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    SubjectRe: Device hang when offlining a CPU due to IRQ misrouting
    On Tue, Jun 05, 2007 at 04:57:07PM -0700, Darrick J. Wong wrote:
    > On Tue, Jun 05, 2007 at 02:14:51PM -0700, Siddha, Suresh B wrote:
    > > Can you send us your system's dmesg aswell as output of /proc/interrupts?

    Didn't find anything wrong in that information. Can you try this
    appended debug patch and see if you see this error msg in dmesg, when you
    hit the bug? Thanks.

    diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
    index d8bfe31..3409c1f 100644
    --- a/arch/x86_64/kernel/io_apic.c
    +++ b/arch/x86_64/kernel/io_apic.c
    @@ -720,10 +720,13 @@ static int assign_irq_vector(int irq, cpumask_t mask)
    int err;
    unsigned long flags;
    + int cpu = smp_processor_id();

    spin_lock_irqsave(&vector_lock, flags);
    err = __assign_irq_vector(irq, mask);
    spin_unlock_irqrestore(&vector_lock, flags);
    + if (err && !cpu_isset(cpu, cpu_online_map))
    + printk("assigning irq to a vector failed : %d\n", err);
    return err;

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      Last update: 2007-06-06 03:45    [W:0.026 / U:43.764 seconds]
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