linux-kernel - Re: [patch] paravirt: VDSO page is essential

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Message-ID: <20070305134854.GA31542@elte.hu>
Date:	Mon, 5 Mar 2007 14:48:54 +0100
From:	Ingo Molnar <mingo@...e.hu>
To:	Andi Kleen <ak@...e.de>
Cc:	Avi Kivity <avi@...ranet.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, Roland McGrath <roland@...hat.com>,
	Rusty Russell <rusty@...tcorp.com.au>
Subject: Re: [patch] paravirt: VDSO page is essential


* Andi Kleen <ak@...e.de> wrote:

> The problem is not the syscall instruction, but some problem with the 
> way the vDSO mapping is set up with CONFIG_PARAVIRT that broke older 
> glibc.

the problem is that CONFIG_PARAVIRT silently turns off 
CONFIG_COMPAT_VDSO, which of course breaks 'old' glibc. This too is a 
must-have fix for v2.6.21.

	Ingo
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