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Date: Mon, 30 Jun 2025 15:33:43 +0200
From: Christoph Hellwig <hch@lst.de>
To: Ben Copeland <ben.copeland@linaro.org>
Cc: linux-kernel@vger.kernel.org, lkft-triage@lists.linaro.org,
	regressions@lists.linux.dev, linux-nvme@lists.infradead.org,
	Dan Carpenter <dan.carpenter@linaro.org>, kbusch@kernel.org,
	axboe@kernel.dk, hch@lst.de, sagi@grimberg.me,
	iommu@lists.linux.dev
Subject: Re: next-20250627: IOMMU DMA warning during NVMe I/O completion
 after 06cae0e3f61c
Message-ID: <20250630133343.GA26040@lst.de>
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User-Agent: Mutt/1.5.17 (2007-11-01)

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.