Re: pmap cleanup approach.

[Manuel Bouyer <bouyer%antioche.eu.org@localhost>]

On Sat, Feb 16, 2019 at 03:23:35PM +0530, Cherry G.Mathew wrote:
> [...]
> 
> Finally, as an experiment for later (once PVHVM is stable) I want to
> experiment with removing the idea of 'p2m/m2p' tables in their entirety
> and use the power of our uvm_hotplug(9) infrastructure to directly
> manage 'machine frames', however fragmented they are.

Not only the memory space may be fragmented, but it's dynamic.
This means that an in-use segment could be split in 2, (or more likely 3)
segments. I don't see this functionality in uvm_hotplug(9).

Also I fear that managing m2p updates via UVM makes these operations
much heavier.

-- 
Manuel Bouyer <bouyer%antioche.eu.org@localhost>
     NetBSD: 26 ans d'experience feront toujours la difference
--