Re: [PATCH 1/4] perf tools: Fix CLOEXEC probe for perf_event_paranoid == 2
Hi Adrian,
On Tue, 12 Aug 2014 18:04:28 +0300, Adrian Hunter wrote:
> With /proc/sys/kernel/perf_event_paranoid set to 2, the
> probe of PERF_FLAG_FD_CLOEXEC would fail. Fix by excluding
> kernel profiling from the probe event.
>
> Signed-off-by: Adrian Hunter
Acked-by: Namhyung Kim
Thanks,
Namhyung
> ---
> tools/perf/util/cloexec.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c
> index 5073c01..47c 100644
> --- a/tools/perf/util/cloexec.c
> +++ b/tools/perf/util/cloexec.c
> @@ -11,6 +11,7 @@ static int perf_flag_probe(void)
> struct perf_event_attr attr = {
> .type = PERF_TYPE_SOFTWARE,
> .config = PERF_COUNT_SW_CPU_CLOCK,
> + .exclude_kernel = 1,
> };
> int fd;
> int err;
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[PATCH 1/4] perf tools: Fix CLOEXEC probe for perf_event_paranoid == 2
With /proc/sys/kernel/perf_event_paranoid set to 2, the
probe of PERF_FLAG_FD_CLOEXEC would fail. Fix by excluding
kernel profiling from the probe event.
Signed-off-by: Adrian Hunter
---
tools/perf/util/cloexec.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/perf/util/cloexec.c b/tools/perf/util/cloexec.c
index 5073c01..47c 100644
--- a/tools/perf/util/cloexec.c
+++ b/tools/perf/util/cloexec.c
@@ -11,6 +11,7 @@ static int perf_flag_probe(void)
struct perf_event_attr attr = {
.type = PERF_TYPE_SOFTWARE,
.config = PERF_COUNT_SW_CPU_CLOCK,
+ .exclude_kernel = 1,
};
int fd;
int err;
--
1.8.3.2
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