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HWPOISON, hugetlb: isolate corrupted hugepage

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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: Andrew Morton <akpm@linux-foundation.org>
Acked-by: Fengguang Wu <fengguang.wu@intel.com>
Signed-off-by: Andi Kleen <ak@linux.intel.com>
This commit is contained in:
Naoya Horiguchi
2010-05-28 09:29:20 +09:00
committed by Andi Kleen
parent c9fbdd5f13
commit 93f70f900d
3 changed files with 38 additions and 8 deletions
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16
mm/hugetlb.c
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@@ -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);
}