From mboxrd@z Thu Jan 1 00:00:00 1970 From: Chen Gang Subject: Re: [PATCH] arch: uapi: asm: mman.h: Support MADV_FREE for madvise() Date: Tue, 02 Dec 2014 09:56:18 +0800 Message-ID: <547D1C42.1010502@gmail.com> References: <547CD304.20407@gmail.com> Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 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 To: Carlos O'Donell , Geert Uytterhoeven Return-path: In-Reply-To: List-ID: List-Id: linux-parisc.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