Re: [PATCH][2.5] Honour dont_enable_local_apic flag

Date: Sun Jun 01 2003 - 18:08:20 EST

On 01 Jun 2003 12:26:56 -0400, Brian J. Murrell wrote:
>> So what vendor/model CPU is used in the failure case?
>VMware 2.0.4.

Details, please. What does `cat /proc/cpuinfo` say?

My intention here is that we should be able to detect
this apparently broken "CPU" by its vendor/model and
clear cpu_has_apic for it.

Alternatively the no_apic label in detect_init_APIC()
could clear cpu_has_apic.

>> 3. What is the exact failure? Hang or crash?
>Normal boot until here:
>Using local APIC timer interrupts.
>calibrating APIC timer ...
>..... CPU clock speed is 1658.7651 MHz.
>..... host bus clock speed is 0.0000 MHz.
>cpu: 0, clocks: 0, slice: 0

Hmm, obviously a 2.4 kernel.
Looks like a hang in setup_APIC_timer(). My guess is that
the do loops in that procedure don't work if clocks==0
or the local APIC timer registers are frozen.

To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to
More majordomo info at
Please read the FAQ at

This archive was generated by hypermail 2b29 : Sat Jun 07 2003 - 22:00:15 EST