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| author | Naoya Horiguchi <n-horiguchi@ah.jp.nec.com> | 2017-07-10 15:47:32 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-10 16:32:30 -0700 |
| commit | 243abd5b7803d540280f029bc5224a4a2892579a (patch) | |
| tree | fb8d98f216bf4d98993765fefe00cb0eda0110c0 /mm/hugetlb.c | |
| parent | 241f01fbeda2521f802eeef4de0261387e6e9c1d (diff) | |
| download | linux-243abd5b7803d540280f029bc5224a4a2892579a.tar.gz linux-243abd5b7803d540280f029bc5224a4a2892579a.tar.bz2 linux-243abd5b7803d540280f029bc5224a4a2892579a.zip | |
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@linux.vnet.ibm.com)
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@ah.jp.nec.com
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Michal Hocko <mhocko@kernel.org>
Cc: "Aneesh Kumar K.V" <aneesh.kumar@linux.vnet.ibm.com>
Cc: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/hugetlb.c')
| -rw-r--r-- | mm/hugetlb.c | 3 |
1 files changed, 1 insertions, 2 deletions
diff --git a/mm/hugetlb.c b/mm/hugetlb.c index 1a88006ec634..41a1b48cefbf 100644 --- a/mm/hugetlb.c +++ b/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_node_exact(struct hstate *h, int nid) 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, |