Re: [Xen-devel] [PATCH] xen/arm: Implement MPIDR per VCPU

[Julien Grall <julien.grall@xxxxxxxxxx>]

On 06/13/2013 03:59 PM, Ian Campbell wrote:

> On Fri, 2013-06-07 at 12:38 +0100, Julien Grall wrote:
>> Use different affinity for each VCPU and always expose an SMP systems to
>> the guest.
> 
> What is the bad effect of not doing this for 4.3? Does it fix an
> observable bug?

I didn't notice a specific bug, Linux uses the MPDIR mainly for
optimizing scheduling. Unlike Xen, Linux doesn't use it to know which
CPU is booting so we can defer it.

-- 
Julien


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