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Date:      Wed, 22 May 1996 22:49:03 GMT
From:      James Raynard <fcurrent@jraynard.demon.co.uk>
To:        current@freebsd.org
Cc:        toor@dyson.iquest.net
Subject:   Re: Possible problem with new VM code?
Message-ID:  <199605222249.WAA11686@jraynard.demon.co.uk>

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No core dumps here, (un?)fortunately, but I do get strange behaviour
if I try to start up Emacs after connecting up to my ISP. This has
only started since I started running with the new VM code.

A typical session goes like this:-

1. Dial into ISP using kernel PPP (from a root xterm).
2. As soon as the connection is made, the ISP sets up several SMTP
   channels to my machine (is that the correct term?). This typically
   causes 6-8 copies of sendmail to run simultaneously, accompanied by
   a good deal of forking.
3. My dial script also kicks off slurp. This is a passive NNTP client 
   which requests and downloads news articles simultaneously.
4. I also usually FTP the latest CTM files for cvs-current.
5. When slurp has finished, I run 'rnews -U' to unbatch the articles
   it has collected.
6. When all my mail has arrived, I close the PPP connection and switch
   to another virtual window (this is under fvwm).
7. I then do 'telnet localhost', log in as one of my pseudo-users and
   do 'emacs &'.

At this point, strange things can happen. Occasionally emacs will
appear to start, but then print out a bogus error message and refuse
to do anything. Sometimes it doesn't start, but spews out a load of
byte code on the xterm, or an infinite stream of error messages. Once,
nothing at all appeared to happen! (And sometimes it works normally).

According to top, I always have over 20MB of swap available when this
happens and about 9 or 10M of RAM, and everything else appears to be
working normally. I don't usually have many applications running -
just a few xterms open.

However, emacs is using a massive amount of CPU time, and I have to
kill it from another xterm. Once I've killed it, it'll start again
with no problems.

This may possibly be an emacs problem (it's the -release port,
compiled under -release; I'll try re-compiling it), or it may be
because I'm slightly low on swap (I have 24MB RAM and 64MB swap). But
I thought it might be worth mentioning.

-- 
James Raynard, Edinburgh, Scotland
jraynard@dial.pipex.com
james@jraynard.demon.co.uk



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