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-rw-r--r--tools/perf/builtin-record.c42
1 files changed, 30 insertions, 12 deletions
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index 3d7f33e19df2..003255910c05 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -339,6 +339,22 @@ static int record__open(struct record *rec)
struct perf_evsel_config_term *err_term;
int rc = 0;
+ /*
+ * For initial_delay we need to add a dummy event so that we can track
+ * PERF_RECORD_MMAP while we wait for the initial delay to enable the
+ * real events, the ones asked by the user.
+ */
+ if (opts->initial_delay) {
+ if (perf_evlist__add_dummy(evlist))
+ return -ENOMEM;
+
+ pos = perf_evlist__first(evlist);
+ pos->tracking = 0;
+ pos = perf_evlist__last(evlist);
+ pos->tracking = 1;
+ pos->attr.enable_on_exec = 1;
+ }
+
perf_evlist__config(evlist, opts, &callchain_param);
evlist__for_each_entry(evlist, pos) {
@@ -749,17 +765,19 @@ static int record__synthesize(struct record *rec, bool tail)
goto out;
}
- err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
- machine);
- WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n"
- "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
- "Check /proc/kallsyms permission or run as root.\n");
-
- err = perf_event__synthesize_modules(tool, process_synthesized_event,
- machine);
- WARN_ONCE(err < 0, "Couldn't record kernel module information.\n"
- "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
- "Check /proc/modules permission or run as root.\n");
+ if (!perf_evlist__exclude_kernel(rec->evlist)) {
+ err = perf_event__synthesize_kernel_mmap(tool, process_synthesized_event,
+ machine);
+ WARN_ONCE(err < 0, "Couldn't record kernel reference relocation symbol\n"
+ "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
+ "Check /proc/kallsyms permission or run as root.\n");
+
+ err = perf_event__synthesize_modules(tool, process_synthesized_event,
+ machine);
+ WARN_ONCE(err < 0, "Couldn't record kernel module information.\n"
+ "Symbol resolution may be skewed if relocation was used (e.g. kexec).\n"
+ "Check /proc/modules permission or run as root.\n");
+ }
if (perf_guest) {
machines__process_guests(&session->machines,
@@ -1693,7 +1711,7 @@ int cmd_record(int argc, const char **argv)
err = -ENOMEM;
- if (symbol_conf.kptr_restrict)
+ if (symbol_conf.kptr_restrict && !perf_evlist__exclude_kernel(rec->evlist))
pr_warning(
"WARNING: Kernel address maps (/proc/{kallsyms,modules}) are restricted,\n"
"check /proc/sys/kernel/kptr_restrict.\n\n"