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

[Michael Chapman]

On Mon, 10 Apr 2017, Chris Murphy wrote:
> On Sun, Apr 9, 2017 at 5:17 AM, Lennart Poettering
> <lennart at poettering.net> wrote:
>
>> That said, are you sure FIFREEZE is really what we want there? it
>> appears to also pause any further writes to disk (until FITHAW is
>> called).
>
>> So, I am still puzzled why the file system people think that "sync()"
>> isn't supposed to actually sync things to disk...
>
> https://www.spinics.net/lists/linux-xfs/msg05113.html

Ah good, Dave actually suggests using a freeze there. A freeze without a 
corresponding thaw should be OK if it's definitely after all processes 
have been killed, since we're just about to reboot anyway. (Obviously we'd 
want to avoid the whole lot when running in a container or when doing 
kexec.)

I'll try to reproduce the problem (I don't use Plymouth, so I haven't seen 
it myself yet) and come up with a patch.