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

[akpm@linux-foundation.org]

The patch titled
     Subject: hwpoison, hugetlbfs: 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

Before you just go and hit "reply", please:
   a) Consider who else should be cc'ed
   b) Prefer to cc a suitable mailing list as well
   c) Ideally: find the original patch on the mailing list and do a
      reply-to-all to that, adding suitable additional cc's

*** Remember to use Documentation/SubmitChecklist when testing your code ***

The -mm tree is included into linux-next and is updated
there every 3-4 working days

------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Subject: hwpoison, hugetlbfs: 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.

Originally, page->lru of hugetlbfs head page was dangling when the
hugepage was in use.  This behavior has changed by commit 0edaecfab218d7
("hugetlb: add a list for tracking in-use HugeTLB pages"), where hugepages
in use are linked to hugepage_activelist.  HWpoisoned hugepages should not
be charged to any process, so we introduce another list to link hwpoisoned
hugepages.

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

 include/linux/hugetlb.h |    3 +++
 mm/hugetlb.c            |    3 ++-
 2 files changed, 5 insertions(+), 1 deletion(-)

diff -puN include/linux/hugetlb.h~hwpoison-hugetlbfs-fix-warning-on-freeing-hwpoisoned-hugepage include/linux/hugetlb.h
--- a/include/linux/hugetlb.h~hwpoison-hugetlbfs-fix-warning-on-freeing-hwpoisoned-hugepage
+++ a/include/linux/hugetlb.h
@@ -237,6 +237,9 @@ struct hstate {
 	unsigned long nr_overcommit_huge_pages;
 	struct list_head hugepage_activelist;
 	struct list_head hugepage_freelists[MAX_NUMNODES];
+#ifdef CONFIG_MEMORY_FAILURE
+	struct list_head hugepage_hwpoisonedlist;
+#endif
 	unsigned int nr_huge_pages_node[MAX_NUMNODES];
 	unsigned int free_huge_pages_node[MAX_NUMNODES];
 	unsigned int surplus_huge_pages_node[MAX_NUMNODES];
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
@@ -1939,6 +1939,7 @@ void __init hugetlb_add_hstate(unsigned 
 	for (i = 0; i < MAX_NUMNODES; ++i)
 		INIT_LIST_HEAD(&h->hugepage_freelists[i]);
 	INIT_LIST_HEAD(&h->hugepage_activelist);
+	INIT_LIST_HEAD(&h->hugepage_hwpoisonedlist);
 	h->next_nid_to_alloc = first_node(node_states[N_MEMORY]);
 	h->next_nid_to_free = first_node(node_states[N_MEMORY]);
 	snprintf(h->name, HSTATE_NAME_LEN, "hugepages-%lukB",
@@ -3176,7 +3177,7 @@ int dequeue_hwpoisoned_huge_page(struct 
 
 	spin_lock(&hugetlb_lock);
 	if (is_hugepage_on_freelist(hpage)) {
-		list_del(&hpage->lru);
+		list_move(&hpage->lru, &h->hugepage_hwpoisonedlist);
 		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-warning-on-freeing-hwpoisoned-hugepage.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