Commit c9fbdd5f authored by Naoya Horiguchi's avatar Naoya Horiguchi Committed by Andi Kleen
Browse files

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.

  "HWPOISON, hugetlb: enable error handling path for hugepage"
Signed-off-by: default avatarNaoya Horiguchi <>
Cc: Andrew Morton <>
Acked-by: default avatarFengguang Wu <>
Signed-off-by: default avatarAndi Kleen <>
parent 7013febc
......@@ -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_sub(nr_pages, &mce_bad_pages);
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_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_sub(nr_pages, &mce_bad_pages);
freeit = 1;
if (PageHuge(p))
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