The patch titled
pagemap: export KPF_HWPOISON
has been added to the -mm tree. Its filename is
pagemap-export-kpf_hwpoison.patch
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out what to do about this
The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: pagemap: export KPF_HWPOISON
From: Wu Fengguang <fengguang.wu@xxxxxxxxx>
This flag indicates a hardware detected memory corruption on the page.
Any future access of the page data may bring down the machine.
Signed-off-by: Wu Fengguang <fengguang.wu@xxxxxxxxx>
Cc: Andi Kleen <andi@xxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
Documentation/vm/page-types.c | 2 ++
Documentation/vm/pagemap.txt | 4 ++++
fs/proc/page.c | 5 +++++
3 files changed, 11 insertions(+)
diff -puN Documentation/vm/page-types.c~pagemap-export-kpf_hwpoison Documentation/vm/page-types.c
--- a/Documentation/vm/page-types.c~pagemap-export-kpf_hwpoison
+++ a/Documentation/vm/page-types.c
@@ -69,6 +69,7 @@
#define KPF_COMPOUND_TAIL 16
#define KPF_HUGE 17
#define KPF_UNEVICTABLE 18
+#define KPF_HWPOISON 19
#define KPF_NOPAGE 20
/* [32-] kernel hacking assistances */
@@ -116,6 +117,7 @@ static char *page_flag_names[] = {
[KPF_COMPOUND_TAIL] = "T:compound_tail",
[KPF_HUGE] = "G:huge",
[KPF_UNEVICTABLE] = "u:unevictable",
+ [KPF_HWPOISON] = "X:hwpoison",
[KPF_NOPAGE] = "n:nopage",
[KPF_RESERVED] = "r:reserved",
diff -puN Documentation/vm/pagemap.txt~pagemap-export-kpf_hwpoison Documentation/vm/pagemap.txt
--- a/Documentation/vm/pagemap.txt~pagemap-export-kpf_hwpoison
+++ a/Documentation/vm/pagemap.txt
@@ -57,6 +57,7 @@ There are three components to pagemap:
16. COMPOUND_TAIL
16. HUGE
18. UNEVICTABLE
+ 19. HWPOISON
20. NOPAGE
Short descriptions to the page flags:
@@ -86,6 +87,9 @@ Short descriptions to the page flags:
17. HUGE
this is an integral part of a HugeTLB page
+19. HWPOISON
+ hardware detected memory corruption on this page: don't touch the data!
+
20. NOPAGE
no page frame exists at the requested address
diff -puN fs/proc/page.c~pagemap-export-kpf_hwpoison fs/proc/page.c
--- a/fs/proc/page.c~pagemap-export-kpf_hwpoison
+++ a/fs/proc/page.c
@@ -94,6 +94,7 @@ static const struct file_operations proc
#define KPF_COMPOUND_TAIL 16
#define KPF_HUGE 17
#define KPF_UNEVICTABLE 18
+#define KPF_HWPOISON 19
#define KPF_NOPAGE 20
#define KPF_KSM 21
@@ -180,6 +181,10 @@ static u64 get_uflags(struct page *page)
u |= kpf_copy_bit(k, KPF_UNEVICTABLE, PG_unevictable);
u |= kpf_copy_bit(k, KPF_MLOCKED, PG_mlocked);
+#ifdef CONFIG_MEMORY_FAILURE
+ u |= kpf_copy_bit(k, KPF_HWPOISON, PG_hwpoison);
+#endif
+
#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR
u |= kpf_copy_bit(k, KPF_UNCACHED, PG_uncached);
#endif
_
Patches currently in -mm which might be from fengguang.wu@xxxxxxxxx are
linux-next.patch
pagemap-export-kpf_hwpoison.patch
pagemap-document-kpf_ksm-and-show-it-in-page-types.patch
page-types-add-gpl-note.patch
page-types-introduce-checked_open.patch
page-types-make-standalone-pagemap-kpageflags-read-routines.patch
page-types-make-voffset-local-variables.patch
page-types-introduce-kpageflags_flags.patch
page-types-add-hwpoison-unpoison-feature.patch
readahead-add-blk_run_backing_dev.patch
mm-vsmcan-check-shrink_active_list-sc-isolate_pages-return-value.patch
dev-mem-remove-redundant-test-on-len.patch
dev-mem-introduce-size_inside_page.patch
dev-mem-cleanup-unxlate_dev_mem_ptr-calls.patch
dev-mem-cleanup-unxlate_dev_mem_ptr-calls-fix.patch
dev-mem-cleanup-unxlate_dev_mem_ptr-calls-fix-fix.patch
dev-mem-make-size_inside_page-logic-straight.patch
dev-mem-remove-the-written-variable-in-write_kmem.patch
dev-mem-remove-the-written-variable-in-write_kmem-fix.patch
dev-mem-remove-redundant-parameter-from-do_write_kmem.patch
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