On Thu, Nov 7, 2019 at 5:39 AM David Howells <dhowells@xxxxxxxxxx> wrote: > > Allow a buffer to be marked such that read() must return the entire buffer > in one go or return ENOBUFS. Multiple buffers can be amalgamated into a > single read, but a short read will occur if the next "whole" buffer won't > fit. > > This is useful for watch queue notifications to make sure we don't split a > notification across multiple reads, especially given that we need to > fabricate an overrun record under some circumstances - and that isn't in > the buffers. Hmm. I'm not totally in love with introducing a new error code like this for read(), especially if it could affect the kind of pipe that is bound to a file in a filesystem. But maybe it's not a problem.
