linux-kernel - Re: [PATCH 05/13] ftrace: Call trace_parser

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Date:	Wed, 09 Dec 2009 00:52:00 -0500
From:	Steven Rostedt <rostedt@...dmis.org>
To:	Li Zefan <lizf@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 05/13] ftrace: Call trace_parser_clear() properly

On Tue, 2009-12-08 at 11:15 +0800, Li Zefan wrote:
> I found a weird behavior:
> 
>   # echo 'fuse:*' > set_ftrace_filter
>   bash: echo: write error: Invalid argument
>   # cat set_ftrace_filter
>   fuse_dev_fasync
>   fuse_dev_poll
>   fuse_copy_do
> 
> We should call trace_parser_clear() no matter ftrace_process_regex()
> returns 0 or -errno.

This confused me at first. I applied this patch and I saw that I still
got the warning, but the functions did not got through. Then I realized
that there was no ":mod:" in that filtering.

Yeah, that was a weird side effect. Good catch!

-- Steve


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