From mboxrd@z Thu Jan 1 00:00:00 1970 Received: with ECARTIS (v1.0.0; list linux-mips); Tue, 02 Dec 2014 02:49:59 +0100 (CET) Received: from mail-pa0-f50.google.com ([209.85.220.50]:61428 "EHLO mail-pa0-f50.google.com" rhost-flags-OK-OK-OK-OK) by eddie.linux-mips.org with ESMTP id S27007800AbaLBBt5rqLO- (ORCPT ); Tue, 2 Dec 2014 02:49:57 +0100 Received: by mail-pa0-f50.google.com with SMTP id bj1so12274440pad.23 for ; Mon, 01 Dec 2014 17:49:51 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20120113; h=message-id:date:from:user-agent:mime-version:to:cc:subject :references:in-reply-to:content-type:content-transfer-encoding; bh=m634Xw/0kJTtTXRrbTFUf9TJfKrUrsKja81vlu3PWwQ=; b=YElSg9mEBnxfjxckYFyQ0iSa5b1XIXjE/3O/dZ+hcOsWXwfeuD1DE8WP6LAuJaZneW x5CDk0U23BTxOe+6z6gRlkn7z5B7GC8heG7MhgIwPMKXpiCGi6ZpQ5OFUhMDmOIuAIk1 eBWTbLCcEjIlWll4OEj0CtiNUDcooK6Eu5Ev8tzDv9aPqH0Y7y49MvkYcLf0QOCqR4yU oxnMTNPBl8ZEbPd9SoG1bfPHx9S0yKHMHkEZBJ6wmsjKtBxB2sVhaFR2zPn/Tdy0KWqo 5M9yPA0ccis87mXco64v5YoNpHAWFi3Mj0MptAEss44qdx3W60a0nM5Np7A3yKWwWJ7j G4Eg== X-Received: by 10.68.136.137 with SMTP id qa9mr1458030pbb.8.1417484991667; Mon, 01 Dec 2014 17:49:51 -0800 (PST) Received: from ShengShiZhuChengdeMacBook-Pro.local ([124.127.118.42]) by mx.google.com with ESMTPSA id fj8sm14573597pdb.69.2014.12.01.17.49.41 for (version=TLSv1.2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Mon, 01 Dec 2014 17:49:50 -0800 (PST) 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 Return-Path: X-Envelope-To: <"|/home/ecartis/ecartis -s linux-mips"> (uid 0) X-Orcpt: rfc822;linux-mips@linux-mips.org Original-Recipient: rfc822;linux-mips@linux-mips.org X-archive-position: 44538 X-ecartis-version: Ecartis v1.0.0 Sender: linux-mips-bounce@linux-mips.org Errors-to: linux-mips-bounce@linux-mips.org X-original-sender: gang.chen.5i5j@gmail.com Precedence: bulk List-help: List-unsubscribe: List-software: Ecartis version 1.0.0 List-Id: linux-mips X-List-ID: linux-mips List-subscribe: List-owner: List-post: List-archive: X-list: linux-mips 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