linux-kernel - Re: [RFC][ PATCH -tip v2 0/7] kprobes: Kprobes jump optimization support

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Message-ID: <4A415258.6030603@redhat.com>
Date:	Tue, 23 Jun 2009 18:08:24 -0400
From:	Masami Hiramatsu <mhiramat@...hat.com>
To:	Ingo Molnar <mingo@...e.hu>
CC:	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	lkml <linux-kernel@...r.kernel.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Jim Keniston <jkenisto@...ibm.com>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	Christoph Hellwig <hch@...radead.org>,
	Steven Rostedt <rostedt@...dmis.org>,
	Anders Kaseorg <andersk@...lice.com>,
	Tim Abbott <tabbott@...lice.com>,
	systemtap <systemtap@...rces.redhat.com>,
	DLE <dle-develop@...ts.sourceforge.net>
Subject: Re: [RFC][ PATCH -tip v2 0/7] kprobes: Kprobes jump optimization
 support

Masami Hiramatsu wrote:
>> Plus i'd suggest a runtime control (a sysctl) as well - if it's not 
>> too intrusive. Since this is an optional speedup feature, distros 
>> can have this enabled and if there's some problem with it then it 
>> can still be disabled in sysctl.conf, without having to rebuild the 
>> kernel.
> 
> The runtime control is a good idea. Btw, current kprobes already has
> a runtime disable interface under sysfs. Is there any reason that we'd
> better to use sysctl instead of sysfs?

Oops, s/sysfs/debugfs/g.

-- 
Masami Hiramatsu

Software Engineer
Hitachi Computer Products (America), Inc.
Software Solutions Division

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

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