[Bug 108456] VulkanCTS 1.1.2 Kernel error: dEQP-VK.pipeline.render_to_image.core.cube_array.huge.width_height_layers

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=108456

--- Comment #4 from Daniel Vetter <daniel at ffwll.ch> ---
Smells like deadlock in userptr. Tons of backtraces stuck in places where most
likely they want to acquire the dev->struct_mutex, except one:

[<0>] 0xffffffffffffffff
/proc/16502
/tmp/build_root/m64/opt/deqp/modules/vulkan/deqp-vk�--deqp-log-images=disable�--deqp-gl-config-name=rgba8888d24s8�--deqp-surface-width=400�--deqp-surface-height=300�--deqp-visibility=hidden�--deqp-surface-type=fbo�--deqp-shadercache=disable�--deqp-log-filename=TestResults-6.qpa�--deqp-caselist-file=mesa-ci-caselist-6.txt�[<0>]
flush_workqueue+0x132/0x420
[<0>] i915_gem_userptr_mn_invalidate_range_start+0x174/0x1d0 [i915]
[<0>] __mmu_notifier_invalidate_range_start+0x4f/0x70
[<0>] try_to_unmap_one+0x894/0x960
[<0>] rmap_walk_file+0xec/0x240
[<0>] try_to_unmap+0x93/0xf0
[<0>] migrate_pages+0x7be/0xaa0
[<0>] compact_zone+0x5d9/0x860
[<0>] compact_zone_order+0xa0/0xd0
[<0>] try_to_compact_pages+0xa5/0x250
[<0>] __alloc_pages_direct_compact+0x4a/0xf0
[<0>] __alloc_pages_slowpath+0x462/0xd80
[<0>] __alloc_pages_nodemask+0x233/0x250
[<0>] setup_scratch_page+0xfd/0x240 [i915]
[<0>] i915_ppgtt_create+0xad/0xa10 [i915]
[<0>] i915_gem_create_context+0x254/0x440 [i915]
[<0>] i915_gem_context_create_ioctl+0x55/0x100 [i915]
[<0>] drm_ioctl_kernel+0x59/0xb0 [drm]
[<0>] drm_ioctl+0x2cb/0x380 [drm]
[<0>] do_vfs_ioctl+0xa1/0x610
[<0>] SyS_ioctl+0x74/0x80
[<0>] entry_SYSCALL_64_fastpath+0x24/0x87
[<0>] 0xffffffffffffffff

Well I lied, there's more than one stuck on that flush_workqueue():

[<0>] 0xffffffffffffffff
/proc/65
[<0>] flush_workqueue+0x132/0x420
[<0>] i915_gem_userptr_mn_invalidate_range_start+0x174/0x1d0 [i915]
[<0>] __mmu_notifier_invalidate_range_start+0x4f/0x70
[<0>] try_to_unmap_one+0x894/0x960
[<0>] rmap_walk_file+0xec/0x240
[<0>] try_to_unmap+0x93/0xf0
[<0>] migrate_pages+0x7be/0xaa0
[<0>] compact_zone+0x5d9/0x860
[<0>] compact_zone_order+0xa0/0xd0
[<0>] try_to_compact_pages+0xa5/0x250
[<0>] __alloc_pages_direct_compact+0x4a/0xf0
[<0>] __alloc_pages_slowpath+0x462/0xd80
[<0>] __alloc_pages_nodemask+0x233/0x250
[<0>] khugepaged+0xb4d/0x2060
[<0>] kthread+0x111/0x130
[<0>] ret_from_fork+0x35/0x40

I think this is one for Tvrtko and Chris.

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