linux-kernel - Re: [PATCH RFC 1/3] virtio_ring: add capacity check API

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Message-ID: <20110602133056.GI7141@redhat.com>
Date:	Thu, 2 Jun 2011 16:30:56 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	linux-kernel@...r.kernel.org, Carsten Otte <cotte@...ibm.com>,
	Christian Borntraeger <borntraeger@...ibm.com>,
	linux390@...ibm.com, Martin Schwidefsky <schwidefsky@...ibm.com>,
	Heiko Carstens <heiko.carstens@...ibm.com>,
	Shirley Ma <xma@...ibm.com>, lguest@...ts.ozlabs.org,
	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	linux-s390@...r.kernel.org, kvm@...r.kernel.org,
	Krishna Kumar <krkumar2@...ibm.com>,
	Tom Lendacky <tahm@...ux.vnet.ibm.com>, steved@...ibm.com,
	habanero@...ux.vnet.ibm.com
Subject: Re: [PATCH RFC 1/3] virtio_ring: add capacity check API

On Thu, Jun 02, 2011 at 11:41:50AM +0930, Rusty Russell wrote:
> On Wed, 1 Jun 2011 12:49:46 +0300, "Michael S. Tsirkin" <mst@...hat.com> wrote:
> > Add API to check ring capacity. Because of the option
> > to use indirect buffers, this returns the worst
> > case, not the normal case capacity.
> 
> Can we drop the silly "add_buf() returns capacity" hack then?
> 
> Thanks,
> Rusty.

Sure.
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