From patchwork Fri Oct 26 10:31:03 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wen Congyang X-Patchwork-Id: 1650971 Return-Path: X-Original-To: patchwork-linux-acpi@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 2F09340232 for ; Fri, 26 Oct 2012 10:48:34 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758336Ab2JZKs2 (ORCPT ); Fri, 26 Oct 2012 06:48:28 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:21852 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1758251Ab2JZKsK (ORCPT ); Fri, 26 Oct 2012 06:48:10 -0400 X-IronPort-AV: E=Sophos;i="4.80,654,1344182400"; d="scan'208";a="6078655" Received: from unknown (HELO tang.cn.fujitsu.com) ([10.167.250.3]) by song.cn.fujitsu.com with ESMTP; 26 Oct 2012 18:46:34 +0800 Received: from fnstmail02.fnst.cn.fujitsu.com (tang.cn.fujitsu.com [127.0.0.1]) by tang.cn.fujitsu.com (8.14.3/8.13.1) with ESMTP id q9QAPOSf023644; Fri, 26 Oct 2012 18:25:29 +0800 Received: from ghost.fnst.cn.fujitsu.com ([10.167.225.226]) by fnstmail02.fnst.cn.fujitsu.com (Lotus Domino Release 8.5.3) with ESMTP id 2012102618244975-782242 ; Fri, 26 Oct 2012 18:24:49 +0800 From: wency@cn.fujitsu.com To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linux-acpi@vger.kernel.org Cc: liuj97@gmail.com, len.brown@intel.com, akpm@linux-foundation.org, kosaki.motohiro@jp.fujitsu.com, isimatu.yasuaki@jp.fujitsu.com, rjw@sisk.pl, laijs@cn.fujitsu.com, David Rientjes , Christoph Lameter , Minchan Kim , Wen Congyang Subject: [PATCH v3 3/3] acpi, memory-hotplug : add memory offline code to acpi_memory_device_remove() Date: Fri, 26 Oct 2012 18:31:03 +0800 Message-Id: <1351247463-5653-4-git-send-email-wency@cn.fujitsu.com> X-Mailer: git-send-email 1.8.0 In-Reply-To: <1351247463-5653-1-git-send-email-wency@cn.fujitsu.com> References: <1351247463-5653-1-git-send-email-wency@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/10/26 18:24:49, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/10/26 18:24:54, Serialize complete at 2012/10/26 18:24:54 Sender: linux-acpi-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-acpi@vger.kernel.org From: Yasuaki Ishimatsu The memory device can be removed by 2 ways: 1. send eject request by SCI 2. echo 1 >/sys/bus/pci/devices/PNP0C80:XX/eject In the 1st case, acpi_memory_disable_device() will be called. In the 2nd case, acpi_memory_device_remove() will be called. acpi_memory_device_remove() will also be called when we unbind the memory device from the driver acpi_memhotplug or a driver initialization fails. acpi_memory_disable_device() has already implemented a code which offlines memory and releases acpi_memory_info struct. But acpi_memory_device_remove() has not implemented it yet. So the patch move offlining memory and releasing acpi_memory_info struct codes to a new function acpi_memory_remove_memory(). And it is used by both acpi_memory_device_remove() and acpi_memory_disable_device(). CC: David Rientjes CC: Jiang Liu CC: Len Brown CC: Christoph Lameter Cc: Minchan Kim CC: Andrew Morton CC: KOSAKI Motohiro Signed-off-by: Yasuaki Ishimatsu Signed-off-by: Wen Congyang --- drivers/acpi/acpi_memhotplug.c | 31 ++++++++++++++++++++++++------- 1 file changed, 24 insertions(+), 7 deletions(-) diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index 666dac6..92c973a 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -316,16 +316,11 @@ static int acpi_memory_powerdown_device(struct acpi_memory_device *mem_device) return 0; } -static int acpi_memory_disable_device(struct acpi_memory_device *mem_device) +static int acpi_memory_remove_memory(struct acpi_memory_device *mem_device) { int result; struct acpi_memory_info *info, *n; - - /* - * Ask the VM to offline this memory range. - * Note: Assume that this function returns zero on success - */ mutex_lock(&mem_device->list_lock); list_for_each_entry_safe(info, n, &mem_device->res_list, list) { if (info->enabled) { @@ -333,10 +328,27 @@ static int acpi_memory_disable_device(struct acpi_memory_device *mem_device) if (result) return result; } + + list_del(&info->list); kfree(info); } mutex_unlock(&mem_device->list_lock); + return 0; +} + +static int acpi_memory_disable_device(struct acpi_memory_device *mem_device) +{ + int result; + + /* + * Ask the VM to offline this memory range. + * Note: Assume that this function returns zero on success + */ + result = acpi_memory_remove_memory(mem_device); + if (result) + return result; + /* Power-off and eject the device */ result = acpi_memory_powerdown_device(mem_device); if (result) { @@ -487,12 +499,17 @@ static int acpi_memory_device_add(struct acpi_device *device) static int acpi_memory_device_remove(struct acpi_device *device, int type) { struct acpi_memory_device *mem_device = NULL; - + int result; if (!device || !acpi_driver_data(device)) return -EINVAL; mem_device = acpi_driver_data(device); + + result = acpi_memory_remove_memory(mem_device); + if (result) + return result; + kfree(mem_device); return 0;