From: Otavio Salvador <otavio.salvador@ossystems.com.br>
To: benson_young@sercomm.com
Cc: meta-freescale@lists.yoctoproject.org
Subject: Re: [meta-freescale] linux-fslc 5.4.114: rcu_preempt detected stalls on IMX7D #dunfell #meta-freescale
Date: Tue, 11 Jan 2022 09:31:11 -0300 [thread overview]
Message-ID: <CAP9ODKqpFE9cEWX6POyU5EO2_45s7UVwOSEAgBk0FbUSpvTrxQ@mail.gmail.com> (raw)
In-Reply-To: <AzJM.1641895683786982194.qQoa@lists.yoctoproject.org>
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Hello,
Em ter., 11 de jan. de 2022 às 07:08, <benson_young@sercomm.com> escreveu:
> We are experiencing kernel crash when we are stress testing WiFi
> functionality over SDIO interface.
> please see attachment for kernel dump (near end of log)
> we have read that rcu_preempt dump are sometimes caused by spin lock used
> by driver when kernel has PREEMPT enabled.
> and suggested solution is making change as something below
> spin_unlock_irq(&signal->obj.wait.lock); --->
> raw_spin_unlock_irq(&signal->obj.wait.lock);
> spin_lock_irq(&signal->obj.wait.lock); ----->
> raw_spin_lock_irq(&signal->obj.wait.lock);
> however, the wireless driver on our platform doesn't use such calls.
>
> When we used the same wireless driver on official NXP BSP (gatesgarth),
> this issue isn't observed.
> Attaching the kernel configs for the two BSPs.
>
> Can anyone please advise on possible cause and solution?
>
> much appreciate the assistance and best regards,
>
You'll need to compare the branches and see if it has been fixed in a newer
kernel release.
--
Otavio Salvador O.S. Systems
http://www.ossystems.com.br http://code.ossystems.com.br
Mobile: +55 (53) 9 9981-7854 Mobile: +1 (347) 903-9750
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next parent reply other threads:[~2022-01-11 12:31 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <AzJM.1641895683786982194.qQoa@lists.yoctoproject.org>
2022-01-11 12:31 ` Otavio Salvador [this message]
2022-01-11 13:06 ` [meta-freescale] linux-fslc 5.4.114: rcu_preempt detected stalls on IMX7D #dunfell #meta-freescale Fabio Estevam
[not found] ` <16C93929407A6CAE.24574@lists.yoctoproject.org>
2022-01-11 14:05 ` Fabio Estevam
[not found] ` <Groupsio.1.AzJM.1641895683786982194.qQoa@lists.yoctoproject.org>
2022-01-12 12:26 ` Fabio Estevam
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