| From | "Kirill A. Shutemov" <> | Subject | [PATCHv12 28/37] mm, numa: skip PTE-mapped THP on numa fault | Date | Tue, 6 Oct 2015 18:23:55 +0300 |
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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> --- mm/memory.c | 6 ++++++ 1 file changed, 6 insertions(+)
diff --git a/mm/memory.c b/mm/memory.c index f6e3c3b1aa29..d69e9ae023ce 100644 --- a/mm/memory.c +++ b/mm/memory.c @@ -3184,6 +3184,12 @@ 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 -- 2.5.3
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