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More info on VP6 panics

DISCUSSION Ian Pilcher 1 participant 1 message Jan 17, 2004 ACPI

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Background: I get a kernel panic when I boot 2.4.2{2,3,4} with ACPI on my dual-processor Abit VP6. Compiling the kernel with CONFIG_DEBUG_SLAB turned on allows it to boot, as does booting with "idle=poll".

I do not believe that the panic occurs anywhere in the ACPI code. From what I can tell, the transition to ACPI mode causes the idle thread on the other processor to panic.

I believe that I have identified the line of code that triggers the panic. It is the actual transition to ACPI mode at drivers/acpi/hardware/hwacpi.c, line 143. If I insert an infinite loop before the call to acpi_os_write_port, the boot process simply hangs. If I move the loop below the call to acpi_os_write_port, I get the same old panic message.

How can I debug this further?

Thanks!

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Ian Pilcher                                        [email protected]
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