linux-kernel - Re: [PATCH v3 0/4] scftorture: Avoid kfree from IRQ context.

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Message-ID: <Zy5OX5Wy0LsFPdjO@Boquns-Mac-mini.local>
Date: Fri, 8 Nov 2024 09:46:07 -0800
From: Boqun Feng <boqun.feng@...il.com>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, "Paul E. McKenney" <paulmck@...nel.org>,
	Marco Elver <elver@...gle.com>,
	Peter Zijlstra <peterz@...radead.org>,
	Tomas Gleixner <tglx@...utronix.de>,
	Vlastimil Babka <vbabka@...e.cz>, akpm@...ux-foundation.org,
	cl@...ux.com, iamjoonsoo.kim@....com, longman@...hat.com,
	penberg@...nel.org, rientjes@...gle.com, sfr@...b.auug.org.au
Subject: Re: [PATCH v3 0/4] scftorture: Avoid kfree from IRQ context.

On Fri, Nov 08, 2024 at 11:39:30AM +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.
> 
> v2...v3:
>   - The clean up on module exit must not be done with thread numbers.
>     Reported by Boqun Feng.
>   - Move the clean up on module exit prior to torture_cleanup_end().
>     Reported by Paul.
> 
> 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
> 

For the whole series:

Reviewed-by: Boqun Feng <boqun.feng@...il.com>
Tested-by: Boqun Feng <boqun.feng@...il.com>

Regards,
Boqun