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Re: [Xen-devel] problem with SMP machine

To: Lars Rasmusson <Lars.Rasmusson@xxxxxx>
Subject: Re: [Xen-devel] problem with SMP machine
From: Keir Fraser <Keir.Fraser@xxxxxxxxxxxx>
Date: Wed, 27 Apr 2005 09:19:31 +0100
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On 27 Apr 2005, at 00:49, Lars Rasmusson wrote:

1) Xen thinks that there is something wrong, while there in fact isn't.
2)  Linux does some magic to handle this, that Xen currently does not.
3)  Linux is erroneously ignoring this error.

Any ideas on how to solve this?

It's unlikely that it has to anything to do with MTRR setup -- that message is just a warning. Linux doesn't give it because you probably did not compile in the MTRR driver.

Your best bet is to post the output from booting Xen (a debug build) and from booting plain Linux. Also you might want to add tracing around smpboot.c in particular to work out wher ethe seocndary CPUs are getting dropped.

 -- Keir


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