Chris Down

tl;dr: If in doubt, prefer to use zswap.

tl;dr: Do not use signals in production wherever possible.

tl;dr: Using vfork(), one can create a process in a D state that is not immune to signal interruption.

Link: Meta developer blog As part of my work improving our production stability at Meta, one of the areas that I am frequently involved in is improving how operating system concepts and primitives are being used (or indeed misused).

A few months ago I got a report from a service owner that their service was crashing when trying to access certain files stored in tmpfs.

Top among the things I'm most glad that I rescued from the office before access was barred for COVID has to be my Advantage 2.

tl;dr: pip install gmute (repo) Configure ~/.config/gmute as per the documentation Add macro index M '<enter-command>set pipe_sep="\n_PIPE_SEP_\n"<enter><pipe-message>gmute<enter><sync-mailbox>' to your mutt configuration.

Link: https://github.com/cdown/psi-notify tl;dr: psi-notify can alert you when resources on your machine are becoming oversaturated, and allow you to take action before your system slows to a crawl.

(This post goes into some details about Arch Linux, but the general principles apply the same to other Linux distributions, too.)

Last week was the final week for this half's performance review at Facebook, where we write summaries of work and impact we and our peers had over the last half year.