mm: send one IPI per CPU to TLB flush all entries after unmapping pages

[firefly-linux-kernel-4.4.55.git] / arch / x86 / Kconfig

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 48f7433dac6f5ac4e76b6a8841b3db0d45c5f19d..117e2f373e50d40cee118dcab42a0e86a617b2ee 100644 (file)
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -41,6 +41,7 @@ config X86
        select ARCH_USE_CMPXCHG_LOCKREF         if X86_64
        select ARCH_USE_QUEUED_RWLOCKS
        select ARCH_USE_QUEUED_SPINLOCKS
+       select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH if SMP
        select ARCH_WANTS_DYNAMIC_TASK_STRUCT
        select ARCH_WANT_FRAME_POINTERS
        select ARCH_WANT_IPC_PARSE_VERSION      if X86_32