hollalinux
/
linux-sg2042
mirror of https://github.com/sophgo/linux-riscv.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

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>
This commit is contained in:
Peter Zijlstra 2009-04-08 15:01:29 +02:00 committed by Ingo Molnar
parent 808382b33b
commit 8740f9418c
1 changed files with 6 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

10
include/linux/perf_counter.h
View File

@ -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];
};