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Re: [Xen-devel] xen trouble while guest excute float app

To: ywzheng <ywzheng@xxxxxxxxxxxxxxxx>
Subject: Re: [Xen-devel] xen trouble while guest excute float app
From: Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Date: Mon, 6 Sep 2010 11:32:54 +0100
Cc: xen-devel <xen-devel@xxxxxxxxxxxxxxxxxxx>
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At 02:51 +0100 on 06 Sep (1283741502), ywzheng wrote:
> When I use ?xm migrate ?live win1 hosta?, (hosta is the same computer), 
> sometime print f = -1.#IND0, sometime goto BUG(). Why()?
> Then I use xen-4.0.1-rc6, the same thing happen. Is this a BUG of xen?

Yes, this bug was introduced by Intel's patches to support XSAVE, which
broke save/restore.  Unfortunately it was only fixed very recently so
it's not fixed in 4.0.1; you'll need the very latest 4.0-testing Xen.



> My CPU is Intel Xeon L5408.When I use other CPU, for example Xeon L5420,I 
> rarely meet the problem.
> 2010-09-06
> ________________________________
> ywzheng

Tim Deegan <Tim.Deegan@xxxxxxxxxx>
Principal Software Engineer, XenServer Engineering
Citrix Systems UK Ltd.  (Company #02937203, SL9 0BG)

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