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<b><a class="bz_bug_link
bz_status_NEW "
title="NEW - "BUG: unable to handle kernel paging request at 0000000000002000" in amdgpu_vm_cpu_set_ptes at amdgpu_vm.c:921"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107065#c8">Comment # 8</a>
on <a class="bz_bug_link
bz_status_NEW "
title="NEW - "BUG: unable to handle kernel paging request at 0000000000002000" in amdgpu_vm_cpu_set_ptes at amdgpu_vm.c:921"
href="https://bugs.freedesktop.org/show_bug.cgi?id=107065">bug 107065</a>
from <span class="vcard"><a class="email" href="mailto:andrey.grodzovsky@amd.com" title="Andrey Grodzovsky <andrey.grodzovsky@amd.com>"> <span class="fn">Andrey Grodzovsky</span></a>
</span></b>
<pre>(In reply to dwagner from <a href="show_bug.cgi?id=107065#c7">comment #7</a>)
<span class="quote">> (In reply to Andrey Grodzovsky from <a href="show_bug.cgi?id=107065#c6">comment #6</a>)
> > So with Arch Linux kernel it happens only during S3 but with
> > amd-staging-drm-next it happens once you start X ?
>
> Yes. I know it sounds strange, but it's currently 100% reproducible to me:
>
> Booting linux-4.17.2-ARCH with amdgpu.vm_update_mode=0:
> X11 starts fine, but system crashes after minutes of firefox browsing
>
> Booting linux-4.17.2-ARCH with amdgpu.vm_update_mode=3:
> X11 starts fine, system does not crash (for at least hours of use)
> but crashes as above if resumed from S3 sleep
>
> Booting linux compiled from amd-staging-drm-next, as of commit
> 527d6e839a0e52b744fd092453544e4f58977334 from yesterday, with
> amdgpu.vm_update_mode=0:
> X11 starts fine, but system crashes after minutes of firefox browsing
>
> Booting linux compiled from amd-staging-drm-next, as of commit
> 527d6e839a0e52b744fd092453544e4f58977334 from yesterday, with
> amdgpu.vm_update_mode=3:
> X11 does not start, crashes immediately with the same above pasted kernel
> BUG message and backtrace
>
>
> So something with CPU-based vm_update_mode is broken, but in a different way
> than the SDMA-based method.
>
> I will change the subject of this report to reflect that this crash is not
> necessarily S3-resume-related.</span >
I am going to try and reproduce the crash with CPU update mode here, please
describe exactly what ASIC are you using ?</pre>
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