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SubjectRe: lockup on Athlon systems, kernel race condition?
On Wed, Sep 04, 2002 at 05:05:58PM +0200, wrote:
> 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].

it was spinning on the first barrier loop, waiting for verification of the IPI arrival:

/* Wait for response */
while (atomic_read(&data.started) != cpus)

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