From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-wi0-f180.google.com (mail-wi0-f180.google.com [209.85.212.180]) by kanga.kvack.org (Postfix) with ESMTP id C0B9A6B0039 for ; Wed, 27 Aug 2014 09:08:34 -0400 (EDT) Received: by mail-wi0-f180.google.com with SMTP id n3so405995wiv.13 for ; Wed, 27 Aug 2014 06:08:34 -0700 (PDT) Received: from mail-wi0-f179.google.com (mail-wi0-f179.google.com [209.85.212.179]) by mx.google.com with ESMTPS id l9si510972wjf.107.2014.08.27.06.08.28 for (version=TLSv1 cipher=ECDHE-RSA-RC4-SHA bits=128/128); Wed, 27 Aug 2014 06:08:29 -0700 (PDT) Received: by mail-wi0-f179.google.com with SMTP id f8so409760wiw.6 for ; Wed, 27 Aug 2014 06:08:28 -0700 (PDT) Date: Wed, 27 Aug 2014 14:08:25 +0100 From: Steve Capper Subject: Re: [PATH V2 5/6] arm64: mm: Enable HAVE_RCU_TABLE_FREE logic Message-ID: <20140827130824.GB8210@linaro.org> References: <1408635812-31584-1-git-send-email-steve.capper@linaro.org> <1408635812-31584-6-git-send-email-steve.capper@linaro.org> <20140827104840.GH6968@arm.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20140827104840.GH6968@arm.com> Sender: owner-linux-mm@kvack.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" On Wed, Aug 27, 2014 at 11:48:41AM +0100, Catalin Marinas wrote: > On Thu, Aug 21, 2014 at 04:43:31PM +0100, Steve Capper wrote: > > In order to implement fast_get_user_pages we need to ensure that the > > page table walker is protected from page table pages being freed from > > under it. > > > > This patch enables HAVE_RCU_TABLE_FREE, any page table pages belonging > > to address spaces with multiple users will be call_rcu_sched freed. > > Meaning that disabling interrupts will block the free and protect the > > fast gup page walker. > > > > Signed-off-by: Steve Capper > > I'm happy to take this patch independently of this series. But if the > whole series goes in via some other tree (mm): > > Acked-by: Catalin Marinas Thanks. If patch #1 looks okay to the mm folks, I'm hoping this patch can be merged via the same tree. -- 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