From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx101.postini.com [74.125.245.101]) by kanga.kvack.org (Postfix) with SMTP id F3DC66B004D for ; Mon, 30 Jul 2012 06:30:40 -0400 (EDT) Message-ID: <50166379.4090305@cn.fujitsu.com> Date: Mon, 30 Jul 2012 18:35:37 +0800 From: Wen Congyang MIME-Version: 1.0 Subject: Re: [RFC PATCH v5 12/19] memory-hotplug: introduce new function arch_remove_memory() References: <50126B83.3050201@cn.fujitsu.com> <50126E2F.8010301@cn.fujitsu.com> <20120730102305.GB3631@osiris.boeblingen.de.ibm.com> In-Reply-To: <20120730102305.GB3631@osiris.boeblingen.de.ibm.com> Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=ISO-8859-1 Sender: owner-linux-mm@kvack.org List-ID: To: Heiko Carstens Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org, linux-s390@vger.kernel.org, linux-sh@vger.kernel.org, linux-ia64@vger.kernel.org, cmetcalf@tilera.com, rientjes@google.com, liuj97@gmail.com, len.brown@intel.com, benh@kernel.crashing.org, paulus@samba.org, cl@linux.com, minchan.kim@gmail.com, akpm@linux-foundation.org, kosaki.motohiro@jp.fujitsu.com, Yasuaki ISIMATU At 07/30/2012 06:23 PM, Heiko Carstens Wrote: > On Fri, Jul 27, 2012 at 06:32:15PM +0800, Wen Congyang wrote: >> We don't call __add_pages() directly in the function add_memory() >> because some other architecture related things need to be done >> before or after calling __add_pages(). So we should introduce >> a new function arch_remove_memory() to revert the things >> done in arch_add_memory(). >> >> Note: the function for s390 is not implemented(I don't know how to >> implement it for s390). > > There is no hardware or firmware interface which could trigger a > hot memory remove on s390. So there is nothing that needs to be > implemented. Thanks for providing this information. According to this, arch_remove_memory() for s390 can just return -EBUSY. Thanks Wen Congyang > > -- > To unsubscribe from this list: send the line "unsubscribe linux-acpi" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html > -- 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