From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx199.postini.com [74.125.245.199]) by kanga.kvack.org (Postfix) with SMTP id 119306B004D for ; Fri, 20 Jul 2012 03:05:18 -0400 (EDT) Message-ID: <5009044B.7050203@cn.fujitsu.com> Date: Fri, 20 Jul 2012 15:10:03 +0800 From: Wen Congyang MIME-Version: 1.0 Subject: [RFC PATCH 2/8] memory-hotplug: offline memory only when it is onlined References: <5009038A.4090001@cn.fujitsu.com> In-Reply-To: <5009038A.4090001@cn.fujitsu.com> Content-Transfer-Encoding: 7bit Content-Type: text/plain; charset=UTF-8 Sender: owner-linux-mm@kvack.org List-ID: To: linux-mm@kvack.org, linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org, linux-acpi@vger.kernel.org Cc: 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 offline_memory() will fail if the memory is not onlined. So check whether the memory is onlined before calling offline_memory(). CC: David Rientjes CC: Jiang Liu CC: Len Brown CC: Benjamin Herrenschmidt CC: Paul Mackerras CC: Christoph Lameter Cc: Minchan Kim CC: Andrew Morton CC: KOSAKI Motohiro CC: Yasuaki Ishimatsu Signed-off-by: Wen Congyang --- drivers/acpi/acpi_memhotplug.c | 10 +++++++--- 1 files changed, 7 insertions(+), 3 deletions(-) diff --git a/drivers/acpi/acpi_memhotplug.c b/drivers/acpi/acpi_memhotplug.c index db8de39..712e767 100644 --- a/drivers/acpi/acpi_memhotplug.c +++ b/drivers/acpi/acpi_memhotplug.c @@ -323,9 +323,13 @@ static int acpi_memory_disable_device(struct acpi_memory_device *mem_device) */ list_for_each_entry_safe(info, n, &mem_device->res_list, list) { if (info->enabled) { - result = offline_memory(info->start_addr, info->length); - if (result) - return result; + if (!is_memblk_offline(info->start_addr, + info->length)) { + result = offline_memory(info->start_addr, + info->length); + if (result) + return result; + } } list_del(&info->list); kfree(info); -- 1.7.1 -- 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