From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1755858Ab2I0FkG (ORCPT ); Thu, 27 Sep 2012 01:40:06 -0400 Received: from cn.fujitsu.com ([222.73.24.84]:37649 "EHLO song.cn.fujitsu.com" rhost-flags-OK-FAIL-OK-OK) by vger.kernel.org with ESMTP id S1755204Ab2I0Fj2 (ORCPT ); Thu, 27 Sep 2012 01:39:28 -0400 X-IronPort-AV: E=Sophos;i="4.80,494,1344182400"; d="scan'208";a="5925255" From: wency@cn.fujitsu.com To: linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: rientjes@google.com, liuj97@gmail.com, len.brown@intel.com, benh@kernel.crashing.org, paulus@samba.org, minchan.kim@gmail.com, akpm@linux-foundation.org, kosaki.motohiro@jp.fujitsu.com, isimatu.yasuaki@jp.fujitsu.com, Wen Congyang Subject: [PATCH 3/4] memory-hotplug: clear hwpoisoned flag when onlining pages Date: Thu, 27 Sep 2012 13:45:04 +0800 Message-Id: <1348724705-23779-4-git-send-email-wency@cn.fujitsu.com> X-Mailer: git-send-email 1.7.1 In-Reply-To: <1348724705-23779-1-git-send-email-wency@cn.fujitsu.com> References: <1348724705-23779-1-git-send-email-wency@cn.fujitsu.com> X-MIMETrack: Itemize by SMTP Server on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/09/27 13:39:34, Serialize by Router on mailserver/fnst(Release 8.5.3|September 15, 2011) at 2012/09/27 13:39:37, Serialize complete at 2012/09/27 13:39:37 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Wen Congyang hwpoisoned may set when we offline a page by the sysfs interface /sys/devices/system/memory/soft_offline_page or /sys/devices/system/memory/hard_offline_page. If we don't clear this flag when onlining pages, this page can't be freed, and will not in free list. So we can't offline these pages again. So we should clear this flag when onlining pages. CC: David Rientjes CC: Jiang Liu CC: Len Brown CC: Benjamin Herrenschmidt CC: Paul Mackerras Cc: Minchan Kim CC: Andrew Morton CC: KOSAKI Motohiro CC: Yasuaki Ishimatsu Signed-off-by: Wen Congyang --- mm/memory_hotplug.c | 8 ++++++++ 1 files changed, 8 insertions(+), 0 deletions(-) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 6a5b90d..9a5b10f 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -431,6 +431,14 @@ EXPORT_SYMBOL_GPL(__online_page_increment_counters); void __online_page_free(struct page *page) { +#ifdef CONFIG_MEMORY_FAILURE + /* The page may be marked HWPoisoned by soft/hard offline page */ + if (PageHWPoison(page)) { + atomic_long_sub(1, &mce_bad_pages); + ClearPageHWPoison(page); + } +#endif + ClearPageReserved(page); init_page_count(page); __free_page(page); -- 1.7.1