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

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Message-Id: <20070305225859.236021800E5@magilla.sf.frob.com>
Date:	Mon,  5 Mar 2007 14:58:59 -0800 (PST)
From:	Roland McGrath <roland@...hat.com>
To:	Jeremy Fitzhardinge <jeremy@...p.org>
Cc:	Andi Kleen <ak@...e.de>, Ingo Molnar <mingo@...e.hu>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org,
	Rusty Russell <rusty@...tcorp.com.au>,
	Jan Beulich <jbeulich@...ell.com>
Subject: Re: [patch] paravirt: VDSO page is essential

> Jan Beulich just posted a patch to do just this - relocate the vdso's
> ELF header.  If that's all that's really required to keep COMPAT_VDSO
> viable under PARAVIRT, then it seems like the way to go.

I found http://marc.theaimsgroup.com/?l=xen-devel&m=117309332600075&w=2 and
that must be the one you meant.  The ELF-grokking form of that is exactly
what I had in mind.  The "find relocs with cmp" scheme is pretty silly, but
also works fine.  It trades tweaky ELF knowledge with tweaky fragile build
methods, but it's all about the same to me.  


Thanks,
Roland
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