path: root/mm/memory-failure.c
diff options
authorAnshuman Khandual <khandual@linux.vnet.ibm.com>2017-07-10 15:47:41 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-07-10 16:32:30 -0700
commitc3114a84f7f96c9d5c73c8bfa7e21ff42fda97e2 (patch)
treedc4ccb50cd7cc3498137147af22c91e23c3d0b61 /mm/memory-failure.c
parentmm: hwpoison: change PageHWPoison behavior on hugetlb pages (diff)
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 '')
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;