The patch titled
Subject: mm: hugetlb: prevent reuse of hwpoisoned free hugepages
has been added to the -mm tree. Its filename is
mm-hugetlb-prevent-reuse-of-hwpoisoned-free-hugepages.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/mm-hugetlb-prevent-reuse-of-hwpoisoned-free-hugepages.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/mm-hugetlb-prevent-reuse-of-hwpoisoned-free-hugepages.patch
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------------------------------------------------------
From: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Subject: mm: hugetlb: prevent reuse of hwpoisoned free hugepages
Patch series "mm: hwpoison: fixlet for hugetlb migration".
This patchset updates the hwpoison/hugetlb code to address 2 reported
issues.
One is madvise(MADV_HWPOISON) failure reported by Intel's lkp robot (see
http://lkml.kernel.org/r/20170417055948.GM31394@yexl-desktop.) First half
was already fixed in mainline, and another half about hugetlb cases are
solved in this series.
Another issue is "narrow-down error affected region into a single 4kB page
instead of a whole hugetlb page" issue, which was tried by Anshuman
(http://lkml.kernel.org/r/20170420110627.12307-1-khandual@xxxxxxxxxxxxxxxxxx)
and I updated it to apply it more widely.
This patch (of 9):
We no longer use MIGRATE_ISOLATE to prevent reuse of hwpoison hugepages as
we did before. So current dequeue_huge_page_node() doesn't work as
intended because it still uses is_migrate_isolate_page() for this check.
This patch fixes it with PageHWPoison flag.
Link: http://lkml.kernel.org/r/1496305019-5493-2-git-send-email-n-horiguchi@xxxxxxxxxxxxx
Signed-off-by: Naoya Horiguchi <n-horiguchi@xxxxxxxxxxxxx>
Cc: Michal Hocko <mhocko@xxxxxxxxxx>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@xxxxxxxxxxxxxxxxxx>
Cc: Anshuman Khandual <khandual@xxxxxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/hugetlb.c | 3 +--
mm/memory-failure.c | 1 -
2 files changed, 1 insertion(+), 3 deletions(-)
diff -puN mm/hugetlb.c~mm-hugetlb-prevent-reuse-of-hwpoisoned-free-hugepages mm/hugetlb.c
--- a/mm/hugetlb.c~mm-hugetlb-prevent-reuse-of-hwpoisoned-free-hugepages
+++ a/mm/hugetlb.c
@@ -22,7 +22,6 @@
#include <linux/rmap.h>
#include <linux/swap.h>
#include <linux/swapops.h>
-#include <linux/page-isolation.h>
#include <linux/jhash.h>
#include <asm/page.h>
@@ -872,7 +871,7 @@ static struct page *dequeue_huge_page_no
struct page *page;
list_for_each_entry(page, &h->hugepage_freelists[nid], lru)
- if (!is_migrate_isolate_page(page))
+ if (!PageHWPoison(page))
break;
/*
* if 'non-isolated free hugepage' not found on the list,
diff -puN mm/memory-failure.c~mm-hugetlb-prevent-reuse-of-hwpoisoned-free-hugepages mm/memory-failure.c
--- a/mm/memory-failure.c~mm-hugetlb-prevent-reuse-of-hwpoisoned-free-hugepages
+++ a/mm/memory-failure.c
@@ -49,7 +49,6 @@
#include <linux/swap.h>
#include <linux/backing-dev.h>
#include <linux/migrate.h>
-#include <linux/page-isolation.h>
#include <linux/suspend.h>
#include <linux/slab.h>
#include <linux/swapops.h>
_
Patches currently in -mm which might be from n-horiguchi@xxxxxxxxxxxxx are
mm-drop-null-return-check-of-pte_offset_map_lock.patch
mm-hugetlb-prevent-reuse-of-hwpoisoned-free-hugepages.patch
mm-hugetlb-return-immediately-for-hugetlb-page-in-__delete_from_page_cache.patch
mm-hwpoison-change-pagehwpoison-behavior-on-hugetlb-pages.patch
mm-soft-offline-dissolve-free-hugepage-if-soft-offlined.patch
mm-hwpoison-introduce-memory_failure_hugetlb.patch
mm-hwpoison-dissolve-in-use-hugepage-in-unrecoverable-memory-error.patch
mm-hugetlb-delete-dequeue_hwpoisoned_huge_page.patch
mm-hwpoison-introduce-idenfity_page_state.patch
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