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

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Message-ID: <b9079817-72bf-4f6f-ad4a-b423a7d2e0b4@paulmck-laptop>
Date: Thu, 7 Nov 2024 11:05:24 -0800
From: "Paul E. McKenney" <paulmck@...nel.org>
To: Sebastian Andrzej Siewior <bigeasy@...utronix.de>
Cc: kasan-dev@...glegroups.com, linux-kernel@...r.kernel.org,
	linux-mm@...ck.org, Boqun Feng <boqun.feng@...il.com>,
	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 v2 0/3] scftorture: Avoid kfree from IRQ context.

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@...nel.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
>