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[2003:ec:a748:c8fc:21d:81db:5457:1dff]) by smtp.gmail.com with ESMTPSA id 5b1f17b1804b1-4a00d46548fsm39832425e9.4.2026.09.29.01.01.36 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 29 Sep 2026 01:01:36 -0700 (PDT) From: Andreas Wild To: Thorsten Leemhuis Cc: "Maciej W. Rozycki" , Bjorn Helgaas , Bjorn Helgaas , linux-pci@vger.kernel.org, linux-kernel@vger.kernel.org, regressions@lists.linux.dev, M M , blaat windows , edwardmalik95@icloud.com Subject: Re: [PATCH v3] PCI: Skip Target Speed quirk on clamped ports with no link Date: Tue, 29 Sep 2026 09:59:16 +0200 Message-ID: <20260929080109.53944-1-andiwild@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: <87c93553-d74d-4588-bd54-0ccb2728f327@leemhuis.info> References: <20260801201244.4421-1-andiwild@gmail.com> <20260917233355.GA1115024@bhelgaas> <1b2cceea-8da4-4239-a955-e0c6b475a227@leemhuis.info> <87c93553-d74d-4588-bd54-0ccb2728f327@leemhuis.info> Precedence: bulk X-Mailing-List: linux-pci@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: 8bit On Tue, 29 Sep 2026, Thorsten Leemhuis wrote: > No reason given, just a link to a diagnostic file that from a very quick > look showed an Oops from the Nvidia driver: > https://paste.cachyos.org/p/49a2487.log > > So maybe it's a problem in that OOT driver, maybe not. [...] I had a look at that log, and I don't think it points at the patch. It covers two boots, both on the same 7.2.2-1-cachyos build, which carries the patch. The second one, from which the report was taken, came up normally. In the failing boot the NVIDIA driver fails to initialise the GPU ("RmInitAdapter failed! (0x24:0x72:1281)"), and about a second later modprobe takes a general protection fault in __refill_objects_node(), reached from mas_preallocate(): an object still on the maple_node free list had a zeroed free pointer, as if it had been allocated or written to while still free. The journal ends a second after that, so this is presumably the hang the revert mentions. That looks like slab corruption, which usually shows up in a victim rather than the culprit, so the lack of NVIDIA frames in the trace doesn't clear the driver: its failed-init teardown reported leaked objects just before. Another candidate is 4a724bcf5d70 ("mm/slab: take n->list_lock in __slab_try_return_freelist() to avoid race"), which only reached stable in 7.2.7. Nothing in the log implicates the patch, but it can't clear it either: the patch's early return is silent, and the report only has warnings and errors from the failing boot. One unexplained difference between the boots: the r8169 NIC is at 33:00.0 in the failing one and at 30:00.0 in the good one. Best regards, Andreas