From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx164.postini.com [74.125.245.164]) by kanga.kvack.org (Postfix) with SMTP id CEFF36B00CC for ; Sun, 26 May 2013 11:00:07 -0400 (EDT) Received: by mail-oa0-f54.google.com with SMTP id o17so8002514oag.13 for ; Sun, 26 May 2013 08:00:07 -0700 (PDT) MIME-Version: 1.0 In-Reply-To: <51A21C63.4010606@gmail.com> References: <1369298568-20094-1-git-send-email-liwanp@linux.vnet.ibm.com> <51A16268.4000401@gmail.com> <51A21C63.4010606@gmail.com> From: KOSAKI Motohiro Date: Sun, 26 May 2013 10:59:46 -0400 Message-ID: Subject: Re: [PATCH v2 1/4] mm/memory-hotplug: fix lowmem count overflow when offline pages Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: Liu Jiang Cc: Wanpeng Li , Andrew Morton , Michal Hocko , KAMEZAWA Hiroyuki , David Rientjes , Jiang Liu , Tang Chen , "linux-mm@kvack.org" , LKML , Benjamin Herrenschmidt > Hi KOSAKI, > Could you please help to give more information on the background > about why 32bit platforms with highmem can't support memory hot-removal? It doesn't impossible. Just nobody did. I was playing these code as a maintainer a while and I saw all of patches doesn't handle highmem correctly. But I didn't refuse because I know it's not a regression. > We are trying to enable memory hot-removal on some 32bit platforms with > highmem, really appreciate your help here! But, if you guys have a strong motivation, it's a very good news. I have no objection not to mark it broken and accept your contributions. -- 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