
2021-07-11 11:31 ` Leon Romanovsky
2021-07-12 14:13 ` Nitesh Lal
2021-07-12 21:27 ` Nitesh Lal
2021-07-13 5:01 ` Leon Romanovsky
2021-07-13 13:29 ` Nitesh Lal
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