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To: Alan Cox <alan@lxorguk.ukuu.org.uk>
Cc: linux-kernel@vger.kernel.org
Subject: Re: scheduler went mad? 
In-Reply-To: Your message of "Thu, 12 Apr 2001 16:12:55 BST."
             <E14nimI-0000oY-00@the-village.bc.nu> 
From: Valdis.Kletnieks@vt.edu
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On Thu, 12 Apr 2001 16:12:55 BST, Alan Cox said:

> Do you have > 800Mb of RAM ?

Following up - it just bit again (twice)

The first time, it was xmms/kswapd fighting for CPU, and xmms was again immune
to kill -9.  Interestingly enough, several minutes later, I closed 'netscape',
and xmms took the kill within a second or two.

10 minutes later, and another 2 programs that do audio got
wedged up. Oddly enough, I did an 'su', and they broke loose immediately.

I've ruled out i810_audio.c as a culprit - although I have programs that
do audio hanging, *those* programs are always writing their data down
a Unix socket to the actual process that writes to /dev/audio/dsp.
Hmm.. 'su' writes to syslog, and netscape has a few Unix sockets too.
Could the problem be related to running out of some resource related
to Unix-domain sockets, which clears up once some socket is closed?

Oddly enough, while I had 2 programs doing audio wedged, I was still
seeing (hearing actually ;) *new* processes open a connection to esd
and play sounds.  Weird.  


-- 
				Valdis Kletnieks
				Operating Systems Analyst
				Virginia Tech




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