>From Upstream:

"> Here is the dump before stress is started:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1627108/+attachment/4760437/+files/dump_nonbuggy

This one is ok.
The dump indicates Sched Debug Version: v0.11, 4.8.0-11-generic
so this is without the culprit commit

> Here it is after:
> https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1627108/+attachment/4760436/+files/dump_buggy

This one has the exact same odds values for system.slice->tg_load_avg
than the 1st dump that you sent yesterday
The dump indicates Sched Debug Version: v0.11, 4.8.0-22-generic #24-Ubuntu
So this dump has been done with a different kernel than for the dump above.
As I can't find any stress task in the dump, i tend to believe that
the dump has been done before starting the stress tasks and not after
starting them. Can you confirm ?

If i'm right, it mean that the problem was already there before
starting stress tasks."

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  X1Carbon comes to a crawl during high CPU usage tasks

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