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

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Message-ID: <4B545146.3080001@redhat.com>
Date:	Mon, 18 Jan 2010 14:17:10 +0200
From:	Avi Kivity <avi@...hat.com>
To:	Pekka Enberg <penberg@...helsinki.fi>
CC:	Peter Zijlstra <peterz@...radead.org>, ananth@...ibm.com,
	Jim Keniston <jkenisto@...ibm.com>,
	Srikar Dronamraju <srikar@...ux.vnet.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 01/18/2010 02:13 PM, Pekka Enberg wrote:
> So how big chunks of the address space are we talking here for uprobes?
>    

That's for the authors to answer, but at a guess, 32 bytes per probe 
(largest x86 instruction is 15 bytes), so 32 MB will give you a million 
probes.  That's a piece of cake for x86-64, probably harder to justify 
for i386.

-- 
error compiling committee.c: too many arguments to function

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