[5.13-rc1][bug] often hangs for no reason

[Borislav Petkov]

On Mon, May 17, 2021 at 03:27:23AM +0500, Mikhail Gavrilov wrote:
> Hi folks.
> 5.13-rc1 after 5.13-rc0 is a disaster because it hangs and hangs again
> after reboot.
> All hang's have in common is that they all happens in
> smp_call_function_many_cond function (I compared all trace [1], [2],
> [3], [4], [5])
> I do not know if this is a known problem or not, so I'm reporting here.

Looks like some splat, lockdep probably, in amdgpu when it gets loaded.
Maybe locking's botched although the beginning of the splats is missing
for whatever reason...

Adding them to Cc in case they have a better idea.

> Full logs here:
> [1] https://pastebin.com/u7SkKGDT
> [2] https://pastebin.com/fNae4dSL
> [3] https://pastebin.com/jEDMjQDy
> [4] https://pastebin.com/vEMhWGgE
> [5] https://pastebin.com/fvWx5ctR
> 

-- 
Regards/Gruss,
    Boris.

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