perf_evlist__config(evlist, &trace->opts, NULL);
if (callchain_param.enabled) {
- bool use_identifier = false;
-
if (trace->syscalls.events.sys_exit) {
perf_evsel__config_callchain(trace->syscalls.events.sys_exit,
&trace->opts, &callchain_param);
- use_identifier = true;
}
if (pgfault_maj) {
perf_evsel__config_callchain(pgfault_maj, &trace->opts, &callchain_param);
- use_identifier = true;
}
if (pgfault_min) {
perf_evsel__config_callchain(pgfault_min, &trace->opts, &callchain_param);
- use_identifier = true;
- }
-
- if (use_identifier) {
- /*
- * Now we have evsels with different sample_ids, use
- * PERF_SAMPLE_IDENTIFIER to map from sample to evsel
- * from a fixed position in each ring buffer record.
- *
- * As of this the changeset introducing this comment, this
- * isn't strictly needed, as the fields that can come before
- * PERF_SAMPLE_ID are all used, but we'll probably disable
- * some of those for things like copying the payload of
- * pointer syscall arguments, and for vfs_getname we don't
- * need PERF_SAMPLE_ADDR and PERF_SAMPLE_IP, so do this
- * here as a warning we need to use PERF_SAMPLE_IDENTIFIER.
- */
- perf_evlist__set_sample_bit(evlist, IDENTIFIER);
- perf_evlist__reset_sample_bit(evlist, ID);
}
}