Dustin L. Howett on Nostr: this is the part that alarms me the most: > It syncs the filesystem fully, including ...

this is the part that alarms me the most:

> It syncs the filesystem fully, including Btrfs metadata (which systemd skips).

It suggests that there is something Btrfs is doing—some special IOCTL interface or something—which is non-standard. The filesystem driver should be completely in charge of making sure its on-disk state is consistent across power events without special userland knowledge.

If it can’t do that, it isn’t taking advantage of the fact that it’s in the kernel!

cont