linux-kernel - [PATCH 1/2] perf top: Fix top.call-graph works abnormal

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Date:   Mon, 12 Mar 2018 19:25:56 +0800
From:   Yisheng Xie <xieyisheng1@...wei.com>
To:     <acme@...nel.org>
CC:     <jolsa@...hat.com>, <namhyung@...nel.org>,
        <alexander.shishkin@...ux.intel.com>, <mingo@...hat.com>,
        <peterz@...radead.org>, <linux-kernel@...r.kernel.org>,
        Yisheng Xie <xieyisheng1@...wei.com>
Subject: [PATCH 1/2] perf top: Fix top.call-graph works abnormal

When try to add call-graph for top into .perfconfig file, like:

      [top]
            call-graph = fp

find it cannot work for perf_top_config() do not parse this option.

Fix it by call perf_default_config() when config top.call-graph.

Fixes: b8cbb349061e (perf config: Bring perf_default_config to the very beginning at main())
Signed-off-by: Yisheng Xie <xieyisheng1@...wei.com>
---
 tools/perf/builtin-top.c | 6 ++++--
 1 file changed, 4 insertions(+), 2 deletions(-)

diff --git a/tools/perf/builtin-top.c b/tools/perf/builtin-top.c
index 35ac016..fd6e238 100644
--- a/tools/perf/builtin-top.c
+++ b/tools/perf/builtin-top.c
@@ -1224,8 +1224,10 @@ static int __cmd_top(struct perf_top *top)
 
 static int perf_top_config(const char *var, const char *value, void *cb __maybe_unused)
 {
-	if (!strcmp(var, "top.call-graph"))
-		var = "call-graph.record-mode"; /* fall-through */
+	if (!strcmp(var, "top.call-graph")) {
+		var = "call-graph.record-mode";
+		return perf_default_config(var, value, cb);
+	}
 	if (!strcmp(var, "top.children")) {
 		symbol_conf.cumulate_callchain = perf_config_bool(var, value);
 		return 0;
-- 
1.7.12.4