sched_autogroup interactivity patch for the desktop

[Ilyes Gouta]

Hi Leenart,

> Dhaval Giani pointed out to me that the same can be done from userspace
> simply by creating a cgroup for each session in the cpu hierarchy. Turns

So a session's (as you're referring) initiator to would be the terminal
emulator process that has a virtual tty and systemd detect those and setup a
proper cgroup so that we could differentiate when scheduling with other
processes?

-Ilyes

On Tue, Nov 16, 2010 at 6:14 PM, Lennart Poettering <mzerqung at 0pointer.de>wrote:

> On Tue, 16.11.10 16:58, Ilyes Gouta (ilyes.gouta at gmail.com) wrote:
>
> > Hi,
> >
> >
> http://linux.slashdot.org/story/10/11/16/1330233/The-200-Line-Linux-Kernel-Patch-That-Does-Wonders
> > patch: http://marc.info/?l=linux-kernel&m=128978361700898&w=2
> >
> > Can we have this patch back ported into the current kernel for Fedora 14
> and
> > possibly posted as an update? :)
>
> This appears completely backwards to me. Attaching things like this to a
> TTY is just wrong, because normally we don't have a single TTY around on
> most graphical sessions.
>
> The kernel doesn't really have a notion of what a "session" is (only the
> audit subsystem kinda has), but if this grouping behaviour is supposed
> to be bound to a session, then attaching it to a TTY is a pretty shitty
> replacement.
>
> Dhaval Giani pointed out to me that the same can be done from userspace
> simply by creating a cgroup for each session in the cpu hierarchy. Turns
> out systemd actually does pretty much that, except in the named systemd
> hierarchy. It is trivial modification to create a group in both
> hierarchies.
>
> Lennart
>
> --
> Lennart Poettering - Red Hat, Inc.
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