Messages in this thread | | | Subject | Re: [PATCH RFC 04/15] KVM: Implement ring-based dirty memory tracking | From | Paolo Bonzini <> | Date | Tue, 10 Dec 2019 14:31:54 +0100 |
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On 10/12/19 14:25, Michael S. Tsirkin wrote: >> There is no new infrastructure to track the dirty pages---it's just a >> different way to pass them to userspace. > Did you guys consider using one of the virtio ring formats? > Maybe reusing vhost code?
There are no used/available entries here, it's unidirectional (kernel->user).
> If you did and it's not a good fit, this is something good to mention > in the commit log. > > I also wonder about performance numbers - any data here?
Yes some numbers would be useful. Note however that the improvement is asymptotical, O(#dirtied pages) vs O(#total pages) so it may differ depending on the workload.
Paolo
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