Strange behavior of r239228 on i386 -- looks like livelocks

Hello, Current.

  It  looks  like  I've got live lock on my router. It acts as router,
but physical console (serial one) and ssh connection are stalled and
don't react on keypresses. After two or three minutes everything
unfreeze, then freeze again...

 After unfreeze here are messages from "nut" that connection with UPS
is lost (UPS is connected to other host in network) and
re-established.

 I don't understand how to debug such situation :)

uname -a is:
FreeBSD gateway.home.serebryakov.spb.ru 10.0-CURRENT FreeBSD 10.0-CURRENT #1 r239228: Mon Aug 13 13:07:52 MSK 2012     root@vmware-c-32.home.serebryakov.spb.ru:/usr/obj/nanobsd.gateway-net5501/data/src/sys/NET5501  i386

Scheduler is ULE.

-- 
// Black Lion AKA Lev Serebryakov <lev@FreeBSD.org>

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