Re: ACPI call for testing

[Wolfgang Solfrank <Wolfgang%Solfrank.net@localhost>]

Hi again,

> While this avoids the problem with the interrupt storm resulting from
> the previous patch, it doesn't help the initial problem of apparently
> blocking interrupts for way too long :-(.

Ok, turns out that interrupts aren't really blocked, but that the CPU
has a bug (AMD erratum #400) that makes it not wake up from C1E or C3
sleep state from a lapic timer interrupt.  So it's not really an ACPI
problem, but a result from the side effect that with ACPI the cpu is
sent into some sleep state in the idle loop.

Disabling the use of lapic_clockintr, i.e. using the i8254 for clock
interrupts, makes the system more or less work with ACPI.  However,
it's still a bit slow, as building my custom kernel requires 1:31 with
ACPI enabled, while without ACPI the system does it in 0:55.

Ciao,
Wolfgang
--
Wolfgang%Solfrank.net@localhost                          Wolfgang Solfrank