netdev - Re: [PATCH net-next 4/6] ionic: add queue lock around open and stop

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Message-ID: <20210827173906.1aa14274@kicinski-fedora-pc1c0hjn.dhcp.thefacebook.com>
Date:   Fri, 27 Aug 2021 17:39:06 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Shannon Nelson <snelson@...sando.io>
Cc:     davem@...emloft.net, netdev@...r.kernel.org, drivers@...sando.io,
        jtoppins@...hat.com
Subject: Re: [PATCH net-next 4/6] ionic: add queue lock around open and stop

On Fri, 27 Aug 2021 11:55:10 -0700 Shannon Nelson wrote:
> Add the queue configuration lock to ionic_open() and
> ionic_stop() so that they don't collide with other in parallel
> queue configuration actions such as MTU changes as can be
> demonstrated with a tight loop of ifup/change-mtu/ifdown.

Say more? how are up/down/change mtu not under rtnl_lock?