HWPOISON, hugetlb: isolate corrupted hugepage

[linux-2.6-block.git] / mm / hugetlb.c

diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index aa3c517393782af5cd8741add7f88bf07c500ef1..8c163f64cf1076ce6b3fed95ad5ee0e30990eada 100644 (file)
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2825,3 +2825,19 @@ void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed)
        hugetlb_put_quota(inode->i_mapping, (chg - freed));
        hugetlb_acct_memory(h, -(chg - freed));
 }
+
+/*
+ * This function is called from memory failure code.
+ * Assume the caller holds page lock of the head page.
+ */
+void __isolate_hwpoisoned_huge_page(struct page *hpage)
+{
+       struct hstate *h = page_hstate(hpage);
+       int nid = page_to_nid(hpage);
+
+       spin_lock(&hugetlb_lock);
+       list_del(&hpage->lru);
+       h->free_huge_pages--;
+       h->free_huge_pages_node[nid]--;
+       spin_unlock(&hugetlb_lock);
+}