My 5000/150 is now able to keep time (via NTP) and run a "make build"
at the same time - thank you very much!!!  -- Ken

Toru Nishimura wrote:
> 
> Attention please.  This is a hot fix.
> 
> /// DESCRIPTION ///
> NetBSD/mips users have been suffered from general slowness or severe
> clock drift when system activity is high.  Other camps of NetBSD
> ports were found recently to run system kthreads (pagedaemon,
> ioflush, reaper, aiodoned) in splhigh condition.  And then NetBSD/mips
> was proven to have the same error.
> 
> I thought NetBSD/mips was immune from it as pcb0 was forced to have
> spl0 condition which was propagated to all of children, but it was a
> wrong fix.  The issue is pcb0 gets overwritten before the first
> kthread_create1() is called.  For a normal process which has user mode
> it doesn't matter because proc_trampoline() makes the process to have
> spl0 during exception return path to user mode, however, kthreads stay
> in kernel mode mistakenly left in splhigh condition.
> 
> /// FIX ///
> Make sure to have spl0 condition whenever a new thread of control
> is created.
> 
> /// COMMENT ///
> This is another, probably the 3rd, occation where processor
> is forced to have explicit "interrupt level" assignment for SR.
> 
> Tohru Nishimura
> Information Technology Centre
> Nara Institute of Science and Technology