+ hwpoison-hugetlbfs-fix-warning-on-freeing-hwpoisoned-hugepage.patch added to -mm tree

[akpm@linux-foundation.org]

The patch titled
     Subject: mm/hugetlb.c: fix warning on freeing hwpoisoned hugepage
has been added to the -mm tree.  Its filename is
     hwpoison-hugetlbfs-fix-warning-on-freeing-hwpoisoned-hugepage.patch

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------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Subject: mm/hugetlb.c: fix warning on freeing hwpoisoned hugepage

Fix the warning from __list_del_entry() which is triggered when a process
tries to do free_huge_page() for a hwpoisoned hugepage.

Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Cc: Andi Kleen <andi.kleen@intel.com>
Cc: Tony Luck <tony.luck@intel.com>
Cc: Wu Fengguang <fengguang.wu@intel.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 mm/hugetlb.c |    8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff -puN mm/hugetlb.c~hwpoison-hugetlbfs-fix-warning-on-freeing-hwpoisoned-hugepage mm/hugetlb.c
--- a/mm/hugetlb.c~hwpoison-hugetlbfs-fix-warning-on-freeing-hwpoisoned-hugepage
+++ a/mm/hugetlb.c
@@ -3178,7 +3178,13 @@ int dequeue_hwpoisoned_huge_page(struct 
 
 	spin_lock(&hugetlb_lock);
 	if (is_hugepage_on_freelist(hpage)) {
-		list_del(&hpage->lru);
+		/*
+		 * Hwpoisoned hugepage isn't linked to activelist or freelist,
+		 * but dangling hpage->lru can trigger list-debug warnings
+		 * (this happens when we call unpoison_memory() on it),
+		 * so let it point to itself with list_del_init().
+		 */
+		list_del_init(&hpage->lru);
 		set_page_refcounted(hpage);
 		h->free_huge_pages--;
 		h->free_huge_pages_node[nid]--;
_

Patches currently in -mm which might be from n-horiguchi@ah.jp.nec.com are

hwpoison-fix-action_result-to-print-out-dirty-clean.patch
mm-print-out-information-of-file-affected-by-memory-error.patch
hwpoison-hugetlbfs-fix-bad-pmd-warning-in-unmapping-hwpoisoned-hugepage.patch
hwpoison-hugetlbfs-fix-rss-counter-warning.patch
hwpoison-hugetlbfs-fix-rss-counter-warning-fix.patch
hwpoison-hugetlbfs-fix-rss-counter-warning-fix-fix.patch
hwpoison-hugetlbfs-fix-warning-on-freeing-hwpoisoned-hugepage.patch