[v2] scftorture: Avoid kfree from IRQ context.

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

Posted by Sebastian Andrzej Siewior 2 weeks, 2 days ago

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.

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

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

Posted by Paul E. McKenney 2 weeks, 2 days ago

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@kernel.org>

> 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
>