From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx152.postini.com [74.125.245.152]) by kanga.kvack.org (Postfix) with SMTP id 26A2B6B005D for ; Wed, 17 Oct 2012 08:03:21 -0400 (EDT) From: wency@cn.fujitsu.com Subject: [PATCH v2 2/5] memory-hotplug: update mce_bad_pages when removing the memory Date: Wed, 17 Oct 2012 20:08:52 +0800 Message-Id: <1350475735-26136-3-git-send-email-wency@cn.fujitsu.com> In-Reply-To: <1350475735-26136-1-git-send-email-wency@cn.fujitsu.com> References: <1350475735-26136-1-git-send-email-wency@cn.fujitsu.com> Sender: owner-linux-mm@kvack.org List-ID: 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 , Christoph Lameter From: Wen Congyang When we hotremove a memory device, we will free the memory to store struct page. If the page is hwpoisoned page, we should decrease mce_bad_pages. 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 --- mm/sparse.c | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-) diff --git a/mm/sparse.c b/mm/sparse.c index fac95f2..24072e4 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -773,6 +773,23 @@ out: return ret; } +#ifdef CONFIG_MEMORY_FAILURE +static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages) +{ + int i; + + if (!memmap) + return; + + for (i = 0; i < PAGES_PER_SECTION; i++) { + if (PageHWPoison(&memmap[i])) { + atomic_long_sub(1, &mce_bad_pages); + ClearPageHWPoison(&memmap[i]); + } + } +} +#endif + void sparse_remove_one_section(struct zone *zone, struct mem_section *ms) { struct page *memmap = NULL; @@ -786,6 +803,10 @@ void sparse_remove_one_section(struct zone *zone, struct mem_section *ms) ms->pageblock_flags = NULL; } +#ifdef CONFIG_MEMORY_FAILURE + clear_hwpoisoned_pages(memmap, PAGES_PER_SECTION); +#endif + free_section_usemap(memmap, usemap); } #endif -- 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