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bcachefs

bcachefs

Posted Feb 22, 2025 23:45 UTC (Sat) by intelfx (subscriber, #130118)
In reply to: bcachefs by koverstreet
Parent article: Filesystem support for block sizes larger than the page size

> but if you do know of some please let me know.

Package managers? Text editors? Basically anything that currently has to do the fsync+rename+fsync dance?

Now, I'm not saying that someone should get on coding userspace transactions yesterday™, but at a glance, there are definitely uses for that.

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bcachefs

Posted Feb 27, 2025 10:30 UTC (Thu) by koverstreet (✭ supporter ✭, #4296) [Link]

That fsync already isnn't needed on bcachefs (nor ext4, and maybe xfs as well) since we do an implicit fsync on an overwrite rename, where we flush the data but not the journal.

That is, you get ordering, not persistence, which is exactly what applications want in this situation.


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