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SubjectRe: lockup on Athlon systems, kernel race condition?
Terence Ripperda wrote:
> I don't have things caught in the debugger currently, but I did check the registers at the time. bit 9 of eflags was enabled on both cpus.
That rules out a disabled interrupt flag.

What was cpu1 doing? There are 3 loops in smp_call_function:
spin_lock(&call_lock), and 2 while loops with barrier() [first one for
IPI arrival, second one for synchroneous ipi's. TLB flush is sync].


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