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Subject[PATCH] perf events: remove 64bit alignment padding from perf_event_context
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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>

---
patch against v3.0-rc2
compiled & tested on x86_64

regards
Richard


diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 3412684..9d5b3d5 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -919,8 +919,8 @@ 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;
};

/*



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