Commit-ID: f140373bc904d9541e3f8e985d3810864e34c735 Gitweb: http://git.kernel.org/tip/f140373bc904d9541e3f8e985d3810864e34c735 Author: Jiri Olsa <[email protected]> AuthorDate: Thu, 13 Nov 2014 18:21:03 +0100 Committer: Arnaldo Carvalho de Melo <[email protected]> CommitDate: Wed, 19 Nov 2014 12:33:48 -0300
perf evsel: Fix ftrace:function event recording Following patch fails (-EINVAL) ftrace:function with enabled user space callchains: cfa77bc4af2c perf: Disallow user-space callchains for function trace events We need to follow in perf tool itself and explicitly set the perf_event_attr::exclude_callchain_user flag for ftrace:function event. Reported-by: Steven Rostedt <[email protected]> Signed-off-by: Jiri Olsa <[email protected]> Cc: Corey Ashford <[email protected]> Cc: David Ahern <[email protected]> Cc: Frederic Weisbecker <[email protected]> Cc: Ingo Molnar <[email protected]> Cc: Namhyung Kim <[email protected]> Cc: Paul Mackerras <[email protected]> Cc: Peter Zijlstra <[email protected]> Cc: Steven Rostedt <[email protected]> Link: http://lkml.kernel.org/r/[email protected] Signed-off-by: Arnaldo Carvalho de Melo <[email protected]> --- tools/perf/util/evsel.c | 8 ++++++++ 1 file changed, 8 insertions(+) diff --git a/tools/perf/util/evsel.c b/tools/perf/util/evsel.c index 34344ff..f2dc91f 100644 --- a/tools/perf/util/evsel.c +++ b/tools/perf/util/evsel.c @@ -658,6 +658,14 @@ void perf_evsel__config(struct perf_evsel *evsel, struct record_opts *opts) attr->mmap_data = track; } + /* + * We don't allow user space callchains for function trace + * event, due to issues with page faults while tracing page + * fault handler and its overall trickiness nature. + */ + if (perf_evsel__is_function_event(evsel)) + evsel->attr.exclude_callchain_user = 1; + if (callchain_param.enabled && !evsel->no_aux_samples) perf_evsel__config_callgraph(evsel); -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
