Re: [Libguestfs] [PATCH v4 07/12] v2v: nbdkit: Add the readahead filter unconditionally if it is available.

> Is it usable without any plugins? Does the null plugin take much space? I > wouldn't think so. Would it be too messy to just ship the null plugin > unconditionally, even if just for this particular purpose? Right! My original plan was that we could change the API to drop all required callbacks. The "null" plugin would become the plugin which had no callbacks and could therefore be built in to the nbdkit binary. Unfortunately my plan doesn't quite work because the null plugin has a config parameter (nbdkit-zero-plugin is more like this "null" plugin). Oh well.

> On the other hand any program that relies on such probing to work > might depend not only on nbdkit, but also on the null plugin. Indeed, or as you say above we could package one of the regular plugins with the server to guarantee it is always available.