Re: [gentoo-user] openrc->systemd command comparison

[Marc Joliet]

Am Wed, 01 Apr 2015 09:43:21 +0100
schrieb Peter Humphrey <peter@××××××××××××.uk>:

> On Wednesday 01 April 2015 02:04:05 Canek Peláez Valdés wrote:
>
> > """
> > # If you have cgroups turned on in your kernel, this switch controls
> > # whether or not a group for each controller is mounted under
> > # /sys/fs/cgroup.
> > [...]
> > # Set this to YES if yu want all of the processes in a service's cgroup
> > # killed when the service is stopped or restarted.
> > # This should not be set globally because it kills all of the service's
> > # child processes, and most of the time this is undesirable. Please set
> > # it in /etc/conf.d/<service>.
> > # To perform this cleanup manually for a stopped service, you can
> > # execute cgroup_cleanup with /etc/init.d/<service> cgroup_cleanup or
> > # rc-service <service> cgroup_cleanup.
> > # rc_cgroup_cleanup="NO"
> > """
>
> # grep -i cgroup /usr/src/linux/.config
> CONFIG_CGROUPS=y
> # CONFIG_CGROUP_DEBUG is not set
> CONFIG_CGROUP_FREEZER=y
> # CONFIG_CGROUP_DEVICE is not set
> CONFIG_CGROUP_CPUACCT=y
> # CONFIG_CGROUP_HUGETLB is not set
> # CONFIG_CGROUP_PERF is not set
> CONFIG_CGROUP_SCHED=y
> # CONFIG_BLK_CGROUP is not set
> # CONFIG_NETFILTER_XT_MATCH_CGROUP is not set
> # CONFIG_CGROUP_NET_PRIO is not set
> # CONFIG_CGROUP_NET_CLASSID is not set
>
> I wonder which of those, taken from my openrc system, are needed for the
> feature you quoted. I don't remember now why any of them are set at all,
> unless it was from a recommendation in a help text.

Apparently it's (partially) due to CONFIG_GENTOO_LINUX_PORTAGE (not
CONFIG_GENTOO_LINUX_INIT_SCRIPT as I originally thought):

    Selects: CGROUPS [=y] && NAMESPACES [=y] && IPC_NS [=y] && NET_NS [=y]

-- 
Marc Joliet
--
"People who think they know everything really annoy those of us who know we
don't" - Bjarne Stroustrup