From d6195a6a2c247515d5832debb51c03a74dc3f8f6 Mon Sep 17 00:00:00 2001 From: Arnaldo Carvalho de Melo Date: Mon, 13 Feb 2017 16:45:24 -0300 Subject: perf evsel: Inform how to make a sysctl setting permanent When a tool can't open counters due to the kernel.perf_event_paranoit sysctl setting, we inform how to tweak it to allow the operation to succeed, in addition to that, suggest setting /etc/sysctl.conf to make the setting permanent. Suggested-by: Ingo Molnar Cc: Adrian Hunter Cc: David Ahern Cc: Jiri Olsa Cc: Namhyung Kim Cc: Wang Nan Link: http://lkml.kernel.org/n/tip-4gwe99k4a6p12d4u8bbyttj2@git.kernel.org Signed-off-by: Arnaldo Carvalho de Melo --- tools/perf/builtin-record.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'tools/perf/builtin-record.c') diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c index ffac8ca9fb01..2ddf189968dc 100644 --- a/tools/perf/builtin-record.c +++ b/tools/perf/builtin-record.c @@ -418,7 +418,7 @@ static int record__mmap(struct record *rec) static int record__open(struct record *rec) { - char msg[512]; + char msg[BUFSIZ]; struct perf_evsel *pos; struct perf_evlist *evlist = rec->evlist; struct perf_session *session = rec->session; -- cgit v1.2.3