On Thu, May 11, 2023, Dionna Amalie Glaze wrote: > Would it be okay to request that we add a KVM stat for how often there > are GUEST_REQUEST_NAE exits? I think it'd be good for service > operators to get a better idea how valued the feature is. Heh, it's always ok to request something, but sometimes the answer will be no. And in the case, the answer is likely "no stat for you". A year or so ago, in the context of us (Google) trying to upstream a pile of stats, we (KVM folks) came to a rough consensus that KVM should only add upstream stats if they are relatively generic and (almost) universally useful[*]. IMO, a one-off stat for a specific exit reason is too narrowly focused, e.g. collecting information on all exit reasons is superior. And no, that won't be accepted upstream either, because for some environments gathering detailed information on all exits is too much overhead (also covered in the link). FWIW, we (GCE) plan on carrying stats like this in out-of-tree patches, i.e. your request for stats is likely something that would get accepted internally (if it isn't already captured through our generic stats collection). [*] https://lore.kernel.org/all/87czp0voqg.wl-maz@xxxxxxxxxx
