From mboxrd@z Thu Jan  1 00:00:00 1970
From: Ian Campbell <Ian.Campbell@XenSource.com>
Subject: Re: Xen 3.1 - Can't run Fedora Core 1 PV
Date: Thu, 19 Jul 2007 17:49:04 +0100
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To: Nick Craig-Wood <nick@craig-wood.com>
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On Thu, 2007-07-19 at 17:34 +0100, Nick Craig-Wood wrote:
> That fixes the problem.  The original kernel I started with works fine
> with vdso=0 as does the xen 3.1 binary release.

Phew!

> As I understand it vdso enables use of the faster sysenter rather than
> int80 for sys calls.  So disabling it will slow down syscalls slightly
> but otherwise shouldn't matter.  Is that right?

On native yes but under Xen sysenter isn't available so you are using
int80 anyway.

Cheers,
Ian.