PII SMP system hangs during boot with ACPI enabled
Poul-Henning Kamp
phk at phk.freebsd.dk
Mon Nov 24 13:31:04 PST 2003
In message <XFMail.20031124130939.jdp at polstra.com>, John Polstra writes:
>On 24-Nov-2003 Nate Lawson wrote:
>> It's a long shot, but what about setting kern.timecounter.hardware to
>> i8254. It appears your ACPI timer is bad. The reason why I suggest this
>> is that it seems like interrupts are being lost.
>
>I put kern.timecounter.hardware="i8254" into /boot/loader.conf, but
>it didn't make any difference. Are you sure it even works from
>loader.conf? From the sources it looks like this is a sysctl rather
>than a tunable. I could change it to a tunable, though, if you
>think it's worthwhile.
It would be rather complicated to make it a tunable. Far easier to
go into the ACPI timecounter and just give it a negative quality,
that will disable it.
I'm not sure why Nate think this will change anything with respect
to interrupts, but I pressume he knows what he's talking about.
--
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
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