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Date:      Sun, 05 Apr 1998 14:35:30 +0800
From:      Peter Wemm <peter@netplex.com.au>
To:        smp@FreeBSD.ORG
Subject:   beware! -current under SMP is "not looking good".
Message-ID:  <199804050635.OAA06176@spinner.netplex.com.au>

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The latest time commit has busted -current under SMP.  I'm not sure of the 
exact circumstances, but it causes a hang when ntpdate is run.  The process
sits in the "running" state but doesn't gain any cpu time.  Trying to break
into DDB causes a deadlock.

The code just prior to this was also broken.  select() wasn't working 
properly, although there is evidence that something _else_ is causing it 
and select is just the scapegoat.  It looks like interruptable sleeps are 
not being interrupted by signals somehow.  (sigalrm and siginfo at least 
were being blocked for the duration of the select()).

Other funny things were happening too, eg: cron will not run jobs on my 
system when built from an april 2 kernel.

Cheers,
-Peter




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