Subject: + mm-hwpoison-fix-the-lack-of-one-reference-count-against-poisoned-page.patch added to -mm tree
To: liwanp@xxxxxxxxxxxxxxxxxx,ak@xxxxxxxxxxxxxxx,n-horiguchi@xxxxxxxxxxxxx
From: akpm@xxxxxxxxxxxxxxxxxxxx
Date: Thu, 26 Sep 2013 11:54:45 -0700
The patch titled
Subject: mm/hwpoison: fix the lack of one reference count against poisoned page
has been added to the -mm tree. Its filename is
mm-hwpoison-fix-the-lack-of-one-reference-count-against-poisoned-page.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hwpoison-fix-the-lack-of-one-reference-count-against-poisoned-page.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hwpoison-fix-the-lack-of-one-reference-count-against-poisoned-page.patch
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From: Wanpeng Li <liwanp@xxxxxxxxxxxxxxxxxx>
Subject: mm/hwpoison: fix the lack of one reference count against poisoned page
The lack of one reference count against poisoned page for hwpoison_inject
w/o hwpoison_filter enabled result in hwpoison detect -1 users still
referenced the page, however, the number should be 0 except the poison
handler held one after successfully unmap. This patch fix it by hold one
referenced count against poisoned page for hwpoison_inject w/ and w/o
hwpoison_filter enabled.
Before patch:
[ 71.902112] Injecting memory failure at pfn 224706
[ 71.902137] MCE 0x224706: dirty LRU page recovery: Failed
[ 71.902138] MCE 0x224706: dirty LRU page still referenced by -1 users
After patch:
[ 94.710860] Injecting memory failure at pfn 215b68
[ 94.710885] MCE 0x215b68: dirty LRU page recovery: Recovered
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/hwpoison-inject.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff -puN mm/hwpoison-inject.c~mm-hwpoison-fix-the-lack-of-one-reference-count-against-poisoned-page mm/hwpoison-inject.c
--- a/mm/hwpoison-inject.c~mm-hwpoison-fix-the-lack-of-one-reference-count-against-poisoned-page
+++ a/mm/hwpoison-inject.c
@@ -20,8 +20,6 @@ static int hwpoison_inject(void *data, u
if (!capable(CAP_SYS_ADMIN))
return -EPERM;
- if (!hwpoison_filter_enable)
- goto inject;
if (!pfn_valid(pfn))
return -ENXIO;
@@ -33,6 +31,9 @@ static int hwpoison_inject(void *data, u
if (!get_page_unless_zero(hpage))
return 0;
+ if (!hwpoison_filter_enable)
+ goto inject;
+
if (!PageLRU(p) && !PageHuge(p))
shake_page(p, 0);
/*
_
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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