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authorMel Gorman <mgorman@suse.de>2015-03-25 15:55:45 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-03-25 16:20:31 -0700
commitb7b04004ecd9e58cdc6c6ff92f251d5ac5c0adb2 (patch)
treec6a61e2101de2abb5b9ac16206ccae4f93c9c0a4
parent074c238177a75f5e79af3b2cb6a84e54823ef950 (diff)
downloadlinux-stericsson-b7b04004ecd9e58cdc6c6ff92f251d5ac5c0adb2.tar.gz
mm: numa: mark huge PTEs young when clearing NUMA hinting faults
Base PTEs are marked young when the NUMA hinting information is cleared but the same does not happen for huge pages which this patch addresses. Note that migrated pages are not marked young as the base page migration code does not assume that migrated pages have been referenced. This could be addressed but beyond the scope of this series which is aimed at Dave Chinners shrink workload that is unlikely to be affected by this issue. Signed-off-by: Mel Gorman <mgorman@suse.de> Cc: Dave Chinner <david@fromorbit.com> Cc: Ingo Molnar <mingo@kernel.org> Cc: Aneesh Kumar <aneesh.kumar@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--mm/huge_memory.c1
1 files changed, 1 insertions, 0 deletions
diff --git a/mm/huge_memory.c b/mm/huge_memory.c
index 51b3e7c64622..6817b0350c71 100644
--- a/mm/huge_memory.c
+++ b/mm/huge_memory.c
@@ -1358,6 +1358,7 @@ clear_pmdnuma:
BUG_ON(!PageLocked(page));
was_writable = pmd_write(pmd);
pmd = pmd_modify(pmd, vma->vm_page_prot);
+ pmd = pmd_mkyoung(pmd);
if (was_writable)
pmd = pmd_mkwrite(pmd);
set_pmd_at(mm, haddr, pmdp, pmd);