[RFC PATCH 2/3] lib/list_batch, x86: Enable list insertion/deletion batching in x86-64

[Waiman Long]

System with a large number of CPUs will benefit from the list batching
facility. This patch enables it for x86-64 as 32-bit i386 is not
likely to get much gain from it.

Signed-off-by: Waiman Long <Waiman.Long@xxxxxxx>
---
 arch/x86/Kconfig |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index 330e738..443e41d 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -42,6 +42,7 @@ config X86
 	select ARCH_SUPPORTS_NUMA_BALANCING	if X86_64
 	select ARCH_USE_BUILTIN_BSWAP
 	select ARCH_USE_CMPXCHG_LOCKREF		if X86_64
+	select ARCH_USE_LIST_BATCHING		if X86_64
 	select ARCH_USE_QUEUED_RWLOCKS
 	select ARCH_USE_QUEUED_SPINLOCKS
 	select ARCH_WANT_BATCHED_UNMAP_TLB_FLUSH if SMP
-- 
1.7.1