linux-kernel - Re: [PATCH v2 0/2] perf: add support for logging debug messages to file

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Date:   Sun, 29 Sep 2019 09:44:07 +0200
From:   Jiri Olsa <jolsa@...hat.com>
To:     Changbin Du <changbin.du@...il.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        Ingo Molnar <mingo@...hat.com>,
        Arnaldo Carvalho de Melo <acme@...nel.org>,
        Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
        Namhyung Kim <namhyung@...nel.org>,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2 0/2] perf: add support for logging debug messages to
 file

On Sun, Sep 22, 2019 at 10:38:21AM +0800, Changbin Du wrote:
> When in TUI mode, it is impossible to show all the debug messages to
> console. This make it hard to debug perf issues using debug messages.
> This patch adds support for logging debug messages to file to resolve
> this problem.
> 
> v2:
>   o specific all debug options one time.
> 
> Changbin Du (2):
>   perf: support multiple debug options separated by ','
>   perf: add support for logging debug messages to file

hi,
getting segfault with:

[jolsa@...va perf]$ ./perf --debug verbose=2,file report
build id event received for [kernel.kallsyms]: bf6ca14c03795fd67b4d88113681ba4af2b8c18a
Segmentation fault (core dumped)

jirka

> 
>  tools/perf/Documentation/perf.txt |  14 ++--
>  tools/perf/util/debug.c           | 106 ++++++++++++++++++------------
>  2 files changed, 73 insertions(+), 47 deletions(-)
> 
> -- 
> 2.20.1
>