From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946044Ab2EKTJX (ORCPT ); Fri, 11 May 2012 15:09:23 -0400 Received: from smtp107.prem.mail.ac4.yahoo.com ([76.13.13.46]:39227 "HELO smtp107.prem.mail.ac4.yahoo.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S932215Ab2EKTJV (ORCPT ); Fri, 11 May 2012 15:09:21 -0400 X-Yahoo-Newman-Property: ymail-3 X-YMail-OSG: fjuUAkUVM1l7YcaRwQ.OhVdOFSkaZYS0SJWla9aoppVkpPb 5ckTFMqWJ6V1thZSPB.P6HA2rRfyqm8iQvomfz.1WsqRL8SqPerYz2PahWj2 vzO8UGeC0M0QzgRkTqcELpSrCc3FXBPHaQnNqumiHRn4Qm79_qYTecVxJeo4 WLBV6E8odAY_s_6yGyriJjNwpdRSMkugoDan252YzYa43Ut5myWL9jU0LkEH BUtR9NkS3nkH11h0hsI2SoYvKoj4LFtWuCGb18KKKc1lknlDz3f_hE10g.EU whA58Sp7fdhJbZ3KZ3auauvECKSt5222kiOZIS0m8BDA.9ZBB5hUdsfW_CiT M_9eg3oq.DRBjR_zGxByAkoI2P2OEsEEKc9E5CFXN8MInQo8tajyVlA7VJof 2 X-Yahoo-SMTP: _Dag8S.swBC1p4FJKLCXbs8NQzyse1SYSgnAbY0- Date: Fri, 11 May 2012 14:09:15 -0500 (CDT) From: Christoph Lameter X-X-Sender: cl@router.home To: Glauber Costa cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, kamezawa.hiroyu@jp.fujitsu.com, Tejun Heo , Li Zefan , Greg Thelen , Suleiman Souhlal , Michal Hocko , Johannes Weiner , devel@openvz.org, Pekka Enberg Subject: Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree In-Reply-To: <4FAD6169.8090409@parallels.com> Message-ID: References: <1336758272-24284-1-git-send-email-glommer@parallels.com> <1336758272-24284-5-git-send-email-glommer@parallels.com> <4FAD531D.6030007@parallels.com> <4FAD566C.3000804@parallels.com> <4FAD585A.4070007@parallels.com> <4FAD5DA2.70803@parallels.com> <4FAD6169.8090409@parallels.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 Fri, 11 May 2012, Glauber Costa wrote: > On 05/11/2012 03:56 PM, Christoph Lameter wrote: > > On Fri, 11 May 2012, Glauber Costa wrote: > > > > > So we don't mix pages from multiple memcgs in the same cache - we believe > > > that > > > would be too confusing. > > > > Well subsystem create caches and other things that are shared between > > multiple processes. How can you track that? > > Each process that belongs to a memcg triggers the creation of a new child kmem > cache. I see that. But there are other subsystems from slab allocators that do the same. There are also objects that may be used by multiple processes. F.e what about shm? > > > /proc/slabinfo reflects this information, by listing the memcg-specific > > > slabs. > > > > What about /sys/kernel/slab/*? > > From the PoV of the global system, what you'll see is something like: > dentry , dentry(2:memcg1), dentry(2:memcg2), etc. Hmmm.. Would be better to have a hierachy there. /proc/slabinfo is more legacy. From mboxrd@z Thu Jan 1 00:00:00 1970 From: Christoph Lameter Subject: Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree Date: Fri, 11 May 2012 14:09:15 -0500 (CDT) Message-ID: References: <1336758272-24284-1-git-send-email-glommer@parallels.com> <1336758272-24284-5-git-send-email-glommer@parallels.com> <4FAD531D.6030007@parallels.com> <4FAD566C.3000804@parallels.com> <4FAD585A.4070007@parallels.com> <4FAD5DA2.70803@parallels.com> <4FAD6169.8090409@parallels.com> Mime-Version: 1.0 Return-path: DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=yahoo.com; s=s1024; t=1336763359; bh=DJPzprHkxREodaS1nwhxWQnoTZRphutBEq/p1KK80xc=; h=X-Yahoo-Newman-Property:X-YMail-OSG:X-Yahoo-SMTP:Received:Received:Date:From:X-X-Sender:To:cc:Subject:In-Reply-To:Message-ID:References:User-Agent:MIME-Version:Content-Type; b=JwciYZKpFsjQVFsA6kF7WvnZN2TDXYGzttNs2Yhdxs+NxBLXygDMLMyKbayVL18Cx7Lbv3slXodrCJv4gERE1v/0aC3XoWzl4hs2tIh258A0CI1ch/KF9RmqHWNZqgRqX5UsjM4NKtkw3WM+hEhXGKLEATB0K4BpkGDDlhPam6U= In-Reply-To: <4FAD6169.8090409@parallels.com> Sender: owner-linux-mm@kvack.org List-ID: Content-Type: TEXT/PLAIN; charset="us-ascii" Content-Transfer-Encoding: 7bit To: Glauber Costa Cc: linux-kernel@vger.kernel.org, cgroups@vger.kernel.org, linux-mm@kvack.org, kamezawa.hiroyu@jp.fujitsu.com, Tejun Heo , Li Zefan , Greg Thelen , Suleiman Souhlal , Michal Hocko , Johannes Weiner , devel@openvz.org, Pekka Enberg On Fri, 11 May 2012, Glauber Costa wrote: > On 05/11/2012 03:56 PM, Christoph Lameter wrote: > > On Fri, 11 May 2012, Glauber Costa wrote: > > > > > So we don't mix pages from multiple memcgs in the same cache - we believe > > > that > > > would be too confusing. > > > > Well subsystem create caches and other things that are shared between > > multiple processes. How can you track that? > > Each process that belongs to a memcg triggers the creation of a new child kmem > cache. I see that. But there are other subsystems from slab allocators that do the same. There are also objects that may be used by multiple processes. F.e what about shm? > > > /proc/slabinfo reflects this information, by listing the memcg-specific > > > slabs. > > > > What about /sys/kernel/slab/*? > > From the PoV of the global system, what you'll see is something like: > dentry , dentry(2:memcg1), dentry(2:memcg2), etc. Hmmm.. Would be better to have a hierachy there. /proc/slabinfo is more legacy. -- 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/ . Fight unfair telecom internet charges in Canada: sign http://stopthemeter.ca/ Don't email: email@kvack.org