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[2003:f6:af49:8100:e5be:2e2b:db52:54b6]) by smtp.gmail.com with ESMTPSA id ffacd0b85a97d-42f7cbfeae9sm37425520f8f.13.2025.12.10.03.08.37 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 10 Dec 2025 03:08:38 -0800 (PST) Date: Wed, 10 Dec 2025 12:08:36 +0100 (CET) From: Sebastian Ott To: Keith Busch cc: linux-nvme@lists.infradead.org, iommu@lists.linux.dev, linux-block@vger.kernel.org, linux-kernel@vger.kernel.org, linux-xfs@vger.kernel.org, Jens Axboe , Christoph Hellwig , Will Deacon , Robin Murphy , Carlos Maiolino Subject: Re: WARNING: drivers/iommu/io-pgtable-arm.c:639 In-Reply-To: Message-ID: References: <170120f7-dd2c-4d2a-d6fc-ac4c82afefd7@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed On Wed, 10 Dec 2025, Keith Busch wrote: > On Tue, Dec 09, 2025 at 12:43:31PM +0100, Sebastian Ott wrote: >> got the following warning after a kernel update on Thurstday, leading to a >> panic and fs corruption. I didn't capture the first warning but I'm pretty >> sure it was the same. It's reproducible but I didn't bisect since it >> borked my fs. The only hint I can give is that v6.18 worked. Is this a >> known issue? Anything I should try? > > Could you check if your nvme device supports SGLs? There are some new > features in 6.19 that would allow merging IO that wouldn't have happened > before. You can check from command line: > > # nvme id-ctrl /dev/nvme0 | grep sgl # nvme id-ctrl /dev/nvme0n1 | grep sgl sgls : 0xf0002 Thanks, Sebastian