Re: CVS commit: [matt-nb5-mips64] src/sys

[Matt Thomas <matt%3am-software.com@localhost>]

On Jun 4, 2011, at 9:57 AM, Toru Nishimura wrote:

>> Committed By:   matt
>> Date:           Wed May 25 23:58:51 UTC 2011
>> 
>> Modified Files:
>> ...
>> Log Message:
>> Make uvm_map recognize UVM_FLAG_COLORMATCH which tells uvm_map that the
>> 'align' argument specifies the starting color of the KVA range to be 
>> returned.
>> ...
>> Make the socket and pipe loan color-safe.
>> ...
>> Make the mips pmap enforce strict page color (color(VA) == color(PA)).
> 
> Oh, YES!  So, NetBSD is now the world's first "VIPT cache aware" OS, isn't 
> it?  Since
> the introduction of MIPS R4000, OS designers have been in trouble about how 
> to make
> VM VIPT cache coherent.  The answer was simple; make sure to have colour(VA) 
> == colour(PA).

This is still a work in progress.  Right I'm modifying page daemon to treat 
each color as a separate collection of pages with its own free target, color 
hand, etc.