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From: =?utf-8?Q?Dag-Erling_Sm=C3=B8rgrav?= <des@des.no>
To: Alexander Motin <mav@FreeBSD.org>
References: <86bou59gpf.fsf@ds4.des.no> <4E83186C.4080707@FreeBSD.org>
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Date: Thu, 13 Oct 2011 13:36:05 +0200
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Cc: current@freebsd.org
Subject: Re: 9 hangs with idletick = 0
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Dag-Erling Sm=C3=B8rgrav <des@des.no> writes:
> I've just built a kernel with KTR support, and with KTR_SPARE2, KTR_INTR
> and KTR_SCHED enabled by default.  I'll see what turns up.  I'm also
> going to try machdep.idle=3Dhlt with kern.eventtimer.idletick=3D0, and us=
ing
> a PCI re(4) instead of the on-board msk(4) while running with default
> settings.

Great, the bug does not occur when KTR is enabled.  The machine has been
up for 14+ hours without crashing, despite plenty of network activity,
which usually triggers a freeze within minutes.

It looks like there may still be short freezes (a few seconds at a
time).  I'm thinking of instrumenting fetch(1) to record any instances
of fread() taking more than, say, half a second.

DES
--=20
Dag-Erling Sm=C3=B8rgrav - des@des.no