linux-kernel - Re: [PATCH] lib/group_cpus.c: avoid to acquire cpu hotplug lock in group_cpus

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Message-ID: <ZNmLgBW06NZWUMo1@fedora>
Date:   Mon, 14 Aug 2023 10:03:44 +0800
From:   Ming Lei <ming.lei@...hat.com>
To:     Guangwu Zhang <guazhang@...hat.com>
Cc:     Thomas Gleixner <tglx@...utronix.de>, linux-kernel@...r.kernel.org,
        Keith Busch <kbusch@...nel.org>,
        linux-nvme@...ts.infradead.org, linux-block@...ts.infradead.org,
        Yi Zhang <yi.zhang@...hat.com>, ming.lei@...hat.com
Subject: Re: [PATCH] lib/group_cpus.c: avoid to acquire cpu hotplug lock in
 group_cpus_evenly

Hello Thomas and Guys,

On Fri, Aug 11, 2023 at 06:59:25PM +0800, Guangwu Zhang wrote:
> Hi Ming,
> I don't find any IO block after apply the patch.
> 
> Tested-by: Guangwu Zhang <guazhang@...hat.com>

Can you take a look at this fix? And this one solves a couple
of nvme io hang report in case of cpu hotplug & reset involved.

Thanks,
Ming