How to set `InitRDTimestampMonotonic` from console?

[pmenzel+systemd-devel@xxxxxxxxxxxxx (Paul Menzel)]

Dear Dimitri,


Am 04.07.2018 um 12:24 schrieb Dimitri John Ledkov:

> On 4 July 2018 at 10:22, Lennart Poettering <lennart at poettering.net> wrote:
>> On Mi, 04.07.18 07:24, Paul Menzel (pmenzel+systemd-devel at molgen.mpg.de) wrote:
>>
>>> Dear systemd folks,
>>>
>>>
>>> Debian uses a shell script as `/init` in initrd, and I like to extend that,
>>> to set the time stamps for the initrd execution.
>>
>> This is part of the data that is serialized during the transition from
>> the systemd instance in the initrd to the systemd instance on the
>> host. The serialization is internal to systemd, and this is unlikely
>> to change, as it contains numerous bits of information that are
>> fragile and sensitive as the serialization really contains the full
>> service manager state with all its units and so on.
>>
>>> Is it possible to set that value from a shell script? If yes, could you
>>> please tell me how?
>>
>> It's not, and quite frankly I am not enthusiastic about the idea to
>> make this configurable...
> 
> At one point, I was considering to serialize just enough data to add
> these in the initramfs-tools (and/or systemd) as Debian specific
> patches to start supporting these measurements.
> And have a distro patch in systemd to read these measurements from a
> separately serialized file on boot-up.

Yeah, that wolud be good to have. Do you know, if there are feature 
requests for these already?

> Also, there are bootloader measurements, that I think we do not
> receive either from grub.

With Ubuntu 18.04 on a TUXEDO Book BU1406 with Ubuntu 18.04, UEFI 
firmware and GRUB, I get the output below.

> Startup finished in 5.793s (firmware) + 3.339s (loader) + 7.002s (kernel) + 8.107s (userspace) = 24.242s


Kind regards,

Paul