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<b><a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [iGVT-g][SKL] GPU Hang and iGVT-g guest crash under certain loads"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107475#c14">Comment # 14</a>
on <a class="bz_bug_link
bz_status_NEEDINFO "
title="NEEDINFO - [iGVT-g][SKL] GPU Hang and iGVT-g guest crash under certain loads"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107475">bug 107475</a>
from <span class="vcard"><a class="email" href="mailto:leozinho29_eu@hotmail.com" title="leozinho29_eu@hotmail.com">leozinho29_eu@hotmail.com</a>
</span></b>
<pre>Using kernel version
4.20.0-rc6-drm-tip-1f86f1fb70f082ed93450c328e518d8013d23953+ and Mesa
19.0.0-devel (git-7fe4e0ad5d), the Windows 10 guest is crashing with
(excessively?) heavy workloads:
Thousands of gvt: guest page write error until:
[24491.723061] gvt: guest page write error, gpa 7bf0ea60
[24491.723073] gvt: guest page write error, gpa 7bf0ea50
[24491.723111] gvt: guest page write error, gpa 7bf0ea40
[24491.723133] gvt: vgpu 1: fail: shadow page 00000000fe42efcf guest entry
0xc18166088b18458d type 8
[24491.723136] gvt: vgpu 1: fail: spt 0000000047b0f9c1 guest entry
0xc18166088b18458d type 8
[24491.723138] gvt: vgpu 1: fail: shadow page 0000000047b0f9c1 guest entry
0xc18166088b18458d type 8.
[24491.723140] gvt: guest page write error, gpa 7bf0ea38
More thousands of gvt: guest page write error until:
[24729.598263] gvt: guest page write error, gpa 7bf0efff
[24732.170539] gvt: vgpu 1: fail: shadow page 000000008652efc7 guest entry
0x616c430267006c61 type 7
[24732.170546] gvt: vgpu 1: fail: shadow page 0000000081a744b4 guest entry
0x616c430267006c61 type 7
[24732.170551] gvt: vgpu 1: fail: shadow page 0000000081a744b4 guest entry
0x7cd3a045 type 8
[24732.170554] gvt: vgpu 1: fail: spt 0000000047b0f9c1 guest entry 0x7cd3a045
type 8
[24732.170556] gvt: vgpu 1: fail: shadow page 0000000047b0f9c1 guest entry
0x7cd3a045 type 8.
[24732.170558] gvt: vgpu 1: fail to flush post shadow
[24732.170568] gvt: vgpu 1: fail to dispatch workload, skip
[24754.835553] gvt: vgpu mm pin count bug detected
And the iGVT-g guest crashes.
The host seems better as there are no longer GPU hangs happening on it, at
least I can't reproduce them, but the guest is still crashing, not as often as
before and only under heavy workloads.</pre>
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