linux-kernel - Re: [PATCH -tip 1/5] [CLEANUP] kprobes: Remove redundant text

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Date:	Tue, 11 May 2010 16:06:53 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>
CC:	Ingo Molnar <mingo@...e.hu>, lkml <linux-kernel@...r.kernel.org>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Jason Baron <jbaron@...hat.com>
Subject: Re: [PATCH -tip 1/5] [CLEANUP] kprobes: Remove redundant	text_mutex
 lock in optimize

Hi Mathieu,

Mathieu Desnoyers wrote:
> * Masami Hiramatsu (mhiramat@...hat.com) wrote:
>> Remove text_mutex locking in optimize_all_kprobes, because
>> that function doesn't modify text but just order optimization
>> to worker.
> 
> Hi Masami,
> 
> A few comments:
> 
> 1) optimize_all_kprobes/unoptimize_all_kprobes should have comments saying that
> they are always called with kprobe_mutex held.
> 
> 2) The sentence above in the changelog could be changed into:
> 
>  ..."because this function doesn't modify text. It simply queues optimizations
> for the kprobe_optimizer worker thread."
> 
> 3)
> 
> static DEFINE_MUTEX(kprobe_mutex);      /* Protects kprobe_table */
> 
> .. should also state that it protects optimizing_list.
> 

Thanks! all comments are good to me!

Thank you again,




-- 
Masami Hiramatsu
e-mail: mhiramat@...hat.com

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