Subject: Re: [PATCH net V2 1/2] virtio-net: don't respond to cpu hotplug notifier if we're not ready

From: Rusty Russell <[email-masked]>
Date: Thu, 17 Oct 2013 09:57:41 +1030

Jason Wang <[email-masked]> writes:
> We're trying to re-configure the affinity unconditionally in cpu hotplug
> callback. This may lead the issue during resuming from s3/s4 since
>
> - virt queues haven't been allocated at that time.
> - it's unnecessary since thaw method will re-configure the affinity.
>
> Fix this issue by checking the config_enable and do nothing is we're not ready.
>
> The bug were introduced by commit 8de4b2f3ae90c8fc0f17eeaab87d5a951b66ee17
> (virtio-net: reset virtqueue affinity when doing cpu hotplug).
>
> Cc: Rusty Russell <[email-masked]>
> Cc: Michael S. Tsirkin <[email-masked]>
> Cc: Wanlong Gao <[email-masked]>
> Acked-by: Michael S. Tsirkin <[email-masked]>
> Reviewed-by: Wanlong Gao <[email-masked]>
> Signed-off-by: Jason Wang <[email-masked]>
> ---
> The patch is need for 3.8 and above.

Please put 'CC: [email-masked] # 3.8+' in the commit.

(The specification of the stable line is poor, but that seems to be one
common method).

Cheers,
Rusty.