linux-kernel - Re: [Qemu-devel] [PATCH RFC] virtio: put last seen used index into ring itself

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Message-ID: <20100520100447.GC5717@redhat.com>
Date:	Thu, 20 May 2010 13:04:47 +0300
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	Avi Kivity <avi@...hat.com>, linux-kernel@...r.kernel.org,
	virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
	qemu-devel@...gnu.org
Subject: Re: [Qemu-devel] [PATCH RFC] virtio: put last seen used index into
	ring itself

On Thu, May 20, 2010 at 02:31:50PM +0930, Rusty Russell wrote:
> Can we do better?  The obvious idea is to try to get rid of last_used and
> used, and use the ring itself.  We would use an invalid entry to mark the
> head of the ring.
> 
> Any other thoughts?
> Rusty.

We also need a way to avoid interrupts at least while we are
processing the ring.

-- 
MST
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