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edd3de6fc3
It's only used to override the existing dirty ring size/count. If with a bigger ring count, we test async of dirty ring. If with a smaller ring count, we test ring full code path. Async is default. It has no use for non-dirty-ring tests. Reviewed-by: Andrew Jones <drjones@redhat.com> Signed-off-by: Peter Xu <peterx@redhat.com> Message-Id: <20201001012241.6208-1-peterx@redhat.com> Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>