From owner-freebsd-current  Mon Feb 22 19:43:12 1999
Delivered-To: freebsd-current@freebsd.org
Received: from janus.syracuse.net (janus.syracuse.net [205.232.47.15])
	by hub.freebsd.org (Postfix) with ESMTP id 8891811052
	for <freebsd-current@FreeBSD.ORG>; Mon, 22 Feb 1999 19:43:08 -0800 (PST)
	(envelope-from green@unixhelp.org)
Received: from localhost (green@localhost)
	by janus.syracuse.net (8.8.8/8.8.7) with ESMTP id WAA01964;
	Mon, 22 Feb 1999 22:43:12 -0500 (EST)
Date: Mon, 22 Feb 1999 22:43:12 -0500 (EST)
From: Brian Feldman <green@unixhelp.org>
X-Sender: green@janus.syracuse.net
To: "Alexander N. Kabaev" <kan@sti.cz>
Cc: freebsd-current@FreeBSD.ORG
Subject: Re: Filesystem deadlock
In-Reply-To: <36D1898A.6D9C7B44@sti.cz>
Message-ID: <Pine.BSF.4.05.9902222238440.1759-100000@janus.syracuse.net>
MIME-Version: 1.0
Content-Type: TEXT/PLAIN; charset=US-ASCII
Sender: owner-freebsd-current@FreeBSD.ORG
Precedence: bulk
X-Loop: FreeBSD.ORG

On Mon, 22 Feb 1999, Alexander N. Kabaev wrote:

> The following script reliably causes FreeBSD 4.0-CURRENT (and 3.1-STABLE
> as of today) to lookup. Shortly after this script is started, all disk activity
> 
> stops and any attempt to create new process causes system to freese. While in DDB, ps command
> 
> shows, that all ten fgrep processes are sleeping on inode, all xargs are in waitpid and
> 
> all sh processes are in wait.

You forget about all the processes (just a few, actually) stuck in "kmaw"
(kmem_alloc_wait). This is definitely reproducible :( Should be simple for
someone more knowledgeable to diagnose, as it looks to be a straight
vm/vfs(ufs/ffs) interaction.

> 
> Unfortunately, I cannot run -g kernel on my box
> at this time, so amount of useful information I can provide is pretty much
> limited :(
> 
> #!/bin/sh
> for j in 1 2 3 4 5 6 7 8 9 10; do
>   echo -n $i $j
>     nohup sh -c 'while :; do find /usr -type f | xargs fgrep zukabuka;
> done' \
>               >/dev/null 2>&1 &
>     echo
> done
> 
> 
> 
> 
> 
> To Unsubscribe: send mail to majordomo@FreeBSD.org
> with "unsubscribe freebsd-current" in the body of the message
> 

 Brian Feldman					  _ __  ___ ___ ___  
 green@unixhelp.org			      _ __ ___ | _ ) __|   \ 
	     http://www.freebsd.org/	 _ __ ___ ____ | _ \__ \ |) |
 FreeBSD: The Power to Serve!	   _ __ ___ ____ _____ |___/___/___/ 



To Unsubscribe: send mail to majordomo@FreeBSD.org
with "unsubscribe freebsd-current" in the body of the message