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HWPOISON, hugetlb: maintain mce_bad_pages in handling hugepage error 

For now all pages in the error hugepage are considered as hwpoisoned,
so count all of them in mce_bad_pages.

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 09:29:19 +09:00 committed by Andi Kleen
parent 7013febc89
commit c9fbdd5f13
1 changed files with 10 additions and 5 deletions
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15
mm/memory-failure.c
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@ -942,6 +942,7 @@ int __memory_failure(unsigned long pfn, int trapno, int flags)
struct page *p;
struct page *hpage;
int res;
unsigned int nr_pages;
if (!sysctl_memory_failure_recovery)
panic("Memory failure from trap %d on page %lx", trapno, pfn);
@ -960,7 +961,8 @@ int __memory_failure(unsigned long pfn, int trapno, int flags)
return 0;
}
atomic_long_add(1, &mce_bad_pages);
nr_pages = 1 << compound_order(hpage);
atomic_long_add(nr_pages, &mce_bad_pages);
/*
* We need/can do nothing about count=0 pages.
@ -1024,7 +1026,7 @@ int __memory_failure(unsigned long pfn, int trapno, int flags)
}
if (hwpoison_filter(p)) {
if (TestClearPageHWPoison(p))
atomic_long_dec(&mce_bad_pages);
atomic_long_sub(nr_pages, &mce_bad_pages);
unlock_page(hpage);
put_page(hpage);
return 0;
@ -1123,6 +1125,7 @@ int unpoison_memory(unsigned long pfn)
struct page *page;
struct page *p;
int freeit = 0;
unsigned int nr_pages;
if (!pfn_valid(pfn))
return -ENXIO;
@ -1135,9 +1138,11 @@ int unpoison_memory(unsigned long pfn)
return 0;
}
nr_pages = 1 << compound_order(page);
if (!get_page_unless_zero(page)) {
if (TestClearPageHWPoison(p))
atomic_long_dec(&mce_bad_pages);
atomic_long_sub(nr_pages, &mce_bad_pages);
pr_debug("MCE: Software-unpoisoned free page %#lx\n", pfn);
return 0;
}
@ -1149,9 +1154,9 @@ int unpoison_memory(unsigned long pfn)
* the PG_hwpoison page will be caught and isolated on the entrance to
* the free buddy page pool.
*/
if (TestClearPageHWPoison(p)) {
if (TestClearPageHWPoison(page)) {
pr_debug("MCE: Software-unpoisoned page %#lx\n", pfn);
atomic_long_dec(&mce_bad_pages);
atomic_long_sub(nr_pages, &mce_bad_pages);
freeit = 1;
}
if (PageHuge(p))