Hello! Cayetano Santos <[email protected]> skribis:
> A bit of background. CI farm builds every single pull request (pr) > which doesn’t impact more than 300 dependent¹: on success, the pr is > merged in master ... and rebuild back again, consuming computing > resources (see guix/guix!9274, for example). That’s not exactly true. Currently, pulls.ci.guix.gnu.org (aka. @guix-cuirass-bot) has no limit and that’s a limitation that will be addressed in Cuirass 1.4: https://codeberg.org/guix/cuirass/issues/30 In the meantime, I enforce a limit… by hand (canceling evaluations with more than 1,000 builds or so). Note that pulls.ci currently runs on a single x86 machine with 92 cores: https://codeberg.org/guix/maintenance/pulls/49 It’s becoming insufficient, but it’s also rather frugal. :-) > Beyond the current 300 threshold, a pr should be send to a topic > (team) branch; once every few, all the branch is built, all of its pr > in a raw. On success, the branch is merged in master: available > binaries are then available as substitutes, no extra computing > resources are used². > > Teams, branches and Guix QA³ are a great idea, and way more computing > efficient than processing individual pr. This is why I’m proposing > here a slightly different strategy to alter the fraction of changes > which fall into each category (see guix/guix!9314). > > - Reduce the current threshold from 300 to 150 dependents The problem is that there’s a lot of friction involved with topic branches: one needs to get a committer to actually create the branch, someone must email [email protected] (despite it being officially turned off in January 2026), optionally get someone to set up a jobset on ci.guix, monitor qa.guix.gnu.org to find out when the topic branch is next in line for merging, and finally get a committer to merge it. I think we should work to streamline this process, at least by getting guix-patches out of the loop. I don’t have a clear view on how to change the process, but I would rather not change the threshold until we’ve figured this out. Thoughts? Ludo’.
