linux-kernel - Re: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP)

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Message-ID: <1263819910.4283.478.camel@laptop>
Date:	Mon, 18 Jan 2010 14:05:10 +0100
From:	Peter Zijlstra <peterz@...radead.org>
To:	Avi Kivity <avi@...hat.com>
Cc:	Pekka Enberg <penberg@...helsinki.fi>,
	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>,
	ananth@...ibm.com, Jim Keniston <jkenisto@...ibm.com>,
	Ingo Molnar <mingo@...e.hu>,
	Arnaldo Carvalho de Melo <acme@...radead.org>,
	utrace-devel <utrace-devel@...hat.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Maneesh Soni <maneesh@...ibm.com>,
	Mark Wielaard <mjw@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: [RFC] [PATCH 1/7] User Space Breakpoint Assistance Layer (UBP)

On Mon, 2010-01-18 at 14:53 +0200, Avi Kivity wrote:
> On 01/18/2010 02:51 PM, Pekka Enberg wrote:
> >
> > And how many probes do we expected to be live at the same time in
> > real-world scenarios? I guess Avi's "one million" is more than enough?
> >    
> 
> I don't think a user will ever come close to a million, but we can 
> expect some inflation from inlined functions (I don't know if uprobes 
> replicates such probes, but if it doesn't, it should).

That's up to the userspace creating the probes but yes, agreed.

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