Subject: + mm-hwpoison-fix-false-report-2nd-try-page-recovery.patch added to -mm tree
To: liwanp@xxxxxxxxxxxxxxxxxx,ak@xxxxxxxxxxxxxxx,n-horiguchi@xxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 26 Sep 2013 11:54:44 -0700
The patch titled
Subject: mm/hwpoison: fix false report on 2nd attempt at page recovery
has been added to the -mm tree. Its filename is
mm-hwpoison-fix-false-report-2nd-try-page-recovery.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hwpoison-fix-false-report-2nd-try-page-recovery.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hwpoison-fix-false-report-2nd-try-page-recovery.patch
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------------------------------------------------------
From: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx>
Subject: mm/hwpoison: fix false report on 2nd attempt at page recovery
If the page is poisoned by software injection w/ MF_COUNT_INCREASED flag,
there is a false report during the 2nd attempt at page recovery which is
not truthful. This patch fixes it by reporting the first attempt to try
free buddy page recovery if MF_COUNT_INCREASED is set.
Before patch:
[ 346.332041] Injecting memory failure at pfn 200010
[ 346.332189] MCE 0x200010: free buddy, 2nd try page recovery: Delayed
After patch:
[ 297.742600] Injecting memory failure at pfn 200010
[ 297.742941] MCE 0x200010: free buddy page recovery: Delayed
Reviewed-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Acked-by: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Signed-off-by: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/memory-failure.c | 6 ++++--
1 file changed, 4 insertions(+), 2 deletions(-)
diff -puN mm/memory-failure.c~mm-hwpoison-fix-false-report-2nd-try-page-recovery mm/memory-failure.c
--- a/mm/memory-failure.c~mm-hwpoison-fix-false-report-2nd-try-page-recovery
+++ a/mm/memory-failure.c
@@ -1114,8 +1114,10 @@ int memory_failure(unsigned long pfn, in
* shake_page could have turned it free.
*/
if (is_free_buddy_page(p)) {
- action_result(pfn, "free buddy, 2nd try",
- DELAYED);
+ if (flags & MF_COUNT_INCREASED)
+ action_result(pfn, "free buddy", DELAYED);
+ else
+ action_result(pfn, "free buddy, 2nd try", DELAYED);
return 0;
}
action_result(pfn, "non LRU", IGNORED);
_
Patches currently in -mm which might be from liwanp@xxxxxxxxxxxxxxxxxx are
revert-mm-memory-hotplug-fix-lowmem-count-overflow-when-offline-pages.patch
mm-compactionc-periodically-schedule-when-freeing-pages.patch
mm-hwpoison-fix-traverse-hugetlbfs-page-to-avoid-printk-flood.patch
mm-hwpoison-fix-miss-catch-transparent-huge-page.patch
mm-hwpoison-fix-false-report-2nd-try-page-recovery.patch
mm-hwpoison-fix-the-lack-of-one-reference-count-against-poisoned-page.patch
ksm-remove-redundant-__gfp_zero-from-kcalloc.patch
mm-huge_memoryc-fix-stale-comments-of-transparent_hugepage_flags.patch
mm-memory-failurec-move-set_migratetype_isolate-outside-get_any_page.patch
mm-vmalloc-dont-set-area-caller-twice.patch
mm-vmalloc-fix-show-vmap_area-information-race-with-vmap_area-tear-down.patch
mm-vmalloc-revert-mm-vmallocc-check-vm_uninitialized-flag-in-s_show-instead-of-show_numa_info.patch
revert-mm-vmallocc-emit-the-failure-message-before-return.patch
memblock-factor-out-of-top-down-allocation.patch
memblock-introduce-bottom-up-allocation-mode.patch
x86-mm-factor-out-of-top-down-direct-mapping-setup.patch
x86-mem-hotplug-support-initialize-page-tables-in-bottom-up.patch
x86-acpi-crash-kdump-do-reserve_crashkernel-after-srat-is-parsed.patch
mem-hotplug-introduce-movablenode-boot-option.patch
mm-thp-cleanup-mv-alloc_hugepage-to-better-place.patch
mm-thp-khugepaged-add-policy-for-finding-target-node.patch
mm-drop-actor-argument-of-do_generic_file_read.patch
mm-drop-actor-argument-of-do_generic_file_read-fix.patch
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