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Hoo boy...what have I gotten myself into?

zev honked 09 Jan 2026 11:21 -0800

Glancing through @paulmckrcu's perfbook, it occurs to me that the strength/weakness of a CPU architecture's memory model is in most cases reasonably approximated lexically.

How does SPARC compare to Itanium? Well, I comes before S, so ia64 is the weaker of the two.

alphabetically-sorted table of different ISA's memory-ordering properties

zev honked back 01 Dec 2025 15:16 -0800
in reply to: https://mastodon.well.com/users/rk/statuses/115646579515540839

@rk @cks @mothcompute I believe AFS has a similar mechanism wherein a symlink named @foo resolves to the output of runing foo as a command -- primarily used in the form of @sys, which would point to e.g. linux-i386 or sunos-sparc or whatnot for bin directories and such in the days of more heterogeneous networks.

(Granted, I wonder if it was really just that support for that particular pattern was special-cased, given what a nightmare it would be implementation-wise and performance-wise to actually execute arbitrary commands in the middle of namei() or the like...)

zev bonked 27 Nov 2025 08:40 -0800
original: benjojo@benjojo.co.uk

This MacOS (APFS?) quirk was mentioned at the pub last night, and I still cannot believe this actually works when I tried it myself

A terminal showing the command "ssh" being run and then the same output when "ßh" is run