+ pagemap-export-kpf_hwpoison.patch added to -mm tree

* + pagemap-export-kpf_hwpoison.patch added to -mm tree
@ 2009-09-02 21:42 akpm
  0 siblings, 0 replies; 2+ messages in thread
From: akpm @ 2009-09-02 21:42 UTC (permalink / raw)
  To: mm-commits
  Cc: fengguang.wu, aarcange, andi, chrisw, hugh.dickins, ieidus, josh,
	kosaki.motohiro, mpm


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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*** Remember to use Documentation/SubmitChecklist when testing your code ***

See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find
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@intel.com>

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@intel.com>
Cc: Izik Eidus <ieidus@redhat.com>
Cc: Chris Wright <chrisw@redhat.com>
Cc: Hugh Dickins <hugh.dickins@tiscali.co.uk>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andi Kleen <andi@firstfloor.org>
Cc: Matt Mackall <mpm@selenic.com>
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
Cc: Josh Triplett <josh@joshtriplett.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 Documentation/vm/pagemap.txt |    4 ++++
 fs/proc/page.c               |    5 +++++
 tools/vm/page-types.c        |    2 ++
 3 files changed, 11 insertions(+)

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
diff -puN tools/vm/page-types.c~pagemap-export-kpf_hwpoison tools/vm/page-types.c
--- a/tools/vm/page-types.c~pagemap-export-kpf_hwpoison
+++ a/tools/vm/page-types.c
@@ -47,6 +47,7 @@
 #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 */
@@ -94,6 +95,7 @@ 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",
_

Patches currently in -mm which might be from fengguang.wu@intel.com are

linux-next.patch
mm-memory-failure-remove-config_unevictable_lru-config-option.patch
readahead-add-blk_run_backing_dev.patch
readahead-add-blk_run_backing_dev-fix.patch
readahead-add-blk_run_backing_dev-fix-fix-2.patch
mm-clean-up-page_remove_rmap.patch
mm-oom-analysis-add-per-zone-statistics-to-show_free_areas.patch
mm-oom-analysis-add-buffer-cache-information-to-show_free_areas.patch
mm-oom-analysis-add-shmem-vmstat.patch
mm-shrink_inactive_list-nr_scan-accounting-fix-fix.patch
mm-vmstat-add-isolate-pages.patch
mm-vmstat-add-isolate-pages-fix.patch
vmscan-throttle-direct-reclaim-when-too-many-pages-are-isolated-already.patch
mm-remove-__addsub_zone_page_state.patch
mm-count-only-reclaimable-lru-pages-v2.patch
vmscan-move-clearpageactive-from-move_active_pages-to-shrink_active_list.patch
vmscan-kill-unnecessary-page-flag-test.patch
vmscan-kill-unnecessary-prefetch.patch
ksm-add-mmu_notifier-set_pte_at_notify.patch
ksm-first-tidy-up-madvise_vma.patch
ksm-define-madv_mergeable-and-madv_unmergeable.patch
ksm-the-mm-interface-to-ksm.patch
ksm-no-debug-in-page_dup_rmap.patch
ksm-identify-pageksm-pages.patch
ksm-kernel-samepage-merging.patch
ksm-prevent-mremap-move-poisoning.patch
ksm-change-copyright-message.patch
ksm-change-ksm-nice-level-to-be-5.patch
mm-do-batched-scans-for-mem_cgroup.patch
page-types-move-from-documentation-vm-to-tools-vm.patch
pagemap-export-kpf_hwpoison.patch
pagemap-document-kpf_ksm-and-show-it-in-page-types.patch
documentation-vm-gitignore-add-page-types.patch


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