On Fri, Aug 11, 2023 at 7:12 PM Yosry Ahmed <yosryahmed@xxxxxxxxxx> wrote: > [...] > > I am worried that writing to a stat for flushing then reading will > increase the staleness window which we are trying to reduce here. > Would it be acceptable to add a separate interface to explicitly read > flushed stats without having to write first? If the distinction > disappears in the future we can just short-circuit both interfaces. What is the acceptable staleness time window for your case? It is hard to imagine that a write+read will always be worse than just a read. Even the proposed patch can have an unintended and larger than expected staleness window due to some processing on return-to-userspace or some scheduling delay.
