https://bugzilla.novell.com/show_bug.cgi?id=413842
User jbeulich@novell.com added comment
https://bugzilla.novell.com/show_bug.cgi?id=413842#c32
--- Comment #32 from Jan Beulich 2008-08-21 01:38:31 MDT ---
This confirms that the range in question (128k @ FC6E0000) is uncachable in the
MTRRs (and that there's no difference between native and Xen), and hence no
matter what software does data from that range should never make it into the
caches. As stated before, clflush should therefore be a no-op on virtual
address ranges mapping this bus address range.
Btw., I take it that it's a single system you own, and hence there's no way to
state whether the issue would be present on two similar/identical systems?
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