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Date:      Sat, 21 Nov 1998 16:55:20 +0100
From:      Poul-Henning Kamp <phk@critter.freebsd.dk>
To:        Eivind Eklund <eivind@yes.no>
Cc:        Barrett Richardson <terbart@aye.net>, garman@earthling.net, current@FreeBSD.ORG
Subject:   Re: more dying daemons 
Message-ID:  <7972.911663720@critter.freebsd.dk>
In-Reply-To: Your message of "Sat, 21 Nov 1998 16:43:44 %2B0100." <19981121164344.E17306@follo.net> 

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>We can't take 3.0 to be -STABLE until
>this bug and the clock bug is solved.

If by "the clock bug" you mean the "calcru negative..." it has been
nailed.  Many thanks to msmith, wosch & wpaul for help in tracking
it down.

It is as predicted caused by hardclock() interrupts being disabled
for far too long.  This seems to happen on some specific types of
hardware, the PLIP code for the parallel port being the most readily
available.

I'm currently running my torture tests on some patches which reduces
the rate at which we rotate the timecounter structures, this helps
a lot, and a kernel option will provide tweak-room for specific
bad hardware.

--
Poul-Henning Kamp             FreeBSD coreteam member
phk@FreeBSD.ORG               "Real hackers run -current on their laptop."
"ttyv0" -- What UNIX calls a $20K state-of-the-art, 3D, hi-res color terminal

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