Jens Axboe <axboe@xxxxxxxxx> writes: > Yes, it would ideally wait, or at least trigger on the last one. I'll > see if I can improve that. For any of my testing, the amount of > triggered short reads is minimal. For the verify case that we just ran, > we're talking 8-12 ios out of 820 thousand, or 0.001% of them. So > nothing that makes a performance difference in practical terms, though > it would be nice to not hand back short reads if we can avoid it. Not > for performance reasons, but for usage reasons. I think you could make the case that handing back a short read is a bug (unless RWF_NOWAIT was specified, of course). At the very least, it violates the principle of least surprise, and the fact that it happens infrequently actually makes it a worse problem when it comes to debugging. -Jeff
