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Date: Wed, 5 Sep 2012 17:25:54 +0800 From: wency@...fujitsu.com To: x86@...nel.org, linux-mm@...ck.org, linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org, linux-acpi@...r.kernel.org, linux-s390@...r.kernel.org, linux-sh@...r.kernel.org, linux-ia64@...r.kernel.org, cmetcalf@...era.com, sparclinux@...r.kernel.org Cc: rientjes@...gle.com, liuj97@...il.com, len.brown@...el.com, benh@...nel.crashing.org, paulus@...ba.org, cl@...ux.com, minchan.kim@...il.com, akpm@...ux-foundation.org, kosaki.motohiro@...fujitsu.com, isimatu.yasuaki@...fujitsu.com, Wen Congyang <wency@...fujitsu.com> Subject: [RFC v9 PATCH 20/21] memory-hotplug: clear hwpoisoned flag when onlining pages From: Wen Congyang <wency@...fujitsu.com> 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 <rientjes@...gle.com> CC: Jiang Liu <liuj97@...il.com> CC: Len Brown <len.brown@...el.com> CC: Benjamin Herrenschmidt <benh@...nel.crashing.org> CC: Paul Mackerras <paulus@...ba.org> CC: Christoph Lameter <cl@...ux.com> Cc: Minchan Kim <minchan.kim@...il.com> CC: Andrew Morton <akpm@...ux-foundation.org> CC: KOSAKI Motohiro <kosaki.motohiro@...fujitsu.com> CC: Yasuaki Ishimatsu <isimatu.yasuaki@...fujitsu.com> Signed-off-by: Wen Congyang <wency@...fujitsu.com> --- mm/memory_hotplug.c | 5 +++++ 1 files changed, 5 insertions(+), 0 deletions(-) diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c index 270c249..140c080 100644 --- a/mm/memory_hotplug.c +++ b/mm/memory_hotplug.c @@ -661,6 +661,11 @@ 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 */ + ClearPageHWPoison(page); +#endif + ClearPageReserved(page); init_page_count(page); __free_page(page); -- 1.7.1 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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