well the code is just being overly conservative, and the message is
right: the kernel does not support PAT on that hw. Yet.
Please send us a patch and test whether it's working on your box? That's
how the PAT code evolved: it initially was only enabled on a very small
subset of CPUs. We can enable it on more CPUs if people test it.
To be conservative, please make the code emit a printk that this is PAT
on not fully-working hw platform (only 4 PAT entries work). If there
_is_ some erratum on that CPU affecting PAT reliability down the line,
we at least want to have some clue in the syslog.
Ingo
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