From mboxrd@z Thu Jan  1 00:00:00 1970
From: steve.capper@linaro.org (Steve Capper)
Date: Wed, 27 Aug 2014 14:01:08 +0100
Subject: [PATH V2 4/6] arm: mm: Enable RCU fast_gup
In-Reply-To: <20140827115137.GK6968@arm.com>
References: <1408635812-31584-1-git-send-email-steve.capper@linaro.org>
 <1408635812-31584-5-git-send-email-steve.capper@linaro.org>
 <20140827115137.GK6968@arm.com>
Message-ID: <20140827130107.GA8210@linaro.org>
To: linux-arm-kernel@lists.infradead.org
List-Id: linux-arm-kernel.lists.infradead.org

On Wed, Aug 27, 2014 at 12:51:37PM +0100, Catalin Marinas wrote:
> On Thu, Aug 21, 2014 at 04:43:30PM +0100, Steve Capper wrote:
> > Activate the RCU fast_gup for ARM. We also need to force THP splits to
> > broadcast an IPI s.t. we block in the fast_gup page walker. As THP
> > splits are comparatively rare, this should not lead to a noticeable
> > performance degradation.
> > 
> > Some pre-requisite functions pud_write and pud_page are also added.
> > 
> > Signed-off-by: Steve Capper <steve.capper@linaro.org>
> 
> Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>

Thanks.