XEN 5.5.0 and clflush

[Kostik Belousov]

On Tue, Sep 22, 2009 at 09:59:14AM -0400, Larry Baird wrote:
> Kostik,
> 
> > I am sorry for delay in answering, you may use this temporal patch until
> > the issue is resolved somehow.
> > 
> > I think I will have to disable CLFLUSH support for intel CPUs when self-snoop
> > is not reported.
> Thanks for the feedback?  Have you heard about this being a problem on
> platforms other than XEN?
No, and AMD should have CPUs without self-snoop, but supporting CLFLUSH.
This is the main reason for this optimization came in, and no single complain
from this problem on AMD (i.e. on native CPU, not under the hypervisor).

> I am not sure how many FreeBSD users are using
> XEN.  If this is a large base, getting a fix in before FreeBSD 8 is
> released would be nice. (-:
> 
> Larry
> 
> 
> -- 
> ------------------------------------------------------------------------
> Larry Baird                        | http://www.gta.com
> Global Technology Associates, Inc. | Orlando, FL
> Email: lab at gta.com                 | TEL 407-380-0220, FAX 407-380-6080
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