linux-kernel - Re: [PATCH] vhost: copy_from_user -> __copy_from

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Message-ID: <20110307063014.GA11330@redhat.com>
Date:	Mon, 7 Mar 2011 08:30:15 +0200
From:	"Michael S. Tsirkin" <mst@...hat.com>
To:	David Miller <davem@...emloft.net>
Cc:	kvm@...r.kernel.org, virtualization@...ts.linux-foundation.org,
	netdev@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] vhost: copy_from_user -> __copy_from_user

On Sun, Mar 06, 2011 at 06:03:39PM -0800, David Miller wrote:
> From: "Michael S. Tsirkin" <mst@...hat.com>
> Date: Sun, 6 Mar 2011 13:33:49 +0200
> 
> > copy_from_user is pretty high on perf top profile,
> > replacing it with __copy_from_user helps.
> > It's also safe because we do access_ok checks during setup.
> > 
> > Signed-off-by: Michael S. Tsirkin <mst@...hat.com>
> 
> Is Rusty going to take this or should I?

Sorry about not making this clear.  I'll give it a day or two for review
then put it on the vhost tree myself.
Thanks!
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