[PATCH 6.1 1083/1146] perf debug: Set debug_peo_args and redirect_to_stderr variable to correct values in perf_quiet_option()

[Date Prev][Date Next][Thread Prev][Thread Next][Date Index][Thread Index]

 



From: Yang Jihong <yangjihong1@xxxxxxxxxx>

[ Upstream commit 188ac720d364035008a54d249cf47b4cc100f819 ]

When perf uses quiet mode, perf_quiet_option() sets the 'debug_peo_args'
variable to -1, and display_attr() incorrectly determines the value of
'debug_peo_args'.  As a result, unexpected information is displayed.

Before:

  # perf record --quiet -- ls > /dev/null
  ------------------------------------------------------------
  perf_event_attr:
    size                             128
    { sample_period, sample_freq }   4000
    sample_type                      IP|TID|TIME|PERIOD
    read_format                      ID|LOST
    disabled                         1
    inherit                          1
    mmap                             1
    comm                             1
    freq                             1
    enable_on_exec                   1
    task                             1
    precise_ip                       3
    sample_id_all                    1
    exclude_guest                    1
    mmap2                            1
    comm_exec                        1
    ksymbol                          1
    bpf_event                        1
  ------------------------------------------------------------
  ...

After:
  # perf record --quiet -- ls > /dev/null
  #

redirect_to_stderr is a similar problem.

Fixes: f78eaef0e0493f60 ("perf tools: Allow to force redirect pr_debug to stderr.")
Fixes: ccd26741f5e6bdf2 ("perf tool: Provide an option to print perf_event_open args and return value")
Suggested-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Reviewed-by: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Signed-off-by: Yang Jihong <yangjihong1@xxxxxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Andi Kleen <ak@xxxxxxxxxxxxxxx>
Cc: Carsten Haitzler <carsten.haitzler@xxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Leo Yan <leo.yan@xxxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: martin.lau@xxxxxxxxxx
Cc: Masami Hiramatsu <mhiramat@xxxxxxxxxx>
Cc: Namhyung Kim <namhyung@xxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Ravi Bangoria <ravi.bangoria@xxxxxxx>
Cc: Ravi Bangoria <ravi.bangoria@xxxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20221220035702.188413-2-yangjihong1@xxxxxxxxxx
Signed-off-by: Arnaldo Carvalho de Melo <acme@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/perf/util/debug.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/tools/perf/util/debug.c b/tools/perf/util/debug.c
index 65e6c22f38e4..190e818a0717 100644
--- a/tools/perf/util/debug.c
+++ b/tools/perf/util/debug.c
@@ -241,6 +241,10 @@ int perf_quiet_option(void)
 		opt++;
 	}
 
+	/* For debug variables that are used as bool types, set to 0. */
+	redirect_to_stderr = 0;
+	debug_peo_args = 0;
+
 	return 0;
 }
 
-- 
2.35.1






[Index of Archives]     [Linux Kernel]     [Kernel Development Newbies]     [Linux USB Devel]     [Video for Linux]     [Linux Audio Users]     [Yosemite Hiking]     [Linux Kernel]     [Linux SCSI]

  Powered by Linux