Re: INFO: task rcu_gp:3 blocked for more than 122 seconds.

[Borislav Petkov]

On Thu, Sep 29, 2022 at 08:37:22AM -0700, Paul E. McKenney wrote:
> As discussed on IRC, I got nuttin' on this one.  Looks like an RCU
> expedited grace period is stuck waiting for its workqueue kthread, and
> that this workqueue kthread is stuck for some reason.

Yeah, it is not that easy to repro - I need to wait a couple of minutes
after it boots. Look at the timestamps:

[  249.149378] INFO: task rcu_gp:3 blocked for more than 122 seconds.
^^^^^^^^^^^^^^

But it looks like sched/core is the culprit because merging it into
Linus master triggers it.

Lemme bisect that.

Stay tuned.

-- 
Regards/Gruss,
    Boris.

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