linux-kernel - Re: [PATCH 3/3] tracing/ksym_tracer: support quick clear for ksym_trace

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Message-ID: <20090722050636.GA9039@in.ibm.com>
Date:	Wed, 22 Jul 2009 10:36:36 +0530
From:	"K.Prasad" <prasad@...ux.vnet.ibm.com>
To:	Xiao Guangrong <xiaoguangrong@...fujitsu.com>
Cc:	Ingo Molnar <mingo@...e.hu>,
	Alan Stern <stern@...land.harvard.edu>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH 3/3] tracing/ksym_tracer: support quick clear for
	ksym_trace_filter

On Wed, Jul 22, 2009 at 11:25:14AM +0800, Xiao Guangrong wrote:
> It's rather bored to clear symbol one by one in ksym_trace_filter
> file, so, this patch can let ksym_trace_filter file support quick
> clear, we can write "0" to this file, it can clear all symbols
> 
> for example:
>  # cat ksym_trace_filter
>  ksym_filter_head:rw-
>  global_trace:rw-
>  # echo 0 > ksym_trace_filter
>  # cat ksym_trace_filter
>  #
>

It's nice to have this feature added and the other patches fix issues in
ksym tracer. Can you have this patch add the capability to clear all
breakpoints in one-shot through wild-cards?

Ingo wanted something like "echo "*:---" > ksym_trace_filter". The patch
I sent here: http://lkml.org/lkml/2009/6/20/73 implements the same. You
may want to implement something on those lines.

Thanks,
K.Prasad

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