From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx113.postini.com [74.125.245.113]) by kanga.kvack.org (Postfix) with SMTP id B8AB06B0072 for ; Thu, 29 Nov 2012 17:46:04 -0500 (EST) Message-ID: <50B7E594.8090106@zytor.com> Date: Thu, 29 Nov 2012 14:45:40 -0800 From: "H. Peter Anvin" MIME-Version: 1.0 Subject: Re: [PATCH v2 0/5] Add movablecore_map boot option References: <1353667445-7593-1-git-send-email-tangchen@cn.fujitsu.com> <50B5CFAE.80103@huawei.com> <3908561D78D1C84285E8C5FCA982C28F1C95EDCE@ORSMSX108.amr.corp.intel.com> <50B68467.5020008@zytor.com> <20121129110045.GX8218@suse.de> <50B7882D.5060100@zytor.com> <3908561D78D1C84285E8C5FCA982C28F1C95FC11@ORSMSX108.amr.corp.intel.com> In-Reply-To: <3908561D78D1C84285E8C5FCA982C28F1C95FC11@ORSMSX108.amr.corp.intel.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: "Luck, Tony" Cc: Mel Gorman , Jiang Liu , Tang Chen , "akpm@linux-foundation.org" , "rob@landley.net" , "isimatu.yasuaki@jp.fujitsu.com" , "laijs@cn.fujitsu.com" , "wency@cn.fujitsu.com" , "linfeng@cn.fujitsu.com" , "yinghai@kernel.org" , "kosaki.motohiro@jp.fujitsu.com" , "minchan.kim@gmail.com" , "rientjes@google.com" , "rusty@rustcorp.com.au" , "linux-kernel@vger.kernel.org" , "linux-mm@kvack.org" , "linux-doc@vger.kernel.org" , Len Brown , "Wang, Frank" On 11/29/2012 02:41 PM, Luck, Tony wrote: >> The other bit is that if you really really want high reliability, memory >> mirroring is the way to go; it is the only way you will be able to >> hotremove memory without having to have a pre-event to migrate the >> memory away from the affected node before the memory is offlined. > > Some platforms don't support cross-node mirrors ... but we still want to > be able to remove a node. > Yes, well, those platforms don't support that degree of "really really high reliability", since the unannounced failure of the node controller will bring down the system. -hpa -- 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