linux-kernel - Re: [RFC] virtio: use mandatory barriers for remote processor vdevs

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Message-ID: <CAK=Wgbb7kJu7WgJvCGb==7Oh_xCBrj6m2s1OH-WofXe7VgLBcA@mail.gmail.com>
Date:	Thu, 1 Dec 2011 09:15:11 +0200
From:	Ohad Ben-Cohen <ohad@...ery.com>
To:	Rusty Russell <rusty@...tcorp.com.au>
Cc:	"Michael S. Tsirkin" <mst@...hat.com>,
	virtualization@...ts.linux-foundation.org, kvm@...r.kernel.org,
	linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: Re: [RFC] virtio: use mandatory barriers for remote processor vdevs

On Thu, Dec 1, 2011 at 4:28 AM, Rusty Russell <rusty@...tcorp.com.au> wrote:
> Hmm, we got away with light barriers because we knew we were not
> *really* talking to a device.  But now with virtio-mmio, turns out we
> are :)
>
> I'm really tempted to revert d57ed95 for 3.2, and we can revisit this
> optimization later if it proves worthwhile.

+1
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