From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754276AbaLBBty (ORCPT ); Mon, 1 Dec 2014 20:49:54 -0500 Received: from mail-pd0-f174.google.com ([209.85.192.174]:46310 "EHLO mail-pd0-f174.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753077AbaLBBtw (ORCPT ); Mon, 1 Dec 2014 20:49:52 -0500 Message-ID: <547D1C42.1010502@gmail.com> Date: Tue, 02 Dec 2014 09:56:18 +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: "Carlos O'Donell" , Geert Uytterhoeven CC: 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> In-Reply-To: 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 06:01, 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 >> OK, thanks. >> Would it be possible to use the same number everywhere? > For current patch, I guess, we can use '8' for it, since MADV_FREE in asm-generic is merged just a few days ago (which is not used by user mode), and parisc has to use '8'. And welcome the related member's ideas. > 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 > For me, we can divide it into 2 steps: - Let MADV_FREE has the same value (about current patch). - Let all shared MADV_* to "asm-generic" (about next patch, although I am not quite sure whether it is executable). Thanks. -- Chen Gang Open, share, and attitude like air, water, and life which God blessed