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Message-Id: <200707171948.42054.ak@suse.de>
Date:	Tue, 17 Jul 2007 19:48:41 +0200
From:	Andi Kleen <ak@...e.de>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	john.blackwood@...r.com, linux-kernel@...r.kernel.org,
	Jeremy Fitzhardinge <jeremy@...source.com>,
	Roland McGrath <roland@...hat.com>, bugsy@...r.com,
	Andrew Morton <akpm@...ux-foundation.org>
Subject: Re: [PATCH] Reading the VDSO area - i386

On Tuesday 17 July 2007 18:47:56 Jeremy Fitzhardinge wrote:
> John Blackwood wrote:
> > I was doing some tests that attempt to read the VDSO area of a
> > task through either the /proc/pid/mem or ptrace(PTRACE_PEEKTEXT,
> > ...) interfaces, and it seems that when the CONFIG_COMPAT_VDSO kernel
> > parameter is enabled, we can no longer successfully read the VDSO area
> > on i386 kernels.
> 
> Thanks.  Someone else noticed this recently, and posted a near-identical
> patch.  But I can't seem to find it right now...
> 
> Andrew, Andi: do you remember something like this passing by?

Yes it was from Jan Beulich.

-Andi
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