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| author | Kirill A. Shutemov | 2016-01-16 01:53:49 +0100 |
|---|---|---|
| committer | Linus Torvalds | 2016-01-16 02:56:32 +0100 |
| commit | e81c48024f43b4aabe1ec4709786fa1f96814717 (patch) | |
| tree | 1e65d154b4f0786782526d72da3c9b09a330aab8 /mm/memory.c | |
| parent | mm: differentiate page_mapped() from page_mapcount() for compound pages (diff) | |
| download | kernel-qcow2-linux-e81c48024f43b4aabe1ec4709786fa1f96814717.tar.gz kernel-qcow2-linux-e81c48024f43b4aabe1ec4709786fa1f96814717.tar.xz kernel-qcow2-linux-e81c48024f43b4aabe1ec4709786fa1f96814717.zip | |
mm, numa: skip PTE-mapped THP on numa fault
We're going to have THP mapped with PTEs. It will confuse
numabalancing. Let's skip them for now.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Tested-by: Sasha Levin <sasha.levin@oracle.com>
Tested-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Acked-by: Jerome Marchand <jmarchan@redhat.com>
Cc: Vlastimil Babka <vbabka@suse.cz>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Dave Hansen <dave.hansen@intel.com>
Cc: Mel Gorman <mgorman@suse.de>
Cc: Rik van Riel <riel@redhat.com>
Cc: Naoya Horiguchi <n-horiguchi@ah.jp.nec.com>
Cc: Steve Capper <steve.capper@linaro.org>
Cc: Johannes Weiner <hannes@cmpxchg.org>
Cc: Michal Hocko <mhocko@suse.cz>
Cc: Christoph Lameter <cl@linux.com>
Cc: David Rientjes <rientjes@google.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm/memory.c')
| -rw-r--r-- | mm/memory.c | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/mm/memory.c b/mm/memory.c index 9b0dbc2f0b9a..9d5b40892d4d 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3193,6 +3193,12 @@ static int do_numa_page(struct mm_struct *mm, struct vm_area_struct *vma, return 0; } + /* TODO: handle PTE-mapped THP */ + if (PageCompound(page)) { + pte_unmap_unlock(ptep, ptl); + return 0; + } + /* * Avoid grouping on RO pages in general. RO pages shouldn't hurt as * much anyway since they can be in shared cache state. This misses |