Processes get stuck in "ufs" state

Wed Mar 7 03:05:02 UTC 2007

On Wed, Mar 07, 2007 at 05:22:38AM +0300, Oleg Derevenetz wrote:
> Hi !
> 
> Sometimes (once a week approximately) I have a problem with the same 
> symptoms described here on SMP FreeBSD 6.2-STABLE with dual AMD Opteron(tm) 
> Processor 850:
> 
> http://www.freebsd.org/cgi/query-pr.cgi?pr=104406&cat=
> 
> Sometimes (apparently when CPU load suddenly goes up) all processes that 
> interacts with disk gets stuck in "ufs" state, but in my case 
> SIGSTOP/SIGCONT seemingly does not help.
See developer handbook, Deadlock Debugging chapter for instruction what
information shall be gathered to debug the problem.
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