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

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Message-Id: <20110306.180339.193718218.davem@davemloft.net>
Date:	Sun, 06 Mar 2011 18:03:39 -0800 (PST)
From:	David Miller <davem@...emloft.net>
To:	mst@...hat.com
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

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?
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