Re: [PATCH -tip/core/rcu 1/6] Cleanups and fixes for RCU in face of heavy CPU-hotplug stress

Josh Triplett
2009-08-17T18:24:38Z

On Sat, 2009-08-15 at 09:51 -0700, Paul E. McKenney wrote:
> These pass tests combining rcutorture and continuous CPU-hotplug
> operations, in other words, no sleeping between successive CPU-hotplug
> operations. This set does not fix the bug involving deadlocks through
> rcutorture, kthread_stop(), and migration threads. However, this bug
> does not affect production systems, so should not stand in the way of
> applying these patches.

Commit 63706172f332fd3f6e7458ebfb35fa6de9c21dc5, "kthreads: rework
kthread_stop()", looks like it fixes kthread_stop to work concurrently.
That may fix the issue you observed.

- Josh Triplett