From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from psmtp.com (na3sys010amx148.postini.com [74.125.245.148]) by kanga.kvack.org (Postfix) with SMTP id 7D05F6B0073 for ; Fri, 19 Oct 2012 02:41:12 -0400 (EDT) From: wency@cn.fujitsu.com Subject: [PATCH v3 6/9] memory-hotplug: update mce_bad_pages when removing the memory Date: Fri, 19 Oct 2012 14:46:39 +0800 Message-Id: <1350629202-9664-7-git-send-email-wency@cn.fujitsu.com> In-Reply-To: <1350629202-9664-1-git-send-email-wency@cn.fujitsu.com> References: <1350629202-9664-1-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 | 19 +++++++++++++++++++ 1 files changed, 19 insertions(+), 0 deletions(-) diff --git a/mm/sparse.c b/mm/sparse.c index 0021265..77d6a93 100644 --- a/mm/sparse.c +++ b/mm/sparse.c @@ -774,6 +774,24 @@ out: return ret; } +#ifdef CONFIG_MEMORY_FAILURE +static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages) +{ + int i; + + for (i = 0; i < PAGES_PER_SECTION; i++) { + if (PageHWPoison(&memmap[i])) { + atomic_long_sub(1, &mce_bad_pages); + ClearPageHWPoison(&memmap[i]); + } + } +} +#else +static void clear_hwpoisoned_pages(struct page *memmap, int nr_pages) +{ +} +#endif + void sparse_remove_one_section(struct zone *zone, struct mem_section *ms) { struct page *memmap = NULL; @@ -785,6 +803,7 @@ void sparse_remove_one_section(struct zone *zone, struct mem_section *ms) __section_nr(ms)); ms->section_mem_map = 0; ms->pageblock_flags = NULL; + clear_hwpoisoned_pages(memmap, PAGES_PER_SECTION); } free_section_usemap(memmap, usemap); -- 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