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: gnats-bugs%NetBSD.org@localhost
Cc: 
Subject: Re: kern/42228: Kernel deadlock prevents further file system access
Date: Tue, 15 Jun 2010 22:18:15 +0100

 On Sun, Oct 25, 2009 at 02:20:04PM +0000, Manuel Bouyer wrote:
 >  > And I don't understand
 >  >  why that would happen frequently on one of my 24/7 NetBSD 5.0_STABLE
 >  >  systems but not on the other, they both use FFS. Is it e.g. more likely
 >  >  to happen on systems with multiple CPU cores?
 >  
 >  Yes, multiple CPUs will make things worse, as does using WAPBL
 >  (WAPBL is unusable for me on systems using rsync for example).
 
 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. :-(
 
        Kind regards
 
 -- 
 Matthias Scheler                                  http://zhadum.org.uk/