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Revert "perf tools: Fix jump label always changing during tracing"

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This reverts commit deaff8b659.

This commit makes CLOEXEC feature undetected for normal users,
because per-cpu events are priviledged.

Reported-by: Peter Zijlstra <[email protected]>
Cc: Adrian Hunter <[email protected]>
Cc: David Ahern <[email protected]>
Cc: Frederic Weisbecker <[email protected]>
Cc: Namhyung Kim <[email protected]>
Cc: Paul Mackerras <[email protected]>
Cc: Peter Zijlstra <[email protected]>
Cc: Stephane Eranian <[email protected]>
Link: http://lkml.kernel.org/r/[email protected]
Signed-off-by: Jiri Olsa <[email protected]>
This commit is contained in:
Jiri Olsa 2014-07-28 15:58:47 +02:00
commit 8578b891ec
1 changed files with 2 additions and 7 deletions
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9
tools/perf/util/cloexec.c
View file

@ -1,4 +1,3 @@
#include <sched.h>
#include "util.h"
#include "../perf.h"
#include "cloexec.h"
@ -15,13 +14,9 @@ static int perf_flag_probe(void)
};
int fd;
int err;
int cpu = sched_getcpu();
if (cpu < 0)
cpu = 0;
/* check cloexec flag */
fd = sys_perf_event_open(&attr, -1, cpu, -1,
fd = sys_perf_event_open(&attr, 0, -1, -1,
PERF_FLAG_FD_CLOEXEC);
err = errno;
@ -35,7 +30,7 @@ static int perf_flag_probe(void)
err, strerror(err));
/* not supported, confirm error related to PERF_FLAG_FD_CLOEXEC */
fd = sys_perf_event_open(&attr, -1, cpu, -1, 0);
fd = sys_perf_event_open(&attr, 0, -1, -1, 0);
err = errno;
if (WARN_ONCE(fd < 0,