From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932679AbaLBCBO (ORCPT ); Mon, 1 Dec 2014 21:01:14 -0500 Received: from mail-pd0-f171.google.com ([209.85.192.171]:61080 "EHLO mail-pd0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753077AbaLBCBL (ORCPT ); Mon, 1 Dec 2014 21:01:11 -0500 Message-ID: <547D1EE5.5060409@gmail.com> Date: Tue, 02 Dec 2014 10:07:33 +0800 From: Chen Gang User-Agent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10.10; rv:31.0) Gecko/20100101 Thunderbird/31.2.0 MIME-Version: 1.0 To: James Bottomley , "Carlos O'Donell" CC: Geert Uytterhoeven , Max Filippov , Minchan Kim , "akpm@linux-foundation.org" , "rth@twiddle.net" , "ink@jurassic.park.msu.ru" , "mattst88@gmail.com" , Ralf Baechle , "jejb@parisc-linux.org" , "deller@gmx.de" , "chris@zankel.net" , "linux-alpha@vger.kernel.org" , "linux-mips@linux-mips.org" , "linux-parisc@vger.kernel.org" , "linux-xtensa@linux-xtensa.org" , "linux-kernel@vger.kernel.org" , Arnd Bergmann Subject: Re: [PATCH] arch: uapi: asm: mman.h: Support MADV_FREE for madvise() References: <547CD304.20407@gmail.com> <1417485331.2585.26.camel@HansenPartnership.com> In-Reply-To: <1417485331.2585.26.camel@HansenPartnership.com> Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 12/2/14 09:55, James Bottomley wrote: > On Mon, 2014-12-01 at 17:01 -0500, Carlos O'Donell wrote: >> On Mon, Dec 1, 2014 at 4:35 PM, Geert Uytterhoeven wrote: >>> On Mon, Dec 1, 2014 at 9:52 PM, Max Filippov wrote: >>>> On Mon, Dec 1, 2014 at 11:43 PM, Chen Gang wrote: >>>>> At present, kernel supports madvise(MADV_FREE), so can benefit to all >>>>> related architectures (can grep MADV_WILLNEED or MADV_REMOVE in "arch/" >>>>> to know about all related architectures). >>>> >>>> A similar patch has been posted a while ago: >>>> >>>> http://www.spinics.net/lists/linux-mm/msg81538.html >>> >>> Would it be possible to use the same number everywhere? >> >> Yes please. It's ridiculous that we still need patches like this. >> >> I proposed unifying all this two years ago, but didn't follow up. >> >> From glibc's perspective it would be simpler if we started using the >> same number everywhere. >> >> http://www.spinics.net/lists/linux-api/msg02064.html > > Please co-ordinate with Andrew then because he's intent on merging this > patch: > > http://marc.info/?l=linux-mm-commits&m=141747572930808 > For me, we can let MADV_FREE to 8 based on the Andrew's mm tree. Since it is about uapi, we need try our best to let it perfect. Thanks. -- Chen Gang Open, share, and attitude like air, water, and life which God blessed