Re: processes stuck in vmo_de state

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Hi,

It looks like there is a regression (or a regression that gets exposed
by some new feature) that is related to time-keeping or timecounter,
although I'm not yet familiar with the related code to tell if my
conclusion was right or not.

The problem I observed is that when system boots up, it sometimes
hangs and pressing ^T on console tells me that sleep(1) is running
with 0 second out of 1 second, but the 'real' part of the output is
smaller than 1 or sometimes negative.

For some reason the console may stop giving any output, but trapping
into debugger would unblock it sometimes.

When sh(1) stuck in 'vmo_de' state, it would never recover from that
and a hard reset is necessary.

It seems that commenting hint.apic.0.clock=0 from my loader.conf would
mitigate the issue by the way.  I'll let the system sit there and do a
full universe build, etc. for a while and check it tomorrow.

Cheers,
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