x86: disallow Xen to enable NUMA_BALANCING

NUMA balancing is broken for Xen PV guest at the moment. Instead of
meddling with _PAGE_NUMA flags we disable NUMA balancing for Xen at the
moment, as _PAGE_NUMA is said to be removed in the future.

Suggested-by: Mel Gorman <mgorman@suse.de>
Signed-off-by: Wei Liu <wei.liu2@citrix.com>

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index ded8a6774ac99a6b9fd6708e440f66bc2f6e7433..c0885a3b868105646f829697fe2628426c20f34e 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -28,7 +28,7 @@ config X86
        select ARCH_MIGHT_HAVE_PC_SERIO
        select HAVE_AOUT if X86_32
        select HAVE_UNSTABLE_SCHED_CLOCK
-       select ARCH_SUPPORTS_NUMA_BALANCING if X86_64
+       select ARCH_SUPPORTS_NUMA_BALANCING if X86_64 && !XEN
        select ARCH_SUPPORTS_INT128 if X86_64
        select HAVE_IDE
        select HAVE_OPROFILE