Messages in this thread | | | Date | Fri, 31 Oct 2008 10:39:24 +0100 | From | Ingo Molnar <> | Subject | Re: [patch] generic-ipi: fix the smp_mb() placement |
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* Jeremy Fitzhardinge <jeremy@goop.org> wrote:
> 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.
i think Suresh might be referring to some of the fragilities Xen had with generic-ipi. But those AFAICT were due to the on-stack lifetime bug that Nick fixed via the kmalloc? v2.6.26-ish issue.
Ingo
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