Re: [tip:irq/numa] x86: read apic ID in the !acpi_lapic case

Yinghai Lu
2009-05-12T18:36:28Z

Ingo Molnar wrote:
> * Yinghai Lu <yinghai@kernel.org> wrote:
>
>> Ingo Molnar wrote:
>>> got this on a testbox:
>>>
>>> [ 0.113333] WARNING: at arch/x86/kernel/apic/apic.c:253 warn_slowpath_null+0x28/0x50()
>>>
>>> Ingo
>>>
>>> [ 0.000000] Initializing cgroup subsys cpuset
>>> [ 0.000000] Linux version 2.6.30-rc5-tip-01553-g4bc9bac-dirty (mingo@sirius) (gcc version 4.3.2 20081105 (Red Hat 4.3.2-7) (GCC) ) #48764 SMP PREEMPT Tue May 12 18:30:18 CEST 2009
>>> [ 0.000000] Command line: root=/dev/sda1 earlyprintk=serial,ttyS0,115200 console=ttyS0,115200 console=tty debug initcall_debug apic=verbose sysrq_always_enabled 5 ignore_loglevel nosmp no_hz=off highres=0 nmi_watchdog=0 noapic nolapic_timer hpet=disable idle=poll notsc acpi=off
>> you should use
>> nolapic and noapic_timer
>>
>> /* same as disableapic, for compatibility */
>> static int __init setup_nolapic(char *arg)
>> {
>> return setup_disableapic(arg);
>> }
>> early_param("nolapic", setup_nolapic);
>>
>> static int __init parse_disable_apic_timer(char *arg)
>> {
>> disable_apic_timer = 1;
>> return 0;
>> }
>> early_param("noapictimer", parse_disable_apic_timer);
>
> What do you mean? This warning never triggered before on this
> test-box. This is a plain regression.

just a reminder: that in your command there are some typo: should use nolapic and noapic_timer.

YH