<html> <head> <base href="https://bugs.freedesktop.org/"> </head> <body> <div> <a class="bz_bug_link bz_status_NEW " title="NEW - [v4.13 ARCH] GPU HANG: DMAR: DRHD: handling fault status reg 3 (arch reverted the use of intel_iommu=igfx_off)" href="https://bugs.freedesktop.org/show_bug.cgi?id=103076#c22">Comment # 22</a> on <a class="bz_bug_link bz_status_NEW " title="NEW - [v4.13 ARCH] GPU HANG: DMAR: DRHD: handling fault status reg 3 (arch reverted the use of intel_iommu=igfx_off)" href="https://bugs.freedesktop.org/show_bug.cgi?id=103076">bug 103076</a> from <a class="email" href="mailto:carstenmattner@gmail.com" title="Carsten Mattner <carstenmattner@gmail.com>"> Carsten Mattner</a> <pre>With that drm-tip kernel I can so far report the following, which isn't a GPU hang, but looks like simple bug: workqueue: PF_MEMALLOC task 41(khugepaged) is flushing !WQ_MEM_RECLAIM i915-userptr-release: (null) WARNING: CPU: 3 PID: 41 at kernel/workqueue.c:2440 check_flush_dependency+0xe8/0xf0 [12787.495230] Call Trace: [12787.495236] flush_workqueue+0x110/0x3c0 [12787.495242] ? finish_task_switch+0x70/0x1f0 [12787.495273] ? i915_gem_userptr_mn_invalidate_range_start+0x13f/0x150 [i915] [12787.495296] i915_gem_userptr_mn_invalidate_range_start+0x13f/0x150 [i915] [12787.495303] __mmu_notifier_invalidate_range_start+0x4a/0x70 [12787.495307] try_to_unmap_one+0x715/0x790 [12787.495311] rmap_walk_file+0xe4/0x230 [12787.495314] try_to_unmap+0x8e/0xe0 [12787.495317] ? page_remove_rmap+0x260/0x260 [12787.495319] ? page_not_mapped+0x10/0x10 [12787.495322] ? page_get_anon_vma+0x90/0x90 [12787.495325] migrate_pages+0x6d7/0x9a0 [12787.495329] ? isolate_freepages_block+0x320/0x320 [12787.495332] ? __ClearPageMovable+0x10/0x10 [12787.495335] compact_zone+0x568/0x660 [12787.495337] compact_zone_order+0x9b/0xc0 [12787.495341] ? try_to_compact_pages+0xb2/0x220 [12787.495344] try_to_compact_pages+0xb2/0x220 [12787.495348] __alloc_pages_direct_compact+0x45/0xe0 [12787.495351] __alloc_pages_slowpath+0xa66/0xc00 [12787.495354] ? finish_task_switch+0x70/0x1f0 [12787.495358] ? del_timer_sync+0x30/0x40 [12787.495361] ? schedule_timeout+0x177/0x2b0 [12787.495364] __alloc_pages_nodemask+0x1ab/0x1d0 [12787.495368] ? wait_woken+0x80/0x80 [12787.495372] khugepaged+0x296/0x1770 [12787.495375] ? wait_woken+0x80/0x80 [12787.495379] ? collapse_shmem.isra.39+0xa30/0xa30 [12787.495381] kthread+0x10d/0x130 [12787.495384] ? kthread_create_on_node+0x60/0x60 [12787.495387] ret_from_fork+0x22/0x30</pre> </div> <hr> You are receiving this mail because: <ul> <li>You are the assignee for the bug.</li> <li>You are on the CC list for the bug.</li> <li>You are the QA Contact for the bug.</li> </ul> </body> </html>