From mboxrd@z Thu Jan 1 00:00:00 1970 From: Steve Capper Subject: Re: [PATH V2 4/6] arm: mm: Enable RCU fast_gup Date: Wed, 27 Aug 2014 14:01:08 +0100 Message-ID: <20140827130107.GA8210@linaro.org> 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> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Content-Disposition: inline In-Reply-To: <20140827115137.GK6968@arm.com> Sender: owner-linux-mm@kvack.org To: Catalin Marinas Cc: "linux-arm-kernel@lists.infradead.org" , "linux@arm.linux.org.uk" , "linux-arch@vger.kernel.org" , "linux-mm@kvack.org" , Will Deacon , "gary.robertson@linaro.org" , "christoffer.dall@linaro.org" , "peterz@infradead.org" , "anders.roxell@linaro.org" , "akpm@linux-foundation.org" , "dann.frazier@canonical.com" , Mark Rutland , "mgorman@suse.de" List-Id: linux-arch.vger.kernel.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 > > Reviewed-by: Catalin Marinas Thanks. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f178.google.com ([209.85.212.178]:52507 "EHLO mail-wi0-f178.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933257AbaH0NBT (ORCPT ); Wed, 27 Aug 2014 09:01:19 -0400 Received: by mail-wi0-f178.google.com with SMTP id hi2so384995wib.5 for ; Wed, 27 Aug 2014 06:01:15 -0700 (PDT) Date: Wed, 27 Aug 2014 14:01:08 +0100 From: Steve Capper Subject: Re: [PATH V2 4/6] arm: mm: Enable RCU fast_gup Message-ID: <20140827130107.GA8210@linaro.org> 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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140827115137.GK6968@arm.com> Sender: linux-arch-owner@vger.kernel.org List-ID: To: Catalin Marinas Cc: "linux-arm-kernel@lists.infradead.org" , "linux@arm.linux.org.uk" , "linux-arch@vger.kernel.org" , "linux-mm@kvack.org" , Will Deacon , "gary.robertson@linaro.org" , "christoffer.dall@linaro.org" , "peterz@infradead.org" , "anders.roxell@linaro.org" , "akpm@linux-foundation.org" , "dann.frazier@canonical.com" , Mark Rutland , "mgorman@suse.de" Message-ID: <20140827130108.qXg1vPD5C5UFrZ1vqL8sCFFXT8RDmIgArdHwvuXliPo@z> 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 > > Reviewed-by: Catalin Marinas Thanks.