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SubjectRe: [patch] generic-ipi: fix the smp_mb() placement
Suresh Siddha wrote:
> We didn't see the lockup in our tests but Xen folks reported similar failures
> with their smp call function code.
>

...really? I don't remember anything like that, but perhaps I'm
forgetting something. In Xen the IPI is sent with a hypercall, which is
definitely a solid enough barrier for these purposes.

J


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