> In short some code like:
>
> timer_ack = !(cpu_has_tsc &&
> APIC_INTEGRATED(GET_APIC_VERSION(apic_read(APIC_LVR))));
>
> should suffice as the condition to disable the code in
> do_timer_interrupt() for systems using the through-8259A mode. There is
> no need to keep it enabled unconditionally and I/O cycles are quite
> expensive. The following patch implements it. Please test it. It should
> cure your problems as a side effect, but that does not mean the BIOS isn't
> to be fixed.
please consider submitting this patch to Linus and Marcelo.
Perhaps it needs testing by some more people,
but I think it's the right thing to do.
Martin
-- Martin Wilck Phone: +49 5251 8 15113 Fujitsu Siemens Computers Fax: +49 5251 8 20409 Heinz-Nixdorf-Ring 1 mailto:Martin.Wilck@Fujitsu-Siemens.com D-33106 Paderborn http://www.fujitsu-siemens.com/primergy
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