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authorAneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>2013-12-06 00:08:22 +0530
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2013-12-09 11:40:23 +1100
commit5877231f646bbd6d1d545e7af83aaa6e6b746013 (patch)
treed0ca877cb929b73087aafa19ca884409391f0ebc /include/linux/mm.h
parent2c49195b6aedd21ff1cd1e095fab9866fba3411b (diff)
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mm: Move change_prot_numa outside CONFIG_ARCH_USES_NUMA_PROT_NONE
change_prot_numa should work even if _PAGE_NUMA != _PAGE_PROTNONE. On archs like ppc64 that don't use _PAGE_PROTNONE and also have a separate page table outside linux pagetable, we just need to make sure that when calling change_prot_numa we flush the hardware page table entry so that next page access result in a numa fault. We still need to make sure we use the numa faulting logic only when CONFIG_NUMA_BALANCING is set. This implies the migrate-on-fault (Lazy migration) via mbind will only work if CONFIG_NUMA_BALANCING is set. Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com> Reviewed-by: Rik van Riel <riel@redhat.com> Acked-by: Mel Gorman <mgorman@suse.de> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'include/linux/mm.h')
-rw-r--r--include/linux/mm.h2
1 files changed, 1 insertions, 1 deletions
diff --git a/include/linux/mm.h b/include/linux/mm.h
index 1cedd000cf29..a7b4e310bf42 100644
--- a/include/linux/mm.h
+++ b/include/linux/mm.h
@@ -1842,7 +1842,7 @@ static inline pgprot_t vm_get_page_prot(unsigned long vm_flags)
}
#endif
-#ifdef CONFIG_ARCH_USES_NUMA_PROT_NONE
+#ifdef CONFIG_NUMA_BALANCING
unsigned long change_prot_numa(struct vm_area_struct *vma,
unsigned long start, unsigned long end);
#endif