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Re: CVS commit: src/sys/uvm
Masao Uebayashi <uebayasi%tombi.co.jp@localhost> responds as;
The VIPT rule is simple; just make sure to match colour between
VPN and PFN.
Hmmm. I've thought that the page colouring constraint is *should*,
Colour match between VPN and PFN is *must*
If not obeying the rule, it's possible two or more cache index is
selected for given a physical address.
Consider the reason why VIPT alias issue vanishes when
PAGE_SIZE is increased. It would make the number of
colour into one _by_matching_ low order bits (= colour
selector field) of VPN and PFN.
Toru Nishimura / ALKYL Technology
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