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| author |   Anshuman Khandual <khandual@linux.vnet.ibm.com> | 2017-07-10 15:47:41 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2017-07-10 16:32:30 -0700 |
| commit | c3114a84f7f96c9d5c73c8bfa7e21ff42fda97e2 (patch) | |
| tree | dc4ccb50cd7cc3498137147af22c91e23c3d0b61 /mm/memory-failure.c | |
| parent | mm: hwpoison: change PageHWPoison behavior on hugetlb pages (diff) | |
| download | linux-dev-c3114a84f7f96c9d5c73c8bfa7e21ff42fda97e2.tar.xz linux-dev-c3114a84f7f96c9d5c73c8bfa7e21ff42fda97e2.zip | |
mm: hugetlb: soft-offline: dissolve source hugepage after successful migration
Currently hugepage migrated by soft-offline (i.e. due to correctable
memory errors) is contained as a hugepage, which means many non-error
pages in it are unreusable, i.e. wasted.
This patch solves this issue by dissolving source hugepages into buddy.
As done in previous patch, PageHWPoison is set only on a head page of
the error hugepage. Then in dissoliving we move the PageHWPoison flag
to the raw error page so that all healthy subpages return back to buddy.
[arnd@arndb.de: fix warnings: replace some macros with inline functions]
Link: http://lkml.kernel.org/r/20170609102544.2947326-1-arnd@arndb.de
Link: http://lkml.kernel.org/r/1496305019-5493-5-git-send-email-n-horiguchi@ah.jp.nec.com
Signed-off-by: Anshuman Khandual <khandual@linux.vnet.ibm.com>
Signed-off-by: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to '')
| -rw-r--r-- | mm/memory-failure.c | 5 |
1 files changed, 1 insertions, 4 deletions
diff --git a/mm/memory-failure.c b/mm/memory-failure.c index a9ddb0e72f5b..42c5803e6275 100644 --- a/mm/memory-failure.c +++ b/mm/memory-failure.c @@ -1575,11 +1575,8 @@ static int soft_offline_huge_page(struct page *page, int flags) if (ret > 0) ret = -EIO; } else { - /* overcommit hugetlb page will be freed to buddy */ - SetPageHWPoison(page); if (PageHuge(page)) - dequeue_hwpoisoned_huge_page(hpage); - num_poisoned_pages_inc(); + dissolve_free_huge_page(page); } return ret; } |