Linux's contemporary filesystem mount API went without documentation for six years — latest man-page package finally adds content for 2019 code
Linux's contemporary filesystem mount API has been missing documentation since 2019,

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Core system code doesn't move at quite the same pace as the latest vibe coders, and thankfully so, as it needs to be stable, efficient, and battle-tested. However, sometimes delays can get a little ridiculous, as was the case with the documentation for Linux's contemporary filesystem API. As noted by Phoronix, it was over a six-year wait for the info to appear in the standard man-page (manual page) documentation.
The tale goes like this: in 2019, Linux got the minty-fresh new filesystem mounting API, with the main "fsconfig," "fsmount," and "fsopen" calls replacing the old, monolithic "mount." This made it a lot easier for developers to use the new functionality, enjoying cleaner code, better error handling, and the ability to output proper error messages, rather than the cryptic "mount failed."
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Bruno Ferreira is a contributing writer for Tom's Hardware. He has decades of experience with PC hardware and assorted sundries, alongside a career as a developer. He's obsessed with detail and has a tendency to ramble on the topics he loves. When not doing that, he's usually playing games, or at live music shows and festivals.
