Commit 8740f941 authored Apr 08, 2009 by Peter Zijlstra Committed by Ingo Molnar Apr 08, 2009

perf_counter: add some comments



Add a few comments because I was forgetting what field what for what
functionality.

Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Corey Ashford <cjashfor@linux.vnet.ibm.com>
LKML-Reference: <20090408130409.036984214@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

parent 808382b3

include/linux/perf_counter.h

+6 −4

Original line number	Diff line number	Diff line
		@@ -344,10 +344,12 @@ struct file;

		struct perf_mmap_data {
		struct rcu_head rcu_head;
		int nr_pages;
		atomic_t wakeup;
		atomic_t head;
		atomic_t events;
		int nr_pages; /* nr of data pages */

		atomic_t wakeup; /* POLL_ for wakeups */
		atomic_t head; /* write position */
		atomic_t events; /* event limit */

		struct perf_counter_mmap_page *user_page;
		void *data_pages[0];
		};