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I am Chaitanya from the linux graphics team in Intel. This mail is regarding a regression we are seeing in our CI runs[1] on linux-next repository. Since the version next-20251106 [2], we are seeing our tests timing out presumably caused by a GPU Hang. ````````````````````````````````````````````````````````````````````````````````` <6> [490.872058] i915 0000:00:02.0: [drm] Got hung context on vcs0 with active request 939:2 [0x1004] not yet started <6> [490.875244] i915 0000:00:02.0: [drm] GPU HANG: ecode 12:4:baffffff <7> [496.424189] i915 0000:00:02.0: [drm:intel_guc_context_reset_process_msg [i915]] GT1: GUC: Got context reset notification: 0x1004 on vcs0, exiting = no, banned = no <6> [496.921551] i915 0000:00:02.0: [drm] Got hung context on vcs0 with active request 939:2 [0x1004] not yet started <6> [496.924799] i915 0000:00:02.0: [drm] GPU HANG: ecode 12:4:baffffff <4> [499.946641] [IGT] Per-test timeout exceeded. Killing the current test with SIGQUIT. ````````````````````````````````````````````````````````````````````````````````` Details log can be found in [3]. After bisecting the tree, the following patch [4] seems to be the first "bad" commit ````````````````````````````````````````````````````````````````````````````````````````````````````````` commit d373449d8e97891434db0c64afca79d903c1194e Author: Jason Gunthorpe jgg@nvidia.com Date: Thu Oct 23 15:22:36 2025 -0300 iommu/vt-d: Use the generic iommu page table ````````````````````````````````````````````````````````````````````````````````````````````````````````` We could not revert the patch because of merge issues but resetting to the parent[5] of the commit seems to fix the issue. Could you please check why the patch causes this regression and provide a fix if necessary? Thank you. Regards Chaitanya [1] https://intel-gfx-ci.01.org/tree/linux-next/combined-alt.html? [2] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20251106 [3] https://intel-gfx-ci.01.org/tree/linux-next/next-20251106/bat-arlh-2/dmesg0.txt [4] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20251106&id=d373449d8e97891434db0c64afca79d903c1194e [5] https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?h=next-20251106&id=ef7bfe5bbffdcfa033beeeb068c6317f71730679