> > a concern is kva fragmentation.
> 
> I'm not a VM expert, but "kva fragmentation" reminds me
> STE shortage on 68040 and sun3x pmaps...
> ---
> Izumi Tsutsui

i'm not sure what's "STE shortage".  can you explain with MI terms? :-)

i don't think my patch makes kva fragmentation much worse.
my concern is, it can be sufferred from fragmentation.
ie. it assumes, if we have enough reclaimable kva regions,
freeing them yields some free kva at vm_map layer.  it isn't true if
kva is fragmented much, given "slab" layers between.

now, as i don't think it's more problematic than the current situation,
i'll just go ahead unless anyone objects.

YAMAMOTO Takashi