netdev - Re: [PATCH vhost 0/2] virtio_net: fix for stuck when change ring size with dev down

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Message-ID: <1660205553.7374692-1-xuanzhuo@linux.alibaba.com>
Date:   Thu, 11 Aug 2022 16:12:33 +0800
From:   Xuan Zhuo <xuanzhuo@...ux.alibaba.com>
To:     "Michael S. Tsirkin" <mst@...hat.com>
Cc:     virtualization@...ts.linux-foundation.org,
        Jason Wang <jasowang@...hat.com>,
        "David S. Miller" <davem@...emloft.net>,
        Eric Dumazet <edumazet@...gle.com>,
        Jakub Kicinski <kuba@...nel.org>,
        Paolo Abeni <pabeni@...hat.com>, netdev@...r.kernel.org
Subject: Re: [PATCH vhost 0/2] virtio_net: fix for stuck when change ring size with dev down

On Thu, 11 Aug 2022 04:11:22 -0400, "Michael S. Tsirkin" <mst@...hat.com> wrote:
> On Thu, Aug 11, 2022 at 04:02:56PM +0800, Xuan Zhuo wrote:
> > When dev is set to DOWN state, napi has been disabled, if we modify the
> > ring size at this time, we should not call napi_disable() again, which
> > will cause stuck.
> >
> > And all operations are under the protection of rtnl_lock, so there is no
> > need to consider concurrency issues.
> >
> > PS.
> > Hi Michael, I don't know which way is more convenient for you, so I split the
> > commit into two commits, so you can fixup to my previous commit:
> >
> >     virtio_net: support tx queue resize
> > 	virtio_net: support rx queue resize
> >
> > Xuan Zhuo (2):
> >   virtio_net: fix for stuck when change rx ring size with dev down
> >   virtio_net: fix for stuck when change tx ring size with dev down
> >
> >  drivers/net/virtio_net.c | 14 ++++++++++----
> >  1 file changed, 10 insertions(+), 4 deletions(-)
>
>
> Which patches does this fix?
> Maybe I should squash.

These two:
     virtio_net: support tx queue resize
     virtio_net: support rx queue resize

Thanks.


>
> > --
> > 2.31.0
>