From: Vasant Hegde <vasant.hegde@amd.com>
To: lirongqing <lirongqing@baidu.com>, Joerg Roedel <joro@8bytes.org>,
Suravee Suthikulpanit <suravee.suthikulpanit@amd.com>,
Will Deacon <will@kernel.org>,
Robin Murphy <robin.murphy@arm.com>,
iommu@lists.linux.dev, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] iommu/amd: Add NUMA node affinity for IOMMU log buffers
Date: Mon, 23 Feb 2026 11:49:42 +0530 [thread overview]
Message-ID: <9a940db6-80a7-4c6c-8138-0b4d85f6a402@amd.com> (raw)
In-Reply-To: <20260211035839.1970-1-lirongqing@baidu.com>
On 2/11/2026 9:28 AM, lirongqing wrote:
> From: Li RongQing <lirongqing@baidu.com>
>
> Currently, PPR Log and GA logs for AMD IOMMU are allocated using
> iommu_alloc_pages_sz(), which does not account for NUMA affinity. This can
> lead to remote memory access latencies if the memory is allocated on a
> different node than the IOMMU hardware.
>
> Switch to iommu_alloc_pages_node_sz() to ensure that these data structures
> are allocated on the same NUMA node as the IOMMU device. If the node
> information is unavailable, it defaults to NUMA_NO_NODE.
>
> Signed-off-by: Li RongQing <lirongqing@baidu.com>
Reviewed-by: Vasant Hegde <vasant.hegde@amd.com>
-Vasant
next prev parent reply other threads:[~2026-02-23 6:19 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-02-11 3:58 lirongqing
2026-02-16 4:19 ` Ankit Soni
2026-02-23 6:19 ` Vasant Hegde [this message]
2026-03-17 12:26 ` Joerg Roedel
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