linux-kernel - Re: next-20250627: IOMMU DMA warning during NVMe I/O completion after 06cae0e3f61c

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Message-ID: <20250630133343.GA26040@lst.de>
Date: Mon, 30 Jun 2025 15:33:43 +0200
From: Christoph Hellwig <hch@....de>
To: Ben Copeland <ben.copeland@...aro.org>
Cc: linux-kernel@...r.kernel.org, lkft-triage@...ts.linaro.org,
	regressions@...ts.linux.dev, linux-nvme@...ts.infradead.org,
	Dan Carpenter <dan.carpenter@...aro.org>, kbusch@...nel.org,
	axboe@...nel.dk, hch@....de, sagi@...mberg.me,
	iommu@...ts.linux.dev
Subject: Re: next-20250627: IOMMU DMA warning during NVMe I/O completion
 after 06cae0e3f61c

Hi Ben,

> [   32.857521] iommu_dma_unmap_page+0xc4/0xe8 (P)

Can you resolve this to a source location for me. i.e.

gdb vmlinux

l *(iommu_dma_unmap_page+0xc4)

Also what IOMMU driver is this device using?  It looks like it
might not support a 4k IOMMU page size.