linux-kernel - Re: [PATCH 17/41] perf trace beauty clone: Handle CLONE

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Date:   Wed, 29 May 2019 16:49:16 +0200
From:   Christian Brauner <christian@...uner.io>
To:     Arnaldo Carvalho de Melo <acme@...nel.org>
Cc:     Ingo Molnar <mingo@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Jiri Olsa <jolsa@...nel.org>,
        Namhyung Kim <namhyung@...nel.org>,
        Clark Williams <williams@...hat.com>,
        linux-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org,
        Arnaldo Carvalho de Melo <acme@...hat.com>,
        Adrian Hunter <adrian.hunter@...el.com>,
        Brendan Gregg <brendan.d.gregg@...il.com>,
        Luis Cláudio Gonçalves 
        <lclaudio@...hat.com>
Subject: Re: [PATCH 17/41] perf trace beauty clone: Handle CLONE_PIDFD

On Wed, May 29, 2019 at 10:35:41AM -0300, Arnaldo Carvalho de Melo wrote:
> From: Arnaldo Carvalho de Melo <acme@...hat.com>
> 
> In addition to the older flags. This will allow something like this to
> be implemented in 'perf trace"
> 
>   perf trace -e clone/PIDFD in flags/
> 
> I.e. ask for strace like tracing, system wide, looking for 'clone'
> syscalls that have the CLONE_PIDFD bit set in the 'flags' arg.
> 
> For now we'll just see PIDFD if it is set in the 'flags' arg.
> 
> Cc: Christian Brauner <christian@...uner.io>
> Cc: Adrian Hunter <adrian.hunter@...el.com>
> Cc: Brendan Gregg <brendan.d.gregg@...il.com>
> Cc: Jiri Olsa <jolsa@...nel.org>
> Cc: Luis Cláudio Gonçalves <lclaudio@...hat.com>
> Cc: Namhyung Kim <namhyung@...nel.org>
> Link: https://lkml.kernel.org/n/tip-drq9h7s8gcv8b87064fp6lb0@git.kernel.org
> Signed-off-by: Arnaldo Carvalho de Melo <acme@...hat.com>

Acked-by: Christian Brauner <christian@...uner.io>

> ---
>  tools/perf/trace/beauty/clone.c | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/tools/perf/trace/beauty/clone.c b/tools/perf/trace/beauty/clone.c
> index 6eb9a6636171..1a8d3be2030e 100644
> --- a/tools/perf/trace/beauty/clone.c
> +++ b/tools/perf/trace/beauty/clone.c
> @@ -25,6 +25,7 @@ static size_t clone__scnprintf_flags(unsigned long flags, char *bf, size_t size,
>  	P_FLAG(FS);
>  	P_FLAG(FILES);
>  	P_FLAG(SIGHAND);
> +	P_FLAG(PIDFD);
>  	P_FLAG(PTRACE);
>  	P_FLAG(VFORK);
>  	P_FLAG(PARENT);
> -- 
> 2.20.1
>