[Bug 109692] deadlock occurs during GPU reset

https://bugs.freedesktop.org/show_bug.cgi?id=109692

--- Comment #7 from Tom St Denis tom.stdenis@amd.com --- Hi from Reddit!

I don't see the attached umr output in the bugzilla report. Though it looks like Andrey (who is on my team) is looking at it.

It looks like an unhandled (or just bad) VM fault is locking up the GFX ring and then a reset occurs which then brings up your lockdep.

So it's really two bugs (or 1 and a half)

1. GPU hang due to VM fault 2. GPU reset not working properly

The VM fault shouldn't lock up the GPU though even if it's the applications fault (which does happen).

The VM fault could be because of a bug in the kernel processing a CS, could be from the UMD (mesa/etc), or could be from the application itself.