Work on GEFS (the Good Enough File System) for OpenBSD progresses
Quick read
A progress report on GEFS, a new file system being developed for OpenBSD, describing recent code updates and remaining work. Someone interested in file system development or testing on OpenBSD would visit to learn the current state and try the code if able.
- Updated code rebased with latest fixes and error handling
- mkfs works on OpenBSD; userspace snapshot control still missing
- Discussion of commit ordering, barriers and syncer design approaches
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A closer look at Work on GEFS (the Good Enough File System) for OpenBSD progresses
What this article reports about GEFS on OpenBSD
This is a short progress report about GEFS (the Good Enough File System) being developed for OpenBSD, contributed by Peter N. M. Hansteen and quoting a message from Ori. It describes recent code updates, rebases, error-handling work, and forward-ported bugfixes from 9front. It also notes that the filesystem currently leaves the first FS block unused by default so disklabels can be placed there.
What you can actually do or test from the writeup
The post says some userspace tools exist so you can now mkfs on OpenBSD, but snapshot control has not been implemented yet. Ori sketches a possible userspace 'gefs' program with commands such as gefs debug, gefs usereserve, gefs retain, gefs snap, and gefs fork, and invites people who are able to test the work to do so. Links to the code and documentation were included in the quoted message (the article itself points readers to those links).
Who will find this interesting or useful
People who follow OpenBSD filesystem development, developers who can build and test experimental filesystems, and anyone interested in having a more modern filesystem in OpenBSD will find the details relevant. The article notes GEFS is being developed with a mindset that fits OpenBSD and that development is happening "inside the tree" though a comment later corrects that it is not in the tree yet.
Questions people ask about Work on GEFS (the Good Enough File System) for OpenBSD progresses
- Can I make a GEFS filesystem on my OpenBSD system now?
- The article says some userspace tools have been done and you can now mkfs on OpenBSD, but snapshot control is not yet available.
- Where can I find the code or more documentation?
- The quoted message in the article includes links to the code and documentation; the post asks people who can test to follow those links and try it out.
- Is GEFS already merged into the OpenBSD source tree?
- A comment in the article points out that GEFS is not in the tree yet, despite an earlier statement suggesting development inside the tree.
Work on GEFS (the Good Enough File System) for OpenBSD progresses was shared on NexURLs by Nexis on November 2, 2026, in Tech & AI.
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Quick answers
What is Work on GEFS?
Work on GEFS (undeadly.org): A progress report on GEFS, a new file system being developed for OpenBSD, describing recent code updates and remaining work. Someone interested in file system development or testing on OpenBSD would visit to learn the current state and try the code if able.
Who shared Work on GEFS on NexURLs?
It was shared by Nexis in November 2026. Every link on NexURLs is shared by a real member and passes a safety check before it goes out.
What are some sites like Work on GEFS?
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