linux-kernel - Re: [PATCH RFC] virtio-net: remove useless disable on freeze

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Message-ID: <20120531090437.GA15447@redhat.com>
Date:	Thu, 31 May 2012 12:04:38 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Stephen Rothwell <sfr@...b.auug.org.au>
Cc:	Rusty Russell <rusty@...tcorp.com.au>, netdev@...r.kernel.org,
	virtualization@...ts.linux-foundation.org,
	linux-kernel@...r.kernel.org, Amit Shah <amit.shah@...hat.com>,
	kvm@...r.kernel.org
Subject: Re: [PATCH RFC] virtio-net: remove useless disable on freeze

On Thu, May 31, 2012 at 11:47:17AM +0300, Michael S. Tsirkin wrote:
> On Thu, May 31, 2012 at 06:35:08PM +1000, Stephen Rothwell wrote:
> > Hi all,
> > 
> > On Wed, 30 May 2012 19:41:47 +0930 Rusty Russell <rusty@...tcorp.com.au> wrote:
> > >
> > > On Mon, 28 May 2012 15:53:25 +0300, "Michael S. Tsirkin" <mst@...hat.com> wrote:
> > > > On Wed, Apr 04, 2012 at 12:19:54PM +0300, Michael S. Tsirkin wrote:
> > > > > disable_cb is just an optimization: it
> > > > > can not guarantee that there are no callbacks.
> > > > > 
> > > > > I didn't yet figure out whether a callback
> > > > > in freeze will trigger a bug, but disable_cb
> > > > > won't address it in any case. So let's remove
> > > > > the useless calls as a first step.
> > > > > 
> > > > > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> > > > 
> > > > Looks like this isn't in the 3.5 pull request -
> > > > just lost in the shuffle?
> > > > disable_cb is advisory so can't be relied upon.
> > > 
> > > I always (try to?) reply as I accept patches.
> > > 
> > > This one did slip by, but it's harmless so no need to push AFAICT.
> > > 
> > > Applied.
> > 
> > This patch exists in two trees in linux-next already ... Davem's net tree
> > (so presumably he will send it to Linus shortly) and Michael's vhost tree
> > (is that tree needed any more?).
> 
> Yes and I dropped the patch from there, just did not push yet.

pushed.
There's usually not too much in my tree but it helps me a lot
that it's in linux-next.

> >  Presumably it is now also in the rr
> > tree?
> > 
> > -- 
> > Cheers,
> > Stephen Rothwell                    sfr@...b.auug.org.au
> 
> 
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