If error hugepage is not in-use, we can fully recovery from error
by dequeuing it from freelist, so return RECOVERY.
Otherwise whether or not we can recovery depends on user processes,
so return DELAYED.
Dependency:
"HWPOISON, hugetlb: enable error handling path for hugepage"
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Wu Fengguang <fengguang.wu@intel.com>
---
include/linux/hugetlb.h | 2 ++
mm/hugetlb.c | 16 ++++++++++++++++
mm/memory-failure.c | 28 ++++++++++++++++++++--------
3 files changed, 38 insertions(+), 8 deletions(-)
diff --git v2.6.34/include/linux/hugetlb.h v2.6.34/include/linux/hugetlb.h
index e688fd8..f479700 100644
--- v2.6.34/include/linux/hugetlb.h
+++ v2.6.34/include/linux/hugetlb.h
@@ -43,6 +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);
extern unsigned long hugepages_treat_as_movable;
extern const unsigned long hugetlb_zero, hugetlb_infinity;
@@ -100,6 +101,7 @@ 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 hugetlb_change_protection(vma, address, end, newprot)
diff --git v2.6.34/mm/hugetlb.c v2.6.34/mm/hugetlb.c
index b1aa0d8..aaba3cc 100644
--- v2.6.34/mm/hugetlb.c
+++ v2.6.34/mm/hugetlb.c
@@ -2821,3 +2821,19 @@ 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 ...
