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RE: [Xen-devel] Re: Reproducable data corruption on xen-unstable

To: "Robin Green" <greenrd@xxxxxxxxxxxxx>
Subject: RE: [Xen-devel] Re: Reproducable data corruption on xen-unstable
From: "Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>
Date: Sat, 5 Feb 2005 17:47:13 -0000
Cc: "Rik van Riel" <riel@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxxx>, <ian.pratt@xxxxxxxxxxxx>
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Thread-topic: [Xen-devel] Re: Reproducable data corruption on xen-unstable
> On the assumption that this _is_ an FP save/restore bug, I 
> was trying to 
> find the FP save/restore code in the xen-patched kernel.

It's likely to be quite specific to either your CPU, or other hardware
drivers. If it was a general problem it would almost certainly have been
spotted by someone else.

What happens if you run two copies of fptest in parallel on the text
console? This would fail if it was a general fpsave/restore bug. Your
problem seems to be quite specific to also having the framebuffer
active. What kernel modules is your X server using?

Ian


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