linux-kernel - Re: [RFC PATCH] Subject: virtio: Add unused buffers detach from vring

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Date:	Tue, 15 Dec 2009 11:14:07 -0800
From:	Shirley Ma <mashirle@...ibm.com>
To:	"Michael S. Tsirkin" <mst@...hat.com>
Cc:	Rusty Russell <rusty@...tcorp.com.au>, Avi Kivity <avi@...hat.com>,
	netdev@...r.kernel.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Anthony Liguori <anthony@...emonkey.ws>
Subject: Re: [RFC PATCH] Subject: virtio: Add unused buffers detach from
 vring

Hello Michael,

On Tue, 2009-12-15 at 20:47 +0200, Michael S. Tsirkin wrote:
> > +                     detach_buf(vq, i);
> > +                     END_USE(vq);
> > +                     return vq->data[i];
> 
> In fact, this will return NULL always, won't it?

Nope, I changed the destroy to detach and return the buffers without
destroying them within the call. I thought it might be useful in some
other case. 

Maybe I should put destroy call back?

Thanks
Shirley

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