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Subject: Re: [next-20230322] Kernel WARN at kernel/workqueue.c:3182
 (rcutorture)
From:   Sachin Sant <sachinp@linux.ibm.com>
In-Reply-To: <ae015179-03b5-4e4b-86dd-cbab75230c7f@paulmck-laptop>
Date:   Fri, 24 Mar 2023 08:47:38 +0530
Cc:     linuxppc-dev <linuxppc-dev@lists.ozlabs.org>,
        linux-next@vger.kernel.org,
        open list <linux-kernel@vger.kernel.org>,
        Zqiang <qiang1.zhang@intel.com>
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Message-Id: <23F7ADE0-0B96-4257-8910-6B678E0F0C7A@linux.ibm.com>
References: <139BEB3F-BC1C-4ABA-8928-9A8EF3FB5EDD@linux.ibm.com>
 <fbb628c1-08bd-44ff-a613-794b134f6d46@paulmck-laptop>
 <233B28DA-70DD-4AD8-9C72-1FFCA6EFE56D@linux.ibm.com>
 <ae015179-03b5-4e4b-86dd-cbab75230c7f@paulmck-laptop>
To:     "Paul E. McKenney" <paulmck@kernel.org>
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>>> 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@linux.ibm.com>

- Sachin