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From: Andi Kleen <ak@suse.de>
Organization: SUSE Linux Products GmbH, Nuernberg, GF: Markus Rex, HRB 16746 (AG Nuernberg)
To: Jeremy Fitzhardinge <jeremy@goop.org>
Subject: Re: preempt bug in set_pmd_pfn?
Date: Wed, 5 Mar 2008 01:16:45 +0100
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Cc: Ingo Molnar <mingo@elte.hu>, "H. Peter Anvin" <hpa@zytor.com>,
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On Wednesday 05 March 2008 01:07:11 Jeremy Fitzhardinge wrote:
> Andi Kleen wrote:
> >> Won't this leave a stale tlb on the old processor?
> >>     
> >
> > __set_fixmap should be only used in early boot, so it's always
> > on CPU 0
> 
> vdso32-setup.c:map_compat_vdso() uses it to create the compat vdso 
> mapping, which typically happens on the first execve(),

First execve for 32bit binaries?

Anyways __set_fixmap is __init and at the first  execve (unless you have initramfs) 
init.text should be already freed.

-Andi