linux-kernel - Re: [PATCH v3 2.6.39-rc1-tip 18/26] 18: uprobes: commonly used filters.

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Message-ID: <20110421114936.GF10698@linux.vnet.ibm.com>
Date:	Thu, 21 Apr 2011 17:19:36 +0530
From:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
To:	Peter Zijlstra <peterz@...radead.org>
Cc:	Ingo Molnar <mingo@...e.hu>, Steven Rostedt <rostedt@...dmis.org>,
	Linux-mm <linux-mm@...ck.org>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	Jonathan Corbet <corbet@....net>,
	Christoph Hellwig <hch@...radead.org>,
	Masami Hiramatsu <masami.hiramatsu.pt@...achi.com>,
	Thomas Gleixner <tglx@...utronix.de>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	SystemTap <systemtap@...rces.redhat.com>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Roland McGrath <roland@...k.frob.com>,
	Andi Kleen <andi@...stfloor.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH v3 2.6.39-rc1-tip 18/26] 18: uprobes: commonly used
 filters.

* Peter Zijlstra <peterz@...radead.org> [2011-04-21 13:37:15]:

> On Thu, 2011-04-21 at 16:39 +0530, Srikar Dronamraju wrote:
> > > What you want is to save the pid-namespace of the task creating the
> > > filter in your uprobe_simple_consumer and use that to obtain the task's
> > > pid for matching with the provided number.
> > > 
> > 
> > Okay, will do by adding the pid-namespace of the task creating the
> > filter in the uprobe_simple_consumer. 
> 
> Maybe you could convert to the global pid namespace on construction and
> always use that for comparison.
> 
> That would avoid the namespace muck on comparison.. 
> 

Yeah, this idea also seems feasible.

-- 
Thanks and Regards
Srikar
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