linux-kernel - Re: [PATCH] arch: uapi: asm: mman.h: Support MADV

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Message-ID: <1417485331.2585.26.camel@HansenPartnership.com>
Date:	Mon, 01 Dec 2014 17:55:31 -0800
From:	James Bottomley <James.Bottomley@...senPartnership.com>
To:	Carlos O'Donell <carlos@...temhalted.org>
Cc:	Geert Uytterhoeven <geert@...ux-m68k.org>,
	Max Filippov <jcmvbkbc@...il.com>,
	Chen Gang <gang.chen.5i5j@...il.com>,
	Minchan Kim <minchan@...nel.org>,
	"akpm@...ux-foundation.org" <akpm@...ux-foundation.org>,
	"rth@...ddle.net" <rth@...ddle.net>,
	"ink@...assic.park.msu.ru" <ink@...assic.park.msu.ru>,
	"mattst88@...il.com" <mattst88@...il.com>,
	Ralf Baechle <ralf@...ux-mips.org>,
	"jejb@...isc-linux.org" <jejb@...isc-linux.org>,
	"deller@....de" <deller@....de>,
	"chris@...kel.net" <chris@...kel.net>,
	"linux-alpha@...r.kernel.org" <linux-alpha@...r.kernel.org>,
	"linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
	"linux-parisc@...r.kernel.org" <linux-parisc@...r.kernel.org>,
	"linux-xtensa@...ux-xtensa.org" <linux-xtensa@...ux-xtensa.org>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
	Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] arch: uapi: asm: mman.h: Support MADV_FREE for madvise()

On Mon, 2014-12-01 at 17:01 -0500, Carlos O'Donell wrote:
> On Mon, Dec 1, 2014 at 4:35 PM, Geert Uytterhoeven <geert@...ux-m68k.org> wrote:
> > On Mon, Dec 1, 2014 at 9:52 PM, Max Filippov <jcmvbkbc@...il.com> wrote:
> >> On Mon, Dec 1, 2014 at 11:43 PM, Chen Gang <gang.chen.5i5j@...il.com> 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

James


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