The patch titled
Subject: mm/hugetlb.c: fix warning on freeing hwpoisoned hugepage
has been removed from the -mm tree. Its filename was
hwpoison-hugetlbfs-fix-warning-on-freeing-hwpoisoned-hugepage.patch
This patch was dropped because it was merged into mainline or a subsystem tree
------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
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.
free_huge_page() can be called for hwpoisoned hugepage from
unpoison_memory(). This function gets refcount once and clears
PageHWPoison, and then puts refcount twice to return the hugepage back to
free pool. The second put_page() finally reaches free_huge_page().
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Reviewed-by: Aneesh Kumar K.V <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Andi Kleen <andi.kleen@xxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
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
@@ -3172,7 +3172,13 @@ 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@xxxxxxxxxxxxx are
origin.patch
mm-print-out-information-of-file-affected-by-memory-error.patch
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