Messages in this thread Patch in this message | | | From | Arnaldo Carvalho de Melo <> | Subject | [PATCH 06/12] libperf: Setup initial evlist::all_cpus value | Date | Thu, 16 Jan 2020 10:48:08 -0300 |
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From: Jiri Olsa <jolsa@kernel.org>
Jann Horn reported crash in perf ftrace because evlist::all_cpus isn't initialized if there's evlist without events, which is the case for perf ftrace.
Adding initial initialization of evlist::all_cpus from given cpus, regardless of events in the evlist.
Fixes: 7736627b865d ("perf stat: Use affinity for closing file descriptors") Reported-by: Jann Horn <jannh@google.com> Signed-off-by: Jiri Olsa <jolsa@kernel.org> Acked-by: Andi Kleen <ak@linux.intel.com> Cc: Alexander Shishkin <alexander.shishkin@linux.intel.com> Cc: Michael Petlan <mpetlan@redhat.com> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Peter Zijlstra <peterz@infradead.org> Link: http://lore.kernel.org/lkml/20200110151537.153012-1-jolsa@kernel.org Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com> --- tools/lib/perf/evlist.c | 3 +++ 1 file changed, 3 insertions(+)
diff --git a/tools/lib/perf/evlist.c b/tools/lib/perf/evlist.c index ae9e65aa2491..5b9f2ca50591 100644 --- a/tools/lib/perf/evlist.c +++ b/tools/lib/perf/evlist.c @@ -164,6 +164,9 @@ void perf_evlist__set_maps(struct perf_evlist *evlist, evlist->threads = perf_thread_map__get(threads); } + if (!evlist->all_cpus && cpus) + evlist->all_cpus = perf_cpu_map__get(cpus); + perf_evlist__propagate_maps(evlist); } -- 2.21.1
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