Subject: Re: disk caching
To: None <email@example.com>
From: R. C. Dowdeswell <firstname.lastname@example.org>
Date: 04/14/2000 10:03:02
On 955730917 seconds since the Beginning of the UNIX epoch
Jason R Thorpe wrote:
>On Fri, Apr 14, 2000 at 12:42:22PM -0400, Thor Lancelot Simon wrote:
> > Real interval periodic update would fix the only real problem with what we
> > have. How to do it with UBC is the question.
>Do this as part of the regular pagedaemon scan? Keep a running average
>of how long it takes to scan the queues, and judge how long a page has
>been there by its position in the queue?
>Just a brainstorm...
How about structuring the queue such that it can have markers in
it and put a marker in every n seconds. Then you know within n
seconds how long something has been in the queue. Other markers
could be events with callbacks, so a thread could be notified after
a certain amount of the queue has been flushed. (this has been
badly worded, I hope the idea came across. :)
== Roland Dowdeswell http://www.Imrryr.ORG/~elric/ ==
== The Unofficial NetBSD Web Pages http://www.Imrryr.ORG/NetBSD/ ==
== The NetBSD Project http://www.NetBSD.ORG/ ==