From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from m2.gw.fujitsu.co.jp ([10.0.50.72]) by fgwmail5.fujitsu.co.jp (Fujitsu Gateway) with ESMTP id m9M1tQR8015635 for (envelope-from kamezawa.hiroyu@jp.fujitsu.com); Wed, 22 Oct 2008 10:55:26 +0900 Received: from smail (m2 [127.0.0.1]) by outgoing.m2.gw.fujitsu.co.jp (Postfix) with ESMTP id 72F7B1B801E for ; Wed, 22 Oct 2008 10:55:26 +0900 (JST) Received: from s8.gw.fujitsu.co.jp (s8.gw.fujitsu.co.jp [10.0.50.98]) by m2.gw.fujitsu.co.jp (Postfix) with ESMTP id 4C6AE2DC01E for ; Wed, 22 Oct 2008 10:55:26 +0900 (JST) Received: from s8.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s8.gw.fujitsu.co.jp (Postfix) with ESMTP id 2DE501DB803C for ; Wed, 22 Oct 2008 10:55:26 +0900 (JST) Received: from ml10.s.css.fujitsu.com (ml10.s.css.fujitsu.com [10.249.87.100]) by s8.gw.fujitsu.co.jp (Postfix) with ESMTP id D11721DB8044 for ; Wed, 22 Oct 2008 10:55:25 +0900 (JST) Date: Wed, 22 Oct 2008 10:54:59 +0900 From: KAMEZAWA Hiroyuki Subject: [PATCH] memcg: uptodate menuconfig help text Message-Id: <20081022105459.3f7f2485.kamezawa.hiroyu@jp.fujitsu.com> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org Return-Path: To: "linux-kernel@vger.kernel.org" Cc: "linux-mm@kvack.org" , "balbir@linux.vnet.ibm.com" , "xemul@openvz.org" , "akpm@linux-foundation.org" List-ID: Now, page_cgroup is allocated at boot and memmap doesn't includes pointer for page_cgroup. Fixes menu help text for memcg-allocate-page-cgroup-at-boot.patch. Reviewed-by: Balbir Singh Signed-off-by: KAMEZAWA hiroyuki init/Kconfig | 16 ++++++++++------ 1 file changed, 10 insertions(+), 6 deletions(-) Index: linux-2.6/init/Kconfig =================================================================== --- linux-2.6.orig/init/Kconfig +++ linux-2.6/init/Kconfig @@ -401,16 +401,20 @@ config CGROUP_MEM_RES_CTLR depends on CGROUPS && RESOURCE_COUNTERS select MM_OWNER help - Provides a memory resource controller that manages both page cache and - RSS memory. + Provides a memory resource controller that manages both anonymous + memory and page cache. (See Documentation/controllers/memory.txt) Note that setting this option increases fixed memory overhead - associated with each page of memory in the system by 4/8 bytes - and also increases cache misses because struct page on many 64bit - systems will not fit into a single cache line anymore. + associated with each page of memory in the system. By this, + 20(40)bytes/PAGE_SIZE on 32(64)bit system will be occupied by memory + usage tracking struct at boot. Total amount of this is printed out + at boot. Only enable when you're ok with these trade offs and really - sure you need the memory resource controller. + sure you need the memory resource controller. Even when you enable + this, you can set "cgroup_disable=memory" at your boot option to + disable memory resource controller and you can avoid overheads. + (and lose benefits of memory resource contoller) This config option also selects MM_OWNER config option, which could in turn add some fork/exit overhead. -- 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