Date: Tue, 23 Nov 2010 01:21:33 +0100 From: Ivan Voras <ivoras@freebsd.org> To: freebsd-current@freebsd.org Subject: Re: A big-ish machine, cannot boot Message-ID: <icf1ee$vfr$1@dough.gmane.org> In-Reply-To: <201011220756.26727.jhb@freebsd.org> References: <ic65q8$a76$1@dough.gmane.org> <AANLkTi=j3C3ccXPJOZpOnxuXVh5sCkx0cdmv-a7CxszJ@mail.gmail.com> <201011191320.59156.jkim@FreeBSD.org> <201011220756.26727.jhb@freebsd.org>
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On 11/22/10 13:56, John Baldwin wrote: > On Friday, November 19, 2010 1:20:53 pm Jung-uk Kim wrote: >> I bet these are "legacy free" machines, right? I recently noticed >> that recent Intel chipsets cause incredibly long delays when >> non-existent ISA ports are accessed, most notably AT keyboard ports. >> (My gut tells me it is going in and out of SMM repeatedly for >> nothing.) Back in the old days, when we had real ISA bus, it used to >> delay very short and fixed amount time. Those days, this behaviour >> was even (ab)used as a delay function where a real timer is not >> available yet. ;-) >> >> Try getting rid of all unnecessary device drivers from your kernel >> configuration. Well, there are no ISA devices in the AMD64 GENERIC that I can see... > Someone had some patches to the atkbd early probe to work around long delays > during the keyboard probe for this reason. I've just tried booting 9-CURRENT and it is much faster. There's still a delay (maybe a minute) but definitely faster.
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