perf top: Ignore kptr_restrict when not sampling the kernel (b89a5124) · Commits · 戴 / test

If all events have attr.exclude_kernel set, no need to look at kptr_restrict. Cc: Adrian Hunter <adrian.hunter@intel.com> Cc: David Ahern <dsahern@gmail.com> Cc: Jiri Olsa <jolsa@kernel.org> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Namhyung Kim <namhyung@kernel.org> Cc: Wang Nan <wangnan0@huawei.com> Link: http://lkml.kernel.org/n/tip-yegpzg5bf2im69g0tfizqaqz@git.kernel.org Signed-off-by:

Arnaldo Carvalho de Melo <acme@redhat.com>

tools/perf/builtin-top.c

+5 −3

Original line number	Diff line number	Diff line
		@@ -735,6 +735,7 @@ static void perf_event__process_sample(struct perf_tool *tool,
		if (!machine->kptr_restrict_warned &&
		symbol_conf.kptr_restrict &&
		al.cpumode == PERF_RECORD_MISC_KERNEL) {
		if (!perf_evlist__exclude_kernel(top->session->evlist)) {
		ui__warning(
		"Kernel address maps (/proc/{kallsyms,modules}) are restricted.\n\n"
		"Check /proc/sys/kernel/kptr_restrict.\n\n"
		@@ -743,6 +744,7 @@ static void perf_event__process_sample(struct perf_tool *tool,
		" modules" : "");
		if (use_browser <= 0)
		sleep(5);
		}
		machine->kptr_restrict_warned = true;
		}

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