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Date:   Mon, 20 Feb 2017 11:35:44 -0300
From:   Arnaldo Carvalho de Melo <acme@...nel.org>
To:     Namhyung Kim <namhyung@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Peter Zijlstra <a.p.zijlstra@...llo.nl>,
        Jiri Olsa <jolsa@...nel.org>,
        LKML <linux-kernel@...r.kernel.org>, kernel-team@....com
Subject: Re: [PATCH 2/6] perf utils: Check verbose flag properly

Em Fri, Feb 17, 2017 at 05:17:38PM +0900, Namhyung Kim escreveu:
> It now can have negative value to suppress the message entirely.  So it
> needs to check it being positive.

find tools/perf -name "*.[chly]" | xargs grep -w verbose 

Shows several other places, I'm trying to plug those, fixed it up in
your patch and left a committer note, please check and see if all is
right.

- Arnaldo

diff --git a/tools/perf/builtin-diff.c b/tools/perf/builtin-diff.c
index 70a289347591..7ad0d78ea743 100644
--- a/tools/perf/builtin-diff.c
+++ b/tools/perf/builtin-diff.c
@@ -744,7 +744,7 @@ static void data_process(void)
 
 		first = false;
 
-		if (verbose || data__files_cnt > 2)
+		if (verbose > 0 || data__files_cnt > 2)
 			data__fprintf();
 
 		/* Don't sort callchain for perf diff */
diff --git a/tools/perf/builtin-mem.c b/tools/perf/builtin-mem.c
index cd7bc4d104e2..6114e07ca613 100644
--- a/tools/perf/builtin-mem.c
+++ b/tools/perf/builtin-mem.c
@@ -42,8 +42,8 @@ static int parse_record_events(const struct option *opt,
 
 		fprintf(stderr, "%-13s%-*s%s\n",
 			e->tag,
-			verbose ? 25 : 0,
-			verbose ? perf_mem_events__name(j) : "",
+			verbose > 0 ? 25 : 0,
+			verbose > 0 ? perf_mem_events__name(j) : "",
 			e->supported ? ": available" : "");
 	}
 	exit(0);
diff --git a/tools/perf/builtin-record.c b/tools/perf/builtin-record.c
index b87bbef73394..451b11e35c26 100644
--- a/tools/perf/builtin-record.c
+++ b/tools/perf/builtin-record.c
@@ -432,7 +432,7 @@ static int record__open(struct record *rec)
 try_again:
 		if (perf_evsel__open(pos, pos->cpus, pos->threads) < 0) {
 			if (perf_evsel__fallback(pos, errno, msg, sizeof(msg))) {
-				if (verbose)
+				if (verbose > 0)
 					ui__warning("%s\n", msg);
 				goto try_again;
 			}
diff --git a/tools/perf/builtin-report.c b/tools/perf/builtin-report.c
index dbd7fa028861..a94488114bbf 100644
--- a/tools/perf/builtin-report.c
+++ b/tools/perf/builtin-report.c
@@ -1009,7 +1009,7 @@ int cmd_report(int argc, const char **argv, const char *prefix __maybe_unused)
  		 * providing it only in verbose mode not to bloat too
  		 * much struct symbol.
  		 */
-		if (verbose) {
+		if (verbose > 0) {
 			/*
 			 * XXX: Need to provide a less kludgy way to ask for
 			 * more space per symbol, the u32 is for the index on
diff --git a/tools/perf/builtin-sched.c b/tools/perf/builtin-sched.c
index 270eb2d8ca6b..b94cf0de715a 100644
--- a/tools/perf/builtin-sched.c
+++ b/tools/perf/builtin-sched.c
@@ -460,7 +460,7 @@ static struct task_desc *register_pid(struct perf_sched *sched,
 	BUG_ON(!sched->tasks);
 	sched->tasks[task->nr] = task;
 
-	if (verbose)
+	if (verbose > 0)
 		printf("registered task #%ld, PID %ld (%s)\n", sched->nr_tasks, pid, comm);
 
 	return task;
@@ -794,7 +794,7 @@ replay_wakeup_event(struct perf_sched *sched,
 	const u32 pid	 = perf_evsel__intval(evsel, sample, "pid");
 	struct task_desc *waker, *wakee;
 
-	if (verbose) {
+	if (verbose > 0) {
 		printf("sched_wakeup event %p\n", evsel);
 
 		printf(" ... pid %d woke up %s/%d\n", sample->tid, comm, pid);
@@ -822,7 +822,7 @@ static int replay_switch_event(struct perf_sched *sched,
 	int cpu = sample->cpu;
 	s64 delta;
 
-	if (verbose)
+	if (verbose > 0)
 		printf("sched_switch event %p\n", evsel);
 
 	if (cpu >= MAX_CPUS || cpu < 0)
@@ -870,7 +870,7 @@ static int replay_fork_event(struct perf_sched *sched,
 		goto out_put;
 	}
 
-	if (verbose) {
+	if (verbose > 0) {
 		printf("fork event\n");
 		printf("... parent: %s/%d\n", thread__comm_str(parent), parent->tid);
 		printf("...  child: %s/%d\n", thread__comm_str(child), child->tid);
@@ -1573,7 +1573,7 @@ static int map_switch_event(struct perf_sched *sched, struct perf_evsel *evsel,
 
 	timestamp__scnprintf_usec(timestamp, stimestamp, sizeof(stimestamp));
 	color_fprintf(stdout, color, "  %12s secs ", stimestamp);
-	if (new_shortname || (verbose && sched_in->tid)) {
+	if (new_shortname || (verbose > 0 && sched_in->tid)) {
 		const char *pid_color = color;
 
 		if (thread__has_color(sched_in))
@@ -2050,7 +2050,7 @@ static void save_task_callchain(struct perf_sched *sched,
 
 	if (thread__resolve_callchain(thread, cursor, evsel, sample,
 				      NULL, NULL, sched->max_stack + 2) != 0) {
-		if (verbose)
+		if (verbose > 0)
 			error("Failed to resolve callchain. Skipping\n");
 
 		return;
diff --git a/tools/perf/builtin-stat.c b/tools/perf/builtin-stat.c
index 9989b03c21f2..13b54999ad79 100644
--- a/tools/perf/builtin-stat.c
+++ b/tools/perf/builtin-stat.c
@@ -573,7 +573,7 @@ static int __run_perf_stat(int argc, const char **argv)
 			if (errno == EINVAL || errno == ENOSYS ||
 			    errno == ENOENT || errno == EOPNOTSUPP ||
 			    errno == ENXIO) {
-				if (verbose)
+				if (verbose > 0)
 					ui__warning("%s event is not supported by the kernel.\n",
 						    perf_evsel__name(counter));
 				counter->supported = false;
@@ -582,7 +582,7 @@ static int __run_perf_stat(int argc, const char **argv)
 				    !(counter->leader->nr_members > 1))
 					continue;
 			} else if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
-                                if (verbose)
+                                if (verbose > 0)
                                         ui__warning("%s\n", msg);
                                 goto try_again;
                         }
@@ -2539,7 +2539,7 @@ int cmd_stat(int argc, const char **argv, const char *prefix __maybe_unused)
 
 	status = 0;
 	for (run_idx = 0; forever || run_idx < run_count; run_idx++) {
-		if (run_count != 1 && verbose)
+		if (run_count != 1 && verbose > 0)
 			fprintf(output, "[ perf stat: executing run #%d ... ]\n",
 				run_idx + 1);
 
diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 5a7fd7af3a6d..ab9077915763 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -871,7 +871,7 @@ static int perf_top__start_counters(struct perf_top *top)
 		if (perf_evsel__open(counter, top->evlist->cpus,
 				     top->evlist->threads) < 0) {
 			if (perf_evsel__fallback(counter, errno, msg, sizeof(msg))) {
-				if (verbose)
+				if (verbose > 0)
 					ui__warning("%s\n", msg);
 				goto try_again;
 			}
diff --git a/tools/perf/builtin-trace.c b/tools/perf/builtin-trace.c
index 40ef9b293d1b..256f1fac6f7e 100644
--- a/tools/perf/builtin-trace.c
+++ b/tools/perf/builtin-trace.c
@@ -1399,7 +1399,7 @@ static struct syscall *trace__syscall_info(struct trace *trace,
 	return &trace->syscalls.table[id];
 
 out_cant_read:
-	if (verbose) {
+	if (verbose > 0) {
 		fprintf(trace->output, "Problems reading syscall %d", id);
 		if (id <= trace->syscalls.max && trace->syscalls.table[id].name != NULL)
 			fprintf(trace->output, "(%s)", trace->syscalls.table[id].name);
@@ -1801,10 +1801,10 @@ static void print_location(FILE *f, struct perf_sample *sample,
 			   bool print_dso, bool print_sym)
 {
 
-	if ((verbose || print_dso) && al->map)
+	if ((verbose > 0 || print_dso) && al->map)
 		fprintf(f, "%s@", al->map->dso->long_name);
 
-	if ((verbose || print_sym) && al->sym)
+	if ((verbose > 0 || print_sym) && al->sym)
 		fprintf(f, "%s+0x%" PRIx64, al->sym->name,
 			al->addr - al->sym->start);
 	else if (al->map)
diff --git a/tools/perf/pmu-events/json.c b/tools/perf/pmu-events/json.c
index f67bbb0aa36e..0544398d6e2d 100644
--- a/tools/perf/pmu-events/json.c
+++ b/tools/perf/pmu-events/json.c
@@ -49,7 +49,7 @@ static char *mapfile(const char *fn, size_t *size)
 	int err;
 	int fd = open(fn, O_RDONLY);
 
-	if (fd < 0 && verbose && fn) {
+	if (fd < 0 && verbose > 0 && fn) {
 		pr_err("Error opening events file '%s': %s\n", fn,
 				strerror(errno));
 	}
diff --git a/tools/perf/tests/attr.c b/tools/perf/tests/attr.c
index 28d1605b0338..88dc51f4c27b 100644
--- a/tools/perf/tests/attr.c
+++ b/tools/perf/tests/attr.c
@@ -144,7 +144,7 @@ static int run_dir(const char *d, const char *perf)
 	int vcnt = min(verbose, (int) sizeof(v) - 1);
 	char cmd[3*PATH_MAX];
 
-	if (verbose)
+	if (verbose > 0)
 		vcnt++;
 
 	snprintf(cmd, 3*PATH_MAX, PYTHON " %s/attr.py -d %s/attr/ -p %s %.*s",
diff --git a/tools/perf/tests/builtin-test.c b/tools/perf/tests/builtin-test.c
index 37e326bfd2dc..83c4669cbc5b 100644
--- a/tools/perf/tests/builtin-test.c
+++ b/tools/perf/tests/builtin-test.c
@@ -299,7 +299,7 @@ static int run_test(struct test *test, int subtest)
 		if (!dont_fork) {
 			pr_debug("test child forked, pid %d\n", getpid());
 
-			if (!verbose) {
+			if (verbose <= 0) {
 				int nullfd = open("/dev/null", O_WRONLY);
 
 				if (nullfd >= 0) {
diff --git a/tools/perf/tests/code-reading.c b/tools/perf/tests/code-reading.c
index ff5bc6363a79..d1f693041324 100644
--- a/tools/perf/tests/code-reading.c
+++ b/tools/perf/tests/code-reading.c
@@ -599,7 +599,7 @@ static int do_test_code_reading(bool try_kcore)
 				continue;
 			}
 
-			if (verbose) {
+			if (verbose > 0) {
 				char errbuf[512];
 				perf_evlist__strerror_open(evlist, errno, errbuf, sizeof(errbuf));
 				pr_debug("perf_evlist__open() failed!\n%s\n", errbuf);
diff --git a/tools/perf/tests/fdarray.c b/tools/perf/tests/fdarray.c
index a2b5ff9bf83d..bc5982f42dc3 100644
--- a/tools/perf/tests/fdarray.c
+++ b/tools/perf/tests/fdarray.c
@@ -19,7 +19,7 @@ static int fdarray__fprintf_prefix(struct fdarray *fda, const char *prefix, FILE
 {
 	int printed = 0;
 
-	if (!verbose)
+	if (verbose <= 0)
 		return 0;
 
 	printed += fprintf(fp, "\n%s: ", prefix);
diff --git a/tools/perf/tests/llvm.c b/tools/perf/tests/llvm.c
index d357dab72e68..482b5365e68d 100644
--- a/tools/perf/tests/llvm.c
+++ b/tools/perf/tests/llvm.c
@@ -76,7 +76,7 @@ test_llvm__fetch_bpf_obj(void **p_obj_buf,
 	 * Skip this test if user's .perfconfig doesn't set [llvm] section
 	 * and clang is not found in $PATH, and this is not perf test -v
 	 */
-	if (!force && (verbose == 0 &&
+	if (!force && (verbose <= 0 &&
 		       !llvm_param.user_set_param &&
 		       llvm__search_clang())) {
 		pr_debug("No clang and no verbosive, skip this test\n");
diff --git a/tools/perf/tests/parse-events.c b/tools/perf/tests/parse-events.c
index aa9276bfe3e9..1dc838014422 100644
--- a/tools/perf/tests/parse-events.c
+++ b/tools/perf/tests/parse-events.c
@@ -1808,7 +1808,7 @@ static void debug_warn(const char *warn, va_list params)
 {
 	char msg[1024];
 
-	if (!verbose)
+	if (verbose <= 0)
 		return;
 
 	vsnprintf(msg, sizeof(msg), warn, params);
diff --git a/tools/perf/tests/perf-record.c b/tools/perf/tests/perf-record.c
index 541da7a68f91..87893f3ba5f1 100644
--- a/tools/perf/tests/perf-record.c
+++ b/tools/perf/tests/perf-record.c
@@ -172,13 +172,13 @@ int test__PERF_RECORD(int subtest __maybe_unused)
 
 				err = perf_evlist__parse_sample(evlist, event, &sample);
 				if (err < 0) {
-					if (verbose)
+					if (verbose > 0)
 						perf_event__fprintf(event, stderr);
 					pr_debug("Couldn't parse sample\n");
 					goto out_delete_evlist;
 				}
 
-				if (verbose) {
+				if (verbose > 0) {
 					pr_info("%" PRIu64" %d ", sample.time, sample.cpu);
 					perf_event__fprintf(event, stderr);
 				}
diff --git a/tools/perf/tests/python-use.c b/tools/perf/tests/python-use.c
index 7a52834ee0d0..fa79509da535 100644
--- a/tools/perf/tests/python-use.c
+++ b/tools/perf/tests/python-use.c
@@ -15,7 +15,7 @@ int test__python_use(int subtest __maybe_unused)
 	int ret;
 
 	if (asprintf(&cmd, "echo \"import sys ; sys.path.append('%s'); import perf\" | %s %s",
-		     PYTHONPATH, PYTHON, verbose ? "" : "2> /dev/null") < 0)
+		     PYTHONPATH, PYTHON, verbose > 0 ? "" : "2> /dev/null") < 0)
 		return -1;
 
 	ret = system(cmd) ? -1 : 0;
diff --git a/tools/perf/tests/thread-map.c b/tools/perf/tests/thread-map.c
index a4a4b4625ac3..f2d2e542d0ee 100644
--- a/tools/perf/tests/thread-map.c
+++ b/tools/perf/tests/thread-map.c
@@ -109,7 +109,7 @@ int test__thread_map_remove(int subtest __maybe_unused)
 	TEST_ASSERT_VAL("failed to allocate thread_map",
 			threads);
 
-	if (verbose)
+	if (verbose > 0)
 		thread_map__fprintf(threads, stderr);
 
 	TEST_ASSERT_VAL("failed to remove thread",
@@ -117,7 +117,7 @@ int test__thread_map_remove(int subtest __maybe_unused)
 
 	TEST_ASSERT_VAL("thread_map count != 1", threads->nr == 1);
 
-	if (verbose)
+	if (verbose > 0)
 		thread_map__fprintf(threads, stderr);
 
 	TEST_ASSERT_VAL("failed to remove thread",
@@ -125,7 +125,7 @@ int test__thread_map_remove(int subtest __maybe_unused)
 
 	TEST_ASSERT_VAL("thread_map count != 0", threads->nr == 0);
 
-	if (verbose)
+	if (verbose > 0)
 		thread_map__fprintf(threads, stderr);
 
 	TEST_ASSERT_VAL("failed to not remove thread",
diff --git a/tools/perf/tests/vmlinux-kallsyms.c b/tools/perf/tests/vmlinux-kallsyms.c
index a5082331f246..862b043e5924 100644
--- a/tools/perf/tests/vmlinux-kallsyms.c
+++ b/tools/perf/tests/vmlinux-kallsyms.c
@@ -168,7 +168,7 @@ int test__vmlinux_matches_kallsyms(int subtest __maybe_unused)
 		err = -1;
 	}
 
-	if (!verbose)
+	if (verbose <= 0)
 		goto out;
 
 	header_printed = false;
diff --git a/tools/perf/ui/browsers/map.c b/tools/perf/ui/browsers/map.c
index 98a34664bb7e..9ce142de536d 100644
--- a/tools/perf/ui/browsers/map.c
+++ b/tools/perf/ui/browsers/map.c
@@ -73,7 +73,7 @@ static int map_browser__run(struct map_browser *browser)
 
 	if (ui_browser__show(&browser->b, browser->map->dso->long_name,
 			     "Press ESC to exit, %s / to search",
-			     verbose ? "" : "restart with -v to use") < 0)
+			     verbose > 0 ? "" : "restart with -v to use") < 0)
 		return -1;
 
 	while (1) {
@@ -81,7 +81,7 @@ static int map_browser__run(struct map_browser *browser)
 
 		switch (key) {
 		case '/':
-			if (verbose)
+			if (verbose > 0)
 				map_browser__search(browser);
 		default:
 			break;
@@ -117,7 +117,7 @@ int map__browse(struct map *map)
 
 		if (maxaddr < pos->end)
 			maxaddr = pos->end;
-		if (verbose) {
+		if (verbose > 0) {
 			u32 *idx = symbol__browser_index(pos);
 			*idx = mb.b.nr_entries;
 		}
diff --git a/tools/perf/ui/hist.c b/tools/perf/ui/hist.c
index 18cfcdc90356..5d632dca672a 100644
--- a/tools/perf/ui/hist.c
+++ b/tools/perf/ui/hist.c
@@ -648,7 +648,7 @@ unsigned int hists__sort_list_width(struct hists *hists)
 		ret += fmt->width(fmt, &dummy_hpp, hists);
 	}
 
-	if (verbose && hists__has(hists, sym)) /* Addr + origin */
+	if (verbose > 0 && hists__has(hists, sym)) /* Addr + origin */
 		ret += 3 + BITS_PER_LONG / 4;
 
 	return ret;
diff --git a/tools/perf/util/annotate.c b/tools/perf/util/annotate.c
index 06cc04e5806a..273f21fa32b5 100644
--- a/tools/perf/util/annotate.c
+++ b/tools/perf/util/annotate.c
@@ -1768,7 +1768,7 @@ int symbol__annotate_printf(struct symbol *sym, struct map *map,
 	printf("%-*.*s----\n",
 	       graph_dotted_len, graph_dotted_len, graph_dotted_line);
 
-	if (verbose)
+	if (verbose > 0)
 		symbol__annotate_hits(sym, evsel);
 
 	list_for_each_entry(pos, &notes->src->source, node) {
diff --git a/tools/perf/util/probe-event.c b/tools/perf/util/probe-event.c
index 35f5b7b7715c..28fb62c32678 100644
--- a/tools/perf/util/probe-event.c
+++ b/tools/perf/util/probe-event.c
@@ -594,7 +594,7 @@ static int find_perf_probe_point_from_dwarf(struct probe_trace_point *tp,
 	pr_debug("try to find information at %" PRIx64 " in %s\n", addr,
 		 tp->module ? : "kernel");
 
-	dinfo = debuginfo_cache__open(tp->module, verbose == 0);
+	dinfo = debuginfo_cache__open(tp->module, verbose <= 0);
 	if (dinfo)
 		ret = debuginfo__find_probe_point(dinfo,
 						 (unsigned long)addr, pp);
diff --git a/tools/perf/util/stat.c b/tools/perf/util/stat.c
index 39345c2ddfc2..0d51334a9b46 100644
--- a/tools/perf/util/stat.c
+++ b/tools/perf/util/stat.c
@@ -344,7 +344,7 @@ int perf_stat_process_counter(struct perf_stat_config *config,
 	for (i = 0; i < 3; i++)
 		update_stats(&ps->res_stats[i], count[i]);
 
-	if (verbose) {
+	if (verbose > 0) {
 		fprintf(config->output, "%s: %" PRIu64 " %" PRIu64 " %" PRIu64 "\n",
 			perf_evsel__name(counter), count[0], count[1], count[2]);
 	}

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