Re: kern/42228: Kernel deadlock prevents further file system access

[Matthias Scheler <tron%zhadum.org.uk@localhost>]

The following reply was made to PR kern/42228; it has been noted by GNATS.

From: Matthias Scheler <tron%zhadum.org.uk@localhost>
To: NetBSD GNATS <gnats-bugs%NetBSD.org@localhost>
Cc: 
Subject: Re: kern/42228: Kernel deadlock prevents further file system access
Date: Sat, 19 Jun 2010 23:21:40 +0100

 On Tue, Jun 15, 2010 at 09:20:04PM +0000, Matthias Scheler wrote:
 >  I had two deadlocks today. It seems that having a lot of e-mails in
 >  "/var/spool/postfix" (> 3,000 in this case) triggers the problem
 >  quite easily. :-(
 
 Another deadlock today with a NetBSD/amd64 5.1_RC3. I examined
 multiple dozen of the processes which were stuck in "tstile" state.
 Most of them were stuck in open(2), stat(2) or execve(2). I found
 one "httpd" (Apache 2.2.15) process which was stuck in fcntl() trying
 to lock a file (it had called cv_timedwait() from lf_advlock()) but
 I'm not sure whether that was related.
 
 Is there any way I can get more debugging information? How do I e.g.
 find the vnode based on a stack trace?
 
        Kind regards
 
 -- 
 Matthias Scheler                                  http://zhadum.org.uk/