From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933250Ab2GEOrV (ORCPT ); Thu, 5 Jul 2012 10:47:21 -0400 Received: from smtp109.prem.mail.ac4.yahoo.com ([76.13.13.92]:47123 "HELO smtp109.prem.mail.ac4.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S932779Ab2GEOrT (ORCPT ); Thu, 5 Jul 2012 10:47:19 -0400 X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: zxzopNIVM1lZDC_LAHiQBY6PirexcY5D_JC0iQL2dGOBtMV 7TYI_b0oq4jxj4E5DH4gFVPFiaFdhjxtQJaMaulJQJ665.D2jYheAdHBfPot .LOtGFZ1KL5ccookJ0GnlYt2pqZ16b1HKsBdC7XCr8fLEDg.KGxKUSxy_Maj CfVIf7WxoWwXpOie7V50nk37yT0MDJQvOpVeRaJAZzkfgySBYqOL.I707kvf H_YriYDh0iZ1EMPePpqkIcqNQyw6JtwmWCyDjm0Ys2xK8guI0.AaoVpv840B 25CMuyfBzN.GNkuF8TDTWzdZ1gz0U8yyL_SS0cgQkMjOk.pgnLrQnpXunFLb UBb3kquo2CPcx1QC9GVO8U.z7AhHx8PWGfN7L78ihwmBdp04B2pLMIeDHo6D J X-Yahoo-SMTP: _Dag8S.swBC1p4FJKLCXbs8NQzyse1SYSgnAbY0- Date: Thu, 5 Jul 2012 09:47:14 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@router.home To: Jiang Liu cc: Pekka Enberg , Matt Mackall , Mel Gorman , Yinghai Lu , Tony Luck , KAMEZAWA Hiroyuki , KOSAKI Motohiro , David Rientjes , Minchan Kim , Keping Chen , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Jiang Liu Subject: Re: [RFC PATCH 2/4] mm: make consistent use of PG_slab flag In-Reply-To: <1341287837-7904-2-git-send-email-jiang.liu@huawei.com> Message-ID: References: <1341287837-7904-1-git-send-email-jiang.liu@huawei.com> <1341287837-7904-2-git-send-email-jiang.liu@huawei.com> User-Agent: Alpine 2.00 (DEB 1167 2008-08-23) MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Tue, 3 Jul 2012, Jiang Liu wrote: > PG_slabobject: mark whether a (compound) page hosts SLUB/SLOB objects. Any subsystem may allocate a compound page to store metadata. The compound pages used by SLOB and SLUB are not managed in any way but the calls to kfree and kmalloc are converted to calls to the page allocator. There is no "management" by the slab allocators for these cases and its inaccurate to say that these are SLUB/SLOB objects since the allocators never deal with these objects. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx101.postini.com [74.125.245.101]) by kanga.kvack.org (Postfix) with SMTP id 43B076B0071 for ; Thu, 5 Jul 2012 10:47:19 -0400 (EDT) Date: Thu, 5 Jul 2012 09:47:14 -0500 (CDT) From: Christoph Lameter Subject: Re: [RFC PATCH 2/4] mm: make consistent use of PG_slab flag In-Reply-To: <1341287837-7904-2-git-send-email-jiang.liu@huawei.com> Message-ID: References: <1341287837-7904-1-git-send-email-jiang.liu@huawei.com> <1341287837-7904-2-git-send-email-jiang.liu@huawei.com> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Jiang Liu Cc: Pekka Enberg , Matt Mackall , Mel Gorman , Yinghai Lu , Tony Luck , KAMEZAWA Hiroyuki , KOSAKI Motohiro , David Rientjes , Minchan Kim , Keping Chen , linux-mm@kvack.org, linux-kernel@vger.kernel.org, Jiang Liu On Tue, 3 Jul 2012, Jiang Liu wrote: > PG_slabobject: mark whether a (compound) page hosts SLUB/SLOB objects. Any subsystem may allocate a compound page to store metadata. The compound pages used by SLOB and SLUB are not managed in any way but the calls to kfree and kmalloc are converted to calls to the page allocator. There is no "management" by the slab allocators for these cases and its inaccurate to say that these are SLUB/SLOB objects since the allocators never deal with these objects. -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org