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Date: Wed, 5 Jun 2024 20:08:56 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>, Mark Rutland
 <mark.rutland@arm.com>, Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
 Andrew Morton <akpm@linux-foundation.org>, Alexei Starovoitov
 <alexei.starovoitov@gmail.com>, Florent Revest <revest@chromium.org>,
 Martin KaFai Lau <martin.lau@linux.dev>, bpf <bpf@vger.kernel.org>, Sven
 Schnelle <svens@linux.ibm.com>, Alexei Starovoitov <ast@kernel.org>, Jiri
 Olsa <jolsa@kernel.org>, Arnaldo Carvalho de Melo <acme@kernel.org>, Daniel
 Borkmann <daniel@iogearbox.net>, Alan Maguire <alan.maguire@oracle.com>,
 Peter Zijlstra <peterz@infradead.org>, Thomas Gleixner
 <tglx@linutronix.de>, Guo Ren <guoren@kernel.org>
Subject: Re: [PATCH v3 13/27] function_graph: Add pid tracing back to
 function graph tracer
Message-ID: <20240605200856.04f3ebe5@gandalf.local.home>
In-Reply-To: <20240603190822.991720703@goodmis.org>
References: <20240603190704.663840775@goodmis.org>
	<20240603190822.991720703@goodmis.org>
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On Mon, 03 Jun 2024 15:07:17 -0400
Steven Rostedt <rostedt@goodmis.org> wrote:

> +++ b/kernel/trace/ftrace.c
> @@ -100,7 +100,7 @@ struct ftrace_ops *function_trace_op __read_mostly = &ftrace_list_end;
>  /* What to set function_trace_op to */
>  static struct ftrace_ops *set_function_trace_op;
>  
> -static bool ftrace_pids_enabled(struct ftrace_ops *ops)
> +bool ftrace_pids_enabled(struct ftrace_ops *ops)
>  {
>  	struct trace_array *tr;
>  
> @@ -402,10 +402,11 @@ static void ftrace_update_pid_func(void)
>  		if (op->flags & FTRACE_OPS_FL_PID) {
>  			op->func = ftrace_pids_enabled(op) ?
>  				ftrace_pid_func : op->saved_func;
> -			ftrace_update_trampoline(op);

Bah, this patch accidentally removed the above function and broke pid
tracing. Hmm, not sure why this still passed the tests. Will investigate.

-- Steve

>  		}
>  	} while_for_each_ftrace_op(op);
>  
> +	fgraph_update_pid_func();
> +
>  	update_ftrace_function();
>  }
>