linux-kernel - Re: [PATCH v4 0/13] Uprobes v4

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Message-ID: <20100519174555.GA10508@redhat.com>
Date:	Wed, 19 May 2010 13:45:55 -0400
From:	"Frank Ch. Eigler" <fche@...hat.com>
To:	Srikar Dronamraju <srikar@...ux.vnet.ibm.com>
Cc:	Peter Zijlstra <peterz@...radead.org>,
	Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
	Ingo Molnar <mingo@...e.hu>,
	Masami Hiramatsu <mhiramat@...hat.com>,
	Mel Gorman <mel@....ul.ie>,
	Steven Rostedt <rostedt@...dmis.org>,
	Randy Dunlap <rdunlap@...otime.net>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	"H. Peter Anvin" <hpa@...or.com>,
	Roland McGrath <roland@...hat.com>,
	Christoph Hellwig <hch@...radead.org>,
	Ananth N Mavinakayanahalli <ananth@...ibm.com>,
	Oleg Nesterov <oleg@...hat.com>,
	Mark Wielaard <mjw@...hat.com>,
	LKML <linux-kernel@...r.kernel.org>,
	Jim Keniston <jkenisto@...ux.vnet.ibm.com>,
	Frederic Weisbecker <fweisbec@...il.com>,
	"Rafael J. Wysocki" <rjw@...k.pl>,
	Andrew Morton <akpm@...ux-foundation.org>,
	"Paul E. McKenney" <paulmck@...ux.vnet.ibm.com>
Subject: Re: [PATCH v4 0/13] Uprobes v4

Hi -

On Wed, May 19, 2010 at 11:08:06PM +0530, Srikar Dronamraju wrote:

> [...]  For global tracing we can't use access_process_vm. [...]

Well, we have already demonstrated functional "global tracing" via
access_process_vm, with the trade-off that affected pages are
replicated on a per-process basis.  (KSM could end up sharing them
again, one supposes.)

- FChE
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