Re: pageable page tables

Rik van Riel (H.H.vanRiel@fys.ruu.nl)
Mon, 8 Dec 1997 12:21:35 +0100 (MET)


On Thu, 4 Dec 1997, Rauli Ruohonen wrote:

> In voimax.lists.linux-kernel, Rik van Riel wrote:
> >That's not the point, as long as page-tables can't be swapped
> >out, they will take up memory. Users sometimes have a memory
>
> If page-table swapping is implemented, what will happen to mlock():ed pages?
> Will the appropriate page tables be locked, too? I certainly hope so.. :)

Hmmm, quite a lot of loopholes with page-table swapping :(
Oh, and I've just calculated that a 4G mmap on /dev/zero will
take about 4megs of unswappable memory... Is pt swapping
worth it or not???

Other area's of vm-improvement are more important anyways...
(more graceful out-of-VM handling, better swapin-code (M)Ingo
had something?)

Rik.

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