netdev - Re: [Xen-devel] [PATCH net-next] xen-netback: enable user to unload netback module

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Message-ID: <1367931629.26321.121.camel@zakaz.uk.xensource.com>
Date:	Tue, 7 May 2013 14:00:29 +0100
From:	Ian Campbell <Ian.Campbell@...rix.com>
To:	Wei Liu <wei.liu2@...rix.com>
CC:	"netdev@...r.kernel.org" <netdev@...r.kernel.org>,
	"xen-devel@...ts.xen.org" <xen-devel@...ts.xen.org>
Subject: Re: [Xen-devel] [PATCH net-next] xen-netback: enable user to unload
 netback module

On Mon, 2013-05-06 at 17:11 +0100, Wei Liu wrote:
> This patch enables user to unload netback module, which is useful when user
> wants to upgrade to a newer netback module without rebooting the host.
> 
> Netfront cannot handle netback removal event. As we cannot fix all possible
> frontends we add module get / put along with vif get / put to avoid
> mis-unloading of netback. To unload netback module, user needs to shutdown
> all VMs or migrate them to another host before hand.

... or just unplug their VIFs.

> Signed-off-by: Wei Liu <wei.liu2@...rix.com>

Acked-by: Ian Campbell <ian.campbell@...rix.com>
(when the tree reopens of course)

Ian.

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