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

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Message-Id: <1453824219-51437-3-git-send-email-Waiman.Long@hpe.com>
Date:	Tue, 26 Jan 2016 11:03:38 -0500
From:	Waiman Long <Waiman.Long@....com>
To:	Thomas Gleixner <tglx@...utronix.de>,
	Ingo Molnar <mingo@...hat.com>,
	"H. Peter Anvin" <hpa@...or.com>,
	Alexander Viro <viro@...iv.linux.org.uk>
Cc:	linux-fsdevel@...r.kernel.org, x86@...nel.org,
	linux-kernel@...r.kernel.org,
	Peter Zijlstra <peterz@...radead.org>,
	Scott J Norton <scott.norton@...com>,
	Douglas Hatch <doug.hatch@...com>,
	Waiman Long <Waiman.Long@....com>
Subject: [RFC PATCH 2/3] lib/list_batch, x86: Enable list insertion/deletion batching in x86-64

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@....com>
---
 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