[Bug 112125] [regression, bisected] kworker consumes 100% of one CPU core after kernel upgrade from 5.2.* to 5.3.*

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=112125

--- Comment #6 from Imre Deak <imre.deak at intel.com> ---
(In reply to Jani Nikula from comment #5)
> (In reply to Lakshmi from comment #3)
> > @Imre, Is it worth trying to verify this issue with drmtip?
> > 
> > (In reply to Val Kulkov from comment #2)
> > > The regression was present in the mainline kernel as of 2019-10-24.
> > Val, can you attach the dmesg from boot with kernel parameters
> > drm.debug=0x1e log_buf_len=4M ?
> 
> Please do so for both the last good and the first bad commits.
> 
> Imre, any ideas why this would happen? I think we probably need to revert
> and get back to the drawing board with this one.

I can tell more if we get the logs. Reverting will be difficult because the ICL
TypeC functionality depends on it, so I'd like to first check the root cause.

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