vmstat 'b' (disk busy?) field keeps climbing ...

[Kostik Belousov]

On Mon, Jun 26, 2006 at 02:20:12AM -0300, Marc G. Fournier wrote:
> On Mon, 26 Jun 2006, Kostik Belousov wrote:
> 
> >Yes, this looks like a deadlock. As I understand, that's on 6.1-STABLE ?
> 
> Yes, kernel sources, it seems, from May 25th, according to my /usr/src 
> tree ...
> 
> >BTW, do you use snapshots ?
> 
> Not that I've explicitly enabled ...
> 
> >I think that without ddb access, diagnose and debug the problem would be 
> >quite hard.
> 
> Would it be a simple matter of:
> 
> CTL-ALT-ESC
> panic
> 
> to get it to dump core?  Or would more be involved?  Would a core dump 
> even work?
Core dumps are somewhat unconvenient in this situation. Better,
sending report to me, follow my advise in
http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html
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