[Bug 101403] [IGT] gpu couldn't recovery after running drv_hangman in dom0

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=101403

--- Comment #6 from XiongZhang <xiong.y.zhang at intel.com> ---
I just install an upstream xen 4.9 and upstream 4.11 kernel, then use xen to
boot 4.11 kernel. Both of them don't contain any xen-gvt related code and I
don't boot a guest, so there is no vgpu emulation. In this case, i915 driver
access hw directly and doesn't trap into vgpu. I bisect the upstream 4.11
kernel through checking gpu recovery and found the above commit.

Then I tried drm-intel-nightly and found it has the same issue. Just now, I
boot drm-intel-nightly kernel to text mode using xen, then run drv_hangman, but
GPU still couldn't recovery. 
And through the dmesg, it is in full-ppgtt mode as dmesg output
"[i915_driver_load[i915]] ppgtt mode: 3"


(In reply to Chris Wilson from comment #4)
> What did you bisect? The failure of drv_hangman is quite normal for
> !full-ppgtt, which I presume is the result of the vgpu emulation. The hang
> of X is another issue unconnected to reset. You should not be running igt
> while anything else is accessing the gpu as most of the tests assume
> exclusive ownership of the device.

-- 
You are receiving this mail because:
You are the assignee for the bug.
You are on the CC list for the bug.
You are the QA Contact for the bug.
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <https://lists.freedesktop.org/archives/intel-gfx-bugs/attachments/20170614/b47da529/attachment-0001.html>