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

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Message-ID: <87sjrthti1.fsf@rustcorp.com.au>
Date:	Thu, 02 Jun 2011 11:41:50 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Cc:	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,
	linux-kernel@...r.kernel.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 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.
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