Re: [Xen-devel] [PATCH 6/10] Allow vcpu to pause self

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 27/6/07 14:37, "Tian, Kevin" <kevin.tian@xxxxxxxxx> wrote:

> Add self pause ability, which is required by vcpu0/dom0 when
> running on a AP. This can't be satisfied by existing interface,
> since the new flag also serves as a sync point.
> 
> Signed-off-by Kevin Tian <kevin.tian@xxxxxxxxx>

I think this should not be needed. Why is dom0/vcpu0 special at all? If you
are doing the final work from a softirq context, can't dom0/vcpu0 simply be
paused like all others at that point? If not then we'll need to make some
arrangement using vcpu_set_affinity() - I won't add another flag on the
context-switch path.

So currently patches 6,7,9,10 are not applied. Patches 6 & 7 because they
need more iteration, as commented above. Patches 9 & 10 will likely change
when the platform_op hypercall interface is slimmed down, so I'm leaving
them out for now.

All other patches are in (although the platform_op interface part of patch 2
is disabled).

 -- Keir


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