linux-kernel - Re: [PATCH 1/2] virtio: support unlocked queue poll

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Message-ID: <87k3kzcdq1.fsf@rustcorp.com.au>
Date:	Wed, 10 Jul 2013 12:39:58 +0930
From:	Rusty Russell <rusty@...tcorp.com.au>
To:	"Michael S. Tsirkin" <mst@...hat.com>, linux-kernel@...r.kernel.org
Cc:	virtualization@...ts.linux-foundation.org, netdev@...r.kernel.org,
	Jason Wang <jasowang@...hat.com>
Subject: Re: [PATCH 1/2] virtio: support unlocked queue poll

"Michael S. Tsirkin" <mst@...hat.com> writes:
> This adds a way to check ring empty state after enable_cb outside any
> locks. Will be used by virtio_net.
>
> Note: there's room for more optimization: caller is likely to have a
> memory barrier already, which means we might be able to get rid of a
> barrier here.  Deferring this optimization until we do some
> benchmarking.
>
> Signed-off-by: Michael S. Tsirkin <mst@...hat.com>

Acked-by: Rusty Russell <rusty@...tcorp.com.au>

Thanks,
Rusty.
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