On Sun, 29 Jul 2007 13:43:50 +0900
Izumi Tsutsui <tsutsui@ceres.dti.ne.jp> wrote:

> I've upgrade a kernel on my server (i386) from 4.99.20 (around June 20)
> to yesterday's 4.99.25, but after that ypserv(8) (both old 4.99.20
> and new 4.99.25 binaries) seems to stop working.
> 
> ypserv(8) is started via rc.d(8) normally, but it doesn't
> respond any requests from ypbind(8) even from localhost.
> ypserv -l (logging requests) option just says
> "domain_nonack_2: request from localhost, domain foo, served TRUE"
> 
> Does anyone see the similar problem?

I see various problems, like for example rarpd(8) stalls sometimes.
Are you running ntpd? For me, the problems go away for the most
part if i disable ntpd.

Also top/ps/w sometimes cause a panic due to some uvm spinlock held.
(Complete backtrace available on request.)