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    SubjectRe: 2.6.13-rc7-rt1
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    Date
    Devastating latency on a 3Ghz xeon .. Maybe the raw_spinlock in the
    timer base is creating a unbounded latency?

    Daniel

    ( softirq-timer/1-13 |#1): new 66088 us maximum-latency critical section.
    => started at timestamp 1857957769: <__down_mutex+0x5f/0x295>
    => ended at timestamp 1858023857: <_raw_spin_unlock_irq+0x16/0x39>

    Call Trace:<ffffffff80144816>{check_critical_timing+491} <ffffffff8047732a>{rt_secret_rebuild+0}
    <ffffffff80144adb>{trace_irqs_on+100} <ffffffff80508da5>{_raw_spin_unlock_irq+22}
    <ffffffff8013303b>{run_timer_softirq+1916} <ffffffff8012f0d6>{ksoftirqd+241}
    <ffffffff8012efe5>{ksoftirqd+0} <ffffffff8013f961>{kthread+218}
    <ffffffff8010e9c2>{child_rip+8} <ffffffff8013f887>{kthread+0}
    <ffffffff8010e9ba>{child_rip+0}
    ---------------------------
    | preempt count: 00000000 ]
    | 0-level deep critical section nesting:
    ----------------------------------------

    => dump-end timestamp 1858101914



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