Re: [Xen-devel] wait_on_xen_event_channel

["Ky Srinivasan" <ksrinivasan@xxxxxxxxxx>]

Thanks Kier; I am  prototyping  a simple continuation scheme to support what I 
need. I will keep you posted.

Regards,

K. Y

>>> On Thu, Mar 8, 2007 at  2:57 AM, in message
<C2157250.37F8%Keir.Fraser@xxxxxxxxxxxx>, Keir Fraser
<Keir.Fraser@xxxxxxxxxxxx> wrote: 
> On 7/3/07 23:40, "Ky Srinivasan" <ksrinivasan@xxxxxxxxxx> wrote:
> 
>> Why does this macro take port as an argument?
> 
> It's logically a part of the interface for callers, but it turns out that,
> at least right now, a simple implementation that can completely ignore the
> port argument works just fine. That may change in future.
> 
>> It does not look like the port
>> argument is used in the macro.  I want to implement a blocking 
> synchronization
>> primitive in the hypervisor where the invoking vcpu will relinquish the CPU;
>> and the execution would resume out of the blocking primitive when the vcpu 
> is
>> "woken up".  The wait_on_xen_event_channel appeared to be what I wanted on
>> "switch out" side; however when the vcpu is awakened the execution is not
>> restored where I thought it would be.
> 
> Since Xen/x86 doesn't have per- vcpu Xen stacks, you have to manually create
> a continuation (somehow). Depending on what you want to do, we can probably
> add what it is you need.
> 
>  --  Keir


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