linux-kernel - [PATCH] fs: Move bh_cachep to the __read

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Message-Id: <201204241422.23065.vlad@scalemp.com>
Date:	Tue, 24 Apr 2012 14:22:22 +0300
From:	Vlad Zolotarov <vlad@...lemp.com>
To:	"linux-kernel" <linux-kernel@...r.kernel.org>
Cc:	alan@...rguk.ukuu.org.uk,
	"Shai Fultheim (Shai@...leMP.com)" <Shai@...lemp.com>,
	"H. Peter Anvin" <hpa@...or.com>, Ingo Molnar <mingo@...hat.com>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: [PATCH] fs: Move bh_cachep to the __read_mostly section

From: Shai Fultheim <shai@...lemp.com>

bh_cachep is only written to once on initialization, so move it to the
__read_mostly section.

Signed-off-by: Shai Fultheim <shai@...lemp.com>
Signed-off-by: Vlad Zolotarov <vlad@...lemp.com>
---
 fs/buffer.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)

diff --git a/fs/buffer.c b/fs/buffer.c
index 36d6665..a1d82fb 100644
--- a/fs/buffer.c
+++ b/fs/buffer.c
@@ -3151,7 +3151,7 @@ SYSCALL_DEFINE2(bdflush, int, func, long, data)
 /*
  * Buffer-head allocation
  */
-static struct kmem_cache *bh_cachep;
+static struct kmem_cache *bh_cachep __read_mostly;
 
 /*
  * Once the number of bh's in the machine exceeds this level, we start
-- 
1.7.7.6

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