Re: [patch] generic-ipi: fix the smp_mb() placement

[Jeremy Fitzhardinge]

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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