From: Richard Kennedy <richard@rsk.demon.co.uk>
Date: Tue, 7 Jun 2011 15:33:38 +0000 (+0100)
Subject: perf: Remove 64-bit alignment padding from perf_event_context
X-Git-Tag: v3.1-rc1~299^2~34
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=28009ce4a8130af7260a9271901b4419834ad152;p=platform%2Fupstream%2Fkernel-adaptation-pc.git

perf: Remove 64-bit alignment padding from perf_event_context

Reorder perf_event_context to remove 8 bytes of 64 bit alignment padding
shrinking its size to 192 bytes, allowing it to fit into a smaller slab
and use one fewer cache lines.

Signed-off-by: Richard Kennedy <richard@rsk.demon.co.uk>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Link: http://lkml.kernel.org/r/1307460819.1950.5.camel@castor.rsk
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index e76a410..2f7b5d4 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -894,8 +894,8 @@ struct perf_event_context {
 	u64				parent_gen;
 	u64				generation;
 	int				pin_count;
-	struct rcu_head			rcu_head;
 	int				nr_cgroups; /* cgroup events present */
+	struct rcu_head			rcu_head;
 };
 
 /*