Processes in "ufs" state (PR kern/104406)

[Peter Holm]

On Sun, Oct 15, 2006 at 01:11:52PM -0400, Kris Kennaway wrote:
> On Sun, Oct 15, 2006 at 12:35:11PM +0400, Sergey Zaharchenko wrote:
> > Hello list!
> > 
> > I've stumbled across this (probable) bug when doing some
> > number-crunching. Processes which try to access the filesystem hang at
> > some point when another process has been gobbling up CPU time for a
> > sufficiently long time. Interestingly, processes which have already
> > opened some files before the `hang' can apparently read/write them
> > without hindrance (iostat shows some disk activity). Interactive
> > processes run well too. When the number-cruncher is `kill -STOP'ped and
> > `kill -CONT'ed, everything runs well for another while. It's reliably
> > and frequently reproducible here both on recent and late August CURRENT,
> > the kernel is GENERIC, the hardware is basic (no RAID, etc.).
> > 
> > Could anyone experienced enough try to look into this and/or give advice
> > for debugging the problem? I have ddb available, but I'm not sure about
> > where to look.
> > 
> > http://www.freebsd.org/cgi/query-pr.cgi?pr=104406
> 
> I'm unable to reproduce so far.
> 
> Kris

Same here.

-- 
Peter Holm