7.1-STABLE does not boot after recent superpage support MFC

[Michael Butler]

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John Baldwin wrote:
> On Friday 27 February 2009 8:08:30 am Igor Sysoev wrote:
>
>> And the message is cycled. The kernel does not boot despite
>> vm.pmap.pg_ps_enabled value.
> 
> This should now be fixed, apologies for the breakage. :(

What are the benefits and/or impacts of enabling this?

Is there anything to be gained with respect to cache and/or TLB
utilization in allowing entry promotion through a reduced "footprint" or
similar? How much does this depend on architecture, say, e.g. Core-2 Duo
vs. Pentium?

I note that it is not enabled by default in -current either - just curious,

	Michael



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