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Re: enforcing page color matches
What happens if loaning is done?
On Wed, May 25, 2011 at 4:36 PM, Matt Thomas <matt%3am-software.com@localhost>
> I modified the mips pmap to drop into ddb if there was an attempt to map a
> page with an incorrect page color (color(VA) != color(PA)). Then using
> UVMHIST I fixed each cause. I can now boot a kernel on my matt-nb5-mips64
> branch into sysinst with no bad color matches. I'm sure I haven't found all
> the cases but it's a big step forward.
> The diffs are relatively minor and are at
> www.netbsd.org/~matt/uvm-color-diffs.txt for your viewing enjoyment.
> I'm using a MIPS 74K which needs strict page-coloring enforcement (4 colors
> for its Icache and 2 colors for its Dcache) so this is important to me. If
> this can be enforced, the code to deal with bad colors can be removed and
> that will greatly simplify the mips pmap code.
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