linux-kernel - [RFC 2/2] mm: skip HWPoisoned pages when onlining pages

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Date:   Thu, 20 Apr 2017 11:26:02 +0200
From:   Laurent Dufour <ldufour@...ux.vnet.ibm.com>
To:     Naoya Horiguchi <n-horiguchi@...jp.nec.com>
Cc:     linux-kernel@...r.kernel.org, linux-mm@...ck.org,
        akpm@...ux-foundation.org
Subject: [RFC 2/2] mm: skip HWPoisoned pages when onlining pages

The commit b023f46813cd ("memory-hotplug: skip HWPoisoned page when
offlining pages") skip the HWPoisoned pages when offlining pages, but
this should be skipped when onlining the pages too.

Signed-off-by: Laurent Dufour <ldufour@...ux.vnet.ibm.com>
---
 mm/memory_hotplug.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 6fa7208bcd56..20e1fadc2369 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -942,6 +942,8 @@ static int online_pages_range(unsigned long start_pfn, unsigned long nr_pages,
 	if (PageReserved(pfn_to_page(start_pfn)))
 		for (i = 0; i < nr_pages; i++) {
 			page = pfn_to_page(start_pfn + i);
+			if (PageHWPoison(page))
+				continue;
 			(*online_page_callback)(page);
 			onlined_pages++;
 		}
-- 
2.7.4