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-rw-r--r--include/linux/hugetlb.h4
-rw-r--r--mm/hugetlb.c29
-rw-r--r--mm/memory-failure.c6
3 files changed, 31 insertions, 8 deletions
diff --git a/include/linux/hugetlb.h b/include/linux/hugetlb.h
index 9e51f77d44c..796f30e0080 100644
--- a/include/linux/hugetlb.h
+++ b/include/linux/hugetlb.h
@@ -43,7 +43,7 @@ int hugetlb_reserve_pages(struct inode *inode, long from, long to,
struct vm_area_struct *vma,
int acctflags);
void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed);
-void __isolate_hwpoisoned_huge_page(struct page *page);
+int dequeue_hwpoisoned_huge_page(struct page *page);
void copy_huge_page(struct page *dst, struct page *src);
extern unsigned long hugepages_treat_as_movable;
@@ -102,7 +102,7 @@ static inline void hugetlb_report_meminfo(struct seq_file *m)
#define hugetlb_free_pgd_range(tlb, addr, end, floor, ceiling) ({BUG(); 0; })
#define hugetlb_fault(mm, vma, addr, flags) ({ BUG(); 0; })
#define huge_pte_offset(mm, address) 0
-#define __isolate_hwpoisoned_huge_page(page) 0
+#define dequeue_hwpoisoned_huge_page(page) 0
static inline void copy_huge_page(struct page *dst, struct page *src)
{
}
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 0fa9de8361b..deb7bebefe6 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c
@@ -2955,18 +2955,39 @@ void hugetlb_unreserve_pages(struct inode *inode, long offset, long freed)
hugetlb_acct_memory(h, -(chg - freed));
}
+/* Should be called in hugetlb_lock */
+static int is_hugepage_on_freelist(struct page *hpage)
+{
+ struct page *page;
+ struct page *tmp;
+ struct hstate *h = page_hstate(hpage);
+ int nid = page_to_nid(hpage);
+
+ list_for_each_entry_safe(page, tmp, &h->hugepage_freelists[nid], lru)
+ if (page == hpage)
+ return 1;
+ return 0;
+}
+
+#ifdef CONFIG_MEMORY_FAILURE
/*
* 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)
+int dequeue_hwpoisoned_huge_page(struct page *hpage)
{
struct hstate *h = page_hstate(hpage);
int nid = page_to_nid(hpage);
+ int ret = -EBUSY;
spin_lock(&hugetlb_lock);
- list_del(&hpage->lru);
- h->free_huge_pages--;
- h->free_huge_pages_node[nid]--;
+ if (is_hugepage_on_freelist(hpage)) {
+ list_del(&hpage->lru);
+ h->free_huge_pages--;
+ h->free_huge_pages_node[nid]--;
+ ret = 0;
+ }
spin_unlock(&hugetlb_lock);
+ return ret;
}
+#endif
diff --git a/mm/memory-failure.c b/mm/memory-failure.c
index 757f6b0accf..5c7158a1159 100644
--- a/mm/memory-failure.c
+++ b/mm/memory-failure.c
@@ -698,6 +698,7 @@ static int me_swapcache_clean(struct page *p, unsigned long pfn)
*/
static int me_huge_page(struct page *p, unsigned long pfn)
{
+ int res = 0;
struct page *hpage = compound_head(p);
/*
* We can safely recover from error on free or reserved (i.e.
@@ -710,8 +711,9 @@ static int me_huge_page(struct page *p, unsigned long pfn)
* so there is no race between isolation and mapping/unmapping.
*/
if (!(page_mapping(hpage) || PageAnon(hpage))) {
- __isolate_hwpoisoned_huge_page(hpage);
- return RECOVERED;
+ res = dequeue_hwpoisoned_huge_page(hpage);
+ if (!res)
+ return RECOVERED;
}
return DELAYED;
}