[systemd-devel] [lennart at kemper.freedesktop.org: [systemd-commits] src/pam-module.c]

[Andrey Borzenkov]

On Tue, Feb 8, 2011 at 3:11 PM, Lennart Poettering
<lennart at poettering.net> wrote:
> Weird, weird, weird. So, systemd is in the right cgroup with correct
> settings but still doesn't have the privs to make itself RT. There's
> something very weird here.
>

Kernel bug.

commit f44937718ce3b8360f72f6c68c9481712517a867
Author: Mike Galbraith <efault at gmx.de>
Date:   Thu Jan 13 04:54:50 2011 +0100

    sched, autogroup: Fix CONFIG_RT_GROUP_SCHED sched_setscheduler() failure

    If CONFIG_RT_GROUP_SCHED is set, __sched_setscheduler() fails due
to autogroup
    not allocating rt_runtime.  Free unused/unusable rt_se and rt_rq,
redirect RT
    tasks to the root task group, and tell __sched_setscheduler() that it's ok.