On Di, 24.04.18 11:36, Chris Murphy (lists@xxxxxxxxxxxxxxxxx) wrote: > Note that fsync() is actually insufficient at least some of the time > on all journaled file systems. e.g. dracut -f only does fsync() on the > copied over initramfs to /boot and that new initramfs is often not > seen by the bootloader for journaled file systems. Instead, the > bootloader sees the old initramfs that had been deleted, which during > boot (if successful) replays the log and completes the delete of old > initramfs, and now the new one appears and isused at next boot. Other > combinations are possible. BTW, just to mention this: by default, if you let systemd mount the EFI ESP for you then it will do that as automount point, meaning after a few seconds of not accessing the ESP it will be unmounted again. This means during normal operation the ESP won't be mounted at all, and it will only be mounted (and thus potentially be in a dirty state) for a very short time window around actual accesses, even though it appears available all the time due to the automount logic. Quite frankly, I think it would be a good idea, to just drop the seperate /boot stuff, and simply place the kernel+initrd directly in the ESP, and let systemd do its automount magic on it. That has the benefit that the firmware groks the file system as well as our kernel does, and that we do our best to keep the fs in the cleanest state possible. In addition it's a much simpler approach, as we just reuse the stuff already there and don't invent anything complex new. Lennart -- Lennart Poettering, Red Hat _______________________________________________ devel mailing list -- devel@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe send an email to devel-leave@xxxxxxxxxxxxxxxxxxxxxxx
