Subject: Re: kern/36669: NetBSD 4.0_BETA2 crashes with "panic: lockmgr: locking against myself"
To: None <kern-bug-people@netbsd.org, gnats-admin@netbsd.org,>
From: Antti Kantee <pooka@cs.hut.fi>
List: netbsd-bugs
Date: 07/22/2007 09:35:01
The following reply was made to PR kern/36669; it has been noted by GNATS.

From: Antti Kantee <pooka@cs.hut.fi>
To: gnats-bugs@NetBSD.org, tron@zhadum.org.uk
Cc: 
Subject: Re: kern/36669: NetBSD 4.0_BETA2 crashes with "panic: lockmgr: locking against myself"
Date: Sun, 22 Jul 2007 12:34:25 +0300

 On Sun Jul 22 2007 at 09:25:01 +0000, Matthias Scheler wrote:
 > The following reply was made to PR kern/36669; it has been noted by GNATS.
 > 
 > From: Matthias Scheler <tron@zhadum.org.uk>
 > To: Antti Kantee <pooka@cs.hut.fi>
 > Cc: gnats-bugs@NetBSD.org
 > Subject: Re: kern/36669: NetBSD 4.0_BETA2 crashes with "panic: lockmgr: locking against myself"
 > Date: Sun, 22 Jul 2007 10:21:31 +0100
 > 
 >  On Sun, Jul 22, 2007 at 02:35:01AM +0300, Antti Kantee wrote:
 >  > Had a discussion about this with David Holland and finally he suggested
 >  > avoiding links to procfs itself.  This shouldn't hurt any real uses
 >  > and makes the panics go away once again.
 >  
 >  The patch doesn't work for me unfortunately.
 >  
 >  I can still panic the system with:
 >  
 >  mkdir /tmp/gaga
 >  echo data >/tmp/gaga/data
 >  grm -rf /tmp/gaga
 
 I can't, with or without -o linux for procfs:
 
 jojonaru# mount
 /dev/wd0a on / type ffs (local)
 tmpfs on /tmp type tmpfs (local)
 procfs on /proc type procfs (local)
 jojonaru# mkdir /tmp/gaga
 jojonaru# echo data >/tmp/gaga/data
 jojonaru# ./grm -rf /tmp/gaga
 jojonaru# 
 
 This is DIAGNOSTIC & DEBUG & LOCKDEBUG.
 
 Can you post a traceback?
 
 -- 
 Antti Kantee <pooka@iki.fi>                     Of course he runs NetBSD
 http://www.iki.fi/pooka/                          http://www.NetBSD.org/
     "la qualité la plus indispensable du cuisinier est l'exactitude"