[Bug 109234] amdgpu random hangs with 4.21+

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Comment # 11 on bug 109234 from
I've been running into this issue multiple times a day. I noticed I hit the
OOPS a lot more frequent when my system was under load (e.g. compiling a
kernel) and then opening a new tab in Firefox. 

Don't ask me how, but eventually I figured out I could reproduce the problem
reliably on my system by starting many instances of my terminal emulator until
I hit the OOM killer.

v4.20 (good): OOM Killer kills processes and/or my user session and I can login
again.
v5.0-rc1 (bad): System hangs with OOPS in dmesg.

So I started bisecting, result attached.

I have not been able to reproduce after reverting parent merge commit
[af7ddd8a627c62a835524b3f5b471edbbbcce025]
and these related commits:
06f55fd2d22742ed7e725124dfea68936d12ce40
2e05ea5cdc1ac55d9ef678ed5ea6c38acf7fd2a3
d7076f07840851bbe57cb21ba052d6a4a9b1efa9
4788ba5792cc1368ba4867e1488dc168b4fe97b7
ed6ccf10f24bdfc1955bc8b976ddedc370fc3869

See the full tree here: https://github.com/SibrenVasse/linux/tree/revert

Hope this helps!


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