From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx190.postini.com [74.125.245.190]) by kanga.kvack.org (Postfix) with SMTP id 70FB06B0032 for ; Mon, 15 Jul 2013 21:49:02 -0400 (EDT) Received: from m4.gw.fujitsu.co.jp (unknown [10.0.50.74]) by fgwmail6.fujitsu.co.jp (Postfix) with ESMTP id 81A613EE0AE for ; Tue, 16 Jul 2013 10:49:00 +0900 (JST) Received: from smail (m4 [127.0.0.1]) by outgoing.m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 738B745DE4F for ; Tue, 16 Jul 2013 10:49:00 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (s4.gw.fujitsu.co.jp [10.0.50.94]) by m4.gw.fujitsu.co.jp (Postfix) with ESMTP id 5E24645DE4E for ; Tue, 16 Jul 2013 10:49:00 +0900 (JST) Received: from s4.gw.fujitsu.co.jp (localhost.localdomain [127.0.0.1]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 4CEF21DB803B for ; Tue, 16 Jul 2013 10:49:00 +0900 (JST) Received: from g01jpfmpwkw01.exch.g01.fujitsu.local (g01jpfmpwkw01.exch.g01.fujitsu.local [10.0.193.38]) by s4.gw.fujitsu.co.jp (Postfix) with ESMTP id 0267C1DB802F for ; Tue, 16 Jul 2013 10:49:00 +0900 (JST) Message-ID: <51E4A660.7030804@jp.fujitsu.com> Date: Tue, 16 Jul 2013 10:48:16 +0900 From: Yasuaki Ishimatsu MIME-Version: 1.0 Subject: Re: migrate vmalloc area for memory hot-remove References: <20130715163701.GA16950@dhcp-192-168-178-175.profitbricks.localdomain> In-Reply-To: <20130715163701.GA16950@dhcp-192-168-178-175.profitbricks.localdomain> Content-Type: text/plain; charset="ISO-8859-1"; format=flowed Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Vasilis Liaskovitis Cc: linux-mm@kvack.org, tangchen@cn.fujitsu.com Hi Vasilis, (2013/07/16 1:37), Vasilis Liaskovitis wrote: > Hi Yasuaki, > > in your memory hotplug slides at LinuxCon Japan 2013, you mention "migrate > vmalloc area" as one of the TODO items (slide 30 / 31): > > http://events.linuxfoundation.org/sites/events/files/lcjp13_ishimatsu.pdf > > can you further explain this problem? Isn't this case handled already from the > current page migration code? > > Do you have a specific testcase that can trigger this issue? This item aims to increase removable memory. When we use memory hot remove, we need to use ZONE_MOVABLE. But the use of the zone is limited. The zone can treat only anonymous page and page cache. So I want to enhance the zone to treat vmalloc area. But currently there is no patch. Thanks, Yasuaki Ishimatsu > > thanks, > > - Vasilis > -- 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