From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1946015Ab2EKTAv (ORCPT ); Fri, 11 May 2012 15:00:51 -0400 Received: from mx2.parallels.com ([64.131.90.16]:55190 "EHLO mx2.parallels.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752764Ab2EKTAt (ORCPT ); Fri, 11 May 2012 15:00:49 -0400 Message-ID: <4FAD6169.8090409@parallels.com> Date: Fri, 11 May 2012 15:58:49 -0300 From: Glauber Costa User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:10.0.1) Gecko/20120216 Thunderbird/10.0.1 MIME-Version: 1.0 To: Christoph Lameter CC: , , , , Tejun Heo , Li Zefan , Greg Thelen , Suleiman Souhlal , Michal Hocko , Johannes Weiner , , Pekka Enberg Subject: Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree 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> In-Reply-To: Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit X-Originating-IP: [187.105.248.83] Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 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. >> /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. No attempt is made to provide any view of those caches in a logically grouped way - the global system can view them independently. From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx111.postini.com [74.125.245.111]) by kanga.kvack.org (Postfix) with SMTP id 1C7AF8D0020 for ; Fri, 11 May 2012 15:00:52 -0400 (EDT) Message-ID: <4FAD6169.8090409@parallels.com> Date: Fri, 11 May 2012 15:58:49 -0300 From: Glauber Costa MIME-Version: 1.0 Subject: Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree 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> In-Reply-To: Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Christoph Lameter 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 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. >> /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. No attempt is made to provide any view of those caches in a logically grouped way - the global system can view them independently. -- 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 From mboxrd@z Thu Jan 1 00:00:00 1970 From: Glauber Costa Subject: Re: [PATCH v2 04/29] slub: always get the cache from its page in kfree Date: Fri, 11 May 2012 15:58:49 -0300 Message-ID: <4FAD6169.8090409@parallels.com> 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> Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: Sender: cgroups-owner-u79uwXL29TY76Z2rM5mHXA@public.gmane.org List-ID: Content-Type: text/plain; charset="us-ascii"; format="flowed" To: Christoph Lameter Cc: linux-kernel-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, cgroups-u79uwXL29TY76Z2rM5mHXA@public.gmane.org, linux-mm-Bw31MaZKKs3YtjvyW6yDsg@public.gmane.org, kamezawa.hiroyu-+CUm20s59erQFUHtdCDX3A@public.gmane.org, Tejun Heo , Li Zefan , Greg Thelen , Suleiman Souhlal , Michal Hocko , Johannes Weiner , devel-GEFAQzZX7r8dnm+yROfE0A@public.gmane.org, Pekka Enberg 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. >> /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. No attempt is made to provide any view of those caches in a logically grouped way - the global system can view them independently.