Re: [patch] Real-Time Preemption, -RT-2.6.10-rc1-mm3-V0.7.25-0

From: Gunther Persoons
Date: Thu Nov 11 2004 - 11:41:07 EST

Ingo Molnar wrote:

* Ingo Molnar <mingo@xxxxxxx> wrote:

just in case you are using UP-IOAPIC, could you enable CONFIG_SMP
(even if you are running an UP box) and see whether the lockup goes
away? Which was the last -RT kernel that you tried that didnt lock up
in this fashion?

if with CONFIG_SMP it's more stable, could you try the following: turn
off CONFIG_SMP again and edit arch/i386/kernel/io_apic.c and remove this

&& defined(CONFIG_SMP)

(there should be only one occurence of this string.)

this will turn the previous IO-APIC logic (used in -V0.7.24) back on.


It locked up after 20 minutes with CONFIG_SMP enabled.
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