kern/104406: [ufs] Processes get stuck in "ufs" state under persistent CPU load

[Kris Kennaway]

Eugene Grosbein wrote:
> On Fri, Oct 19, 2007 at 03:05:01PM -0700, Alfred Perlstein wrote:
> 
>>> Can anyone take a look on PR kern/104406 ? I got repeatable hang situation, 
>>> but I can't obtain a kernel dump to get result of all show commands from 
>>> here:
>>>
>>> http://www.freebsd.org/doc/en_US.ISO8859-1/books/developers-handbook/kerneldebug-deadlocks.html
>>>
>>> After my break to debugger using Ctrl+Alt+Esc sequence and entering a 
>>> "panic" command kernel does not wrote a kernel dump but seems to hang. Can 
>>> anyone describe how to obtain a kernel dump in this situation, or at least 
>>> say - which output of show commands need in first place to debug this ? 
>>> Output of all suggested commands is huge and I afraid of making mistake 
>>> when carrying this output from screen to list of paper and back :-)
> 
> This very easy to reproduce [ufs] uninterruptable deadlock
> for both of RELENG_6 and RELENG_7. Look at this PR:
> http://www.freebsd.org/cgi/query-pr.cgi?pr=kern/107439

No, ufs and ntfs are different things.

> The PR is closed but the problem is still here with 7.0-PRERELEASE
> and, perhaps, CURRENT.

It is closed because you could not be contacted by email for feedback. 
If you are still interested in this PR then you need to rectify that 
problem and then follow up with remko.

Kris