Re: [Xen-devel] [PATCH 1/2] vm_event: sync domctl

[Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>]

On 12/23/2015 04:53 PM, Tamas K Lengyel wrote:
> Introduce new vm_event domctl option which allows an event subscriber
> to request all vCPUs not currently pending a vm_event request to be paused,
> thus allowing the subscriber to sync up on the state of the domain. This
> is especially useful when the subscribed wants to disable certain events
> from being delivered and wants to ensure no more requests are pending on the
> ring before doing so.
> 
> Cc: Ian Jackson <ian.jackson@xxxxxxxxxxxxx>
> Cc: Stefano Stabellini <stefano.stabellini@xxxxxxxxxxxxx>
> Cc: Ian Campbell <ian.campbell@xxxxxxxxxx>
> Cc: Wei Liu <wei.liu2@xxxxxxxxxx>
> Cc: Razvan Cojocaru <rcojocaru@xxxxxxxxxxxxxxx>
> Signed-off-by: Tamas K Lengyel <tamas@xxxxxxxxxxxxx>

This certainly looks very interesting. Would xc_domain_pause() not be
enough for your use case then?


Thanks,
Razvan

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