Re: [PATCH v2 0/3] scftorture: Avoid kfree from IRQ context.

From: Paul E. McKenney
Date: Thu Nov 07 2024 - 14:07:01 EST


On Thu, Nov 07, 2024 at 12:13:05PM +0100, Sebastian Andrzej Siewior wrote:
> Hi,
>
> Paul reported kfree from IRQ context in scftorture which is noticed by
> lockdep since the recent PROVE_RAW_LOCK_NESTING switch.
>
> The last patch in this series adresses the issues, the other things
> happened on the way.

For the series:

Tested-by: Paul E. McKenney <paulmck@xxxxxxxxxx>

> v1…v2:
> - Remove kfree_bulk(). I get more invocations per report without it.
> - Pass `cpu' to scf_cleanup_free_list in scftorture_invoker() instead
> of scfp->cpu. The latter is the thread number which can be larger
> than the number CPUs leading to a crash in such a case. Reported by
> Boqun Feng.
> - Clean up the per-CPU lists on module exit. Reported by Boqun Feng.
>
> Sebastian
>