Re: [PATCH RESEND v2 15/17] KVM: selftests: Add dirty ring buffer test

[Jason Wang]

On 2019/12/21 äå10:04, Peter Xu wrote:
> Add the initial dirty ring buffer test.
>
> The current test implements the userspace dirty ring collection, by
> only reaping the dirty ring when the ring is full.
>
> So it's still running asynchronously like this:


I guess you meant "synchronously" here.

Thanks


>              vcpu                             main thread
>
>    1. vcpu dirties pages
>    2. vcpu gets dirty ring full
>       (userspace exit)
>
>                                         3. main thread waits until full
>                                            (so hardware buffers flushed)
>                                         4. main thread collects
>                                         5. main thread continues vcpu
>
>    6. vcpu continues, goes back to 1