Re: kworker/0:3+pm hogging CPU

Dirk Kostrewa
2020-09-04T15:57:32Z

Hi,

meanwhile, I convinced Dell that I have a hardware issue (and not a
Linux issue), and Dell has replaced the mainboard of my laptop. After
that, both the USB over-current kernel messages and the kworker
processes with permanent high CPU load are gone. So, this was indeed a
hardware issue!

Many thanks for your feedback and help!

Best regards,

Dirk.

Am 01.09.20 um 17:27 schrieb Michal Hocko:

> On Mon 31-08-20 14:37:10, Mathias Nyman wrote:
> [...]
>> I can't come up with any good solution to this right now.
>> Only bad ideas such as
>> a. Add a sleep to the over-current case,
>> doesn't solve anything else than the ~100% cpu hogging part of the problem
> This sounds like a better thing from the user space point of view. I do
> not have any insight on what kind of other side effects this might have
> so I didn't dare to try that on my piece of (broken) HW. I do not see
> the problem all the time and I plan to replace it soon anyway.
>
> Considering that tweaking the power management helps maybe that could be
> done automagically after many consecutive failures.
>
> Just my 2c