RE: Serious problem with ticket spinlocks on ia64

[Luck, Tony]

> If this is a memory ordering problem (and that seems quite plausible)
> then a liberal sprinkling of "ia64_mf()" calls throughout the spinlock
> routines would probably make it go away.

I think I take this back ... if it were a memory ordering problem, then
it could show up any time - not just at wrap-around.

-Tony
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