Subject: Re: swapfs and uvm.
To: Chuck Silvers <chuq@chuq.com>
From: R. C. Dowdeswell <elric@mabelode.imrryr.org>
List: tech-kern
Date: 03/15/2000 12:42:50
On 953134286 seconds since the Beginning of the UNIX epoch
Chuck Silvers wrote:
>
>I did say "enhance FFS this way (and also to call some device hook
>when it frees a block)". the idea being that FFS can easily inform the
>underlying device when it's no longer using a given block. real devices
>will ignore this information and this virtual swap-backed device will
>convert the page(s) back into zero-fill memory. (this would work best
>if the blocksize was at least as big as the page size, but you'd really
>want that anyway so you could eventually do uvm loanout on the pages
>when applications read() files).
>
>-Chuck
Oh, yes you did. Sorry that I missed that. I guess it serves me
right for replying at 2:30am right before bed. :-)
== Roland Dowdeswell http://www.Imrryr.ORG/~elric/ ==
== The Unofficial NetBSD Web Pages http://www.Imrryr.ORG/NetBSD/ ==
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