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

    * 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.

    Ingo


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