[systemd-devel] more verbose debug info than systemd.log_level=debug?

[Lennart Poettering]

On Sun, 09.04.17 10:11, Michael Chapman (mike at very.puzzling.org) wrote:

> Don't forget, they've provided an interface for software to use if it needs
> more than the guarantees provided by sync. Informally speaking, the FIFREEZE
> ioctl is intended to place a filesystem into a "fully consistent" state, not
> just a "fully recoverable" state. (Formally it's all a bit hazy: POSIX
> really doesn't guarantee anything with sync.)

FIFREEZE does considerably more than what you suggest: it also pauses
all further changes until FITHAW is called. And that's semantics we
really cannot have.

Lennart

-- 
Lennart Poettering, Red Hat