questions about VM_KMEM_SIZE_SCALE

[Jay Kuri]

Hi there,

Can anyone shed some light on the implications of adjusting
VM_KMEM_SIZE_SCALE?  In particular I'm wondering if I increase this to,
say, 2, what happens?  I must admit I don't know how KVA is different from
KVM or total RAM... so the note in kern_malloc ("on an x86 with 256M KVA,
try to keep VM_KMEM_SIZE_MAX at 80M or below") doesn't shed enough light
on the matter.  What are the implications of VM_KMEM_SIZE getting large?

Does changing this affect memory available to user programs if it's unused
by the kernel?  

Thanks for any assistance,

Jay




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Nothing fails like success because you do not learn 
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is failure. Success only confirms our superstitions.

        Jay Kuri	 jay at oneway.com