On 1/7/20 11:07 AM, Benjamin Berg wrote:
> On Tue, 2020-01-07 at 09:47 +0000, Zbigniew Jędrzejewski-Szmek wrote:
>> On Mon, Jan 06, 2020 at 02:53:13PM -0600, Michael Catanzaro wrote:
>>> On Mon, Jan 6, 2020 at 7:09 pm, Lennart Poettering
>>> <mzerqung@xxxxxxxxxxx> wrote:
>>>> - facebook is working on making oomd something that just works for
>>>> everyone, they are in the final rounds of canonicalizing the
>>>> configuration so that it can just work for all workloads without
>>>> tuning. The last bits for this to be deployable are currently being
>>>> done on the kernel side ("iocost"), when that's in, they'll submit
>>>> oomd (or simplified parts of it) to systemd, so that it's just there
>>>> and works. It's their expressive intention to make this something
>>>> that also works for desktop stuff and requires no further
>>>> tuning. they also will do the systemd work necessary. time frame:
>>>> half a year, maybe one year, but no guarantees.
>>>
>>> Asking around, I understand oomd only operates at the cgroup level,
>>> i.e. it kills an entire cgroup at once, not individual processes. So
>>> I understand this would also depend on GNOME-level work to ensure
>>> individual applications get launched in their own systemd scopes,
>>> yes?
>>
>> I wanted to ask about this too... but didn't know where ;)
>> As of today, gnome-shell in F31 seems to start almost everything
>> as separate systemd user scopes:
>>
>> - various services started automaticlly like /usr/libexec/gsd-power,
>> /usr/libexec/gsd-sound, etc.
>>
>> - flatpaks (this seems to be new, I had them running under
>> gnome-shell-wayland.service last week!)
>
> Hmm, pretty sure flatpaks have always created their own scopes.
>
>> Stuff started from the run dialog (alt-f2) and from
>> the overview still seems to land in gnome-shell-wayland.service,
>> but maybe this is fixed in gnome-shell 3.35?
>
> This should have changed with the gnome-shell 3.34.2 update in Fedora
> 31. It may be that it has not reached rawhide yet though.
>
Just had a look at awesome, all applications seem to be in the same
cgroup, according to systemd-cgtop. Thus if the whole cgroup would be
killed, that means rather then stopping firefox if it uses to much
memory, my whole session would be terminated.
>> Another issue is that things that are started through the gnome
>> terminal also land in gnome-terminal-server.service. They need to
>> get their own scopes to make resource allocation robust.
>
> Do you think we should just place each VT into its own scope?
>
> That seems like a reasonable start in principle, though graphical
> applications launched from the terminal may still not be moved into
> their own scope then.
>
>> It seems we're quite close! Do we just need to wait for another
>> gnome release and then we'll have everything nicely segregated?
>
> Likely not perfect, but hopefully close enough for many purposes :)
>
> Benjamin
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