From mboxrd@z Thu Jan 1 00:00:00 1970 From: random832@fastmail.com (Random832) Date: Tue, 14 Feb 2017 10:50:59 -0500 Subject: [TUHS] Another odd comment in V6 In-Reply-To: References: <378063CD-9B94-4AE3-B4BB-F41D2F6BFBF6@planet.nl> <868tp8kgxo.fsf@molnjunk.nocrew.org> Message-ID: <1487087459.1747940.880726560.386E6275@webmail.messagingengine.com> On Tue, Feb 14, 2017, at 09:18, Nick Downing wrote: > Having a hypothetical system with a very slow disk (or fast > CPU) in which disk accesses are blocking, would break many programs. > cheers, Nick That's not very hypothetical, but it is probably the reason disk access (and even access to regular files on networked filesystems) isn't interruptible, and non-blocking I/O useless in such situations, on some modern systems.