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perf_counter: sysctl for system wide perf counters

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Impact: add sysctl for paranoid/relaxed perfcounters policy

Allow the use of system wide perf counters to everybody, but provide
a sysctl to disable it for the paranoid security minded.

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: <20090409085524.514046352@chello.nl>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Peter Zijlstra 2009-04-09 10:53:45 +02:00 • committed by Ingo Molnar
commit 1ccd154978
3 changed files with 16 additions and 1 deletions
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2
include/linux/perf_counter.h
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@ -568,6 +568,8 @@ struct perf_callchain_entry {
extern struct perf_callchain_entry *perf_callchain(struct pt_regs *regs);
extern int sysctl_perf_counter_priv;
#else
static inline void
perf_counter_task_sched_in(struct task_struct *task, int cpu) { }