*BSD News Article 11493


Return to BSD News archive

Received: by minnie.vk1xwt.ampr.org with NNTP
	id AA1679 ; Tue, 23 Feb 93 14:53:14 EST
Path: sserve!manuel.anu.edu.au!munnari.oz.au!news.Hawaii.Edu!ames!agate!howland.reston.ans.net!bogus.sura.net!udel!sbcs.sunysb.edu!stark.UUCP!gene
From: gene@stark.uucp (Gene Stark)
Newsgroups: comp.os.386bsd.misc
Subject: Re: A comment on 0.1 + 0.2.1 patchkit's stability
Followup-To: comp.os.386bsd.misc
Date: 18 Feb 93 17:15:00
Organization: Gene Stark's home system
Lines: 23
Message-ID: <GENE.93Feb18171500@stark.stark.uucp>
References: <CGD.93Feb17150814@gaia.CS.Berkeley.EDU>
NNTP-Posting-Host: stark.uucp
In-reply-to: cgd@gaia.CS.Berkeley.EDU's message of 17 Feb 93 15:08:14

Chris Demetriou writes:

>under the 0.2.1 patchkit, that'll run at least 3 or 4 times
>straight thru (killed it myself, after that; each "make -k"
>takes abour 1 hour 50 min on my machine)...

I was wondering if others were seeing this type of problem.  I have noticed
that if a process allocates a large amount of memory so that its RSS is
increased, then those page frames seem to become permanently attached to
that process, even once they leave the RSS.  For example, try starting
Emacs and reading in a couple of MB.  Then kill the buffer with the stuff
in it and wait for things to settle down.  You will see Emacs with a low
RSS, but active processes do not get the page frames that Emacs once had.

I haven't yet studied the VM code, so I didn't try to find this.  Also,
I wondered if it would be  a waste of time, since the word on the net seemed
to be that the Jolitz's were revamping the VM code for 0.2.  Does anybody
already familiar with this part of the system know where to look for this
problem?

							- Gene Stark
--
							stark@cs.sunysb.edu