linux-kernel - Re: [next-20230322] Kernel WARN at kernel/workqueue.c:3182 (rcutorture)

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Message-ID: <bed6b499-76cc-4412-8a4d-c71f03276726@paulmck-laptop>
Date:   Thu, 23 Mar 2023 20:32:40 -0700
From:   "Paul E. McKenney" <paulmck@...nel.org>
To:     Sachin Sant <sachinp@...ux.ibm.com>
Cc:     linuxppc-dev <linuxppc-dev@...ts.ozlabs.org>,
        linux-next@...r.kernel.org,
        open list <linux-kernel@...r.kernel.org>,
        Zqiang <qiang1.zhang@...el.com>
Subject: Re: [next-20230322] Kernel WARN at kernel/workqueue.c:3182
 (rcutorture)

On Fri, Mar 24, 2023 at 08:47:38AM +0530, Sachin Sant wrote:
> 
> >>> Hello, Sachin, and it looks like you hit something that Zqiang and I
> >>> have been tracking down.  I am guessing that you were using modprobe
> >>> and rmmod to make this happen, and that this happened at rmmod time.
> >>> 
> >> Yes, the LTP test script rcu_torture.sh relies on modprobe to load/unload
> >> the rcutorture module.
> >> 
> >>> Whatever the reproducer, does the following patch help?
> >> 
> >> Thank you for the patch. Yes, with this patch applied, the test completes
> >> successfully without the reported warning.
> > 
> > Very good, thank you!  May we have your Tested-by?
> 
> Tested-by: Sachin Sant <sachinp@...ux.ibm.com>


Thank you, and I will apply on the next rebase.

							Thanx, Paul