On Tue, Oct 29, 2013 at 5:52 PM, Kay Sievers <[email protected]> wrote: > On Tue, Oct 29, 2013 at 5:39 PM, Thomas Bächler <[email protected]> wrote: >> Am 29.10.2013 17:21, schrieb Colin Guthrie: > >>> 'Twas brillig, and Umut Tezduyar at 29/10/13 15:17 did gyre and gimble: >>>> I have noticed DefaultControllers= option is no longer in system.conf >>>> file. Has it been moved to somewhere else or are all controllers >>>> default controllers by default? >>> >>> See the various posts on this list and in blogs regarding the cgroups >>> rework. In particular see the mails with the subject "[HEADSUP] cgroup..." >>> >>> See also: >>> http://www.freedesktop.org/wiki/Software/systemd/ControlGroupInterface/ >> >> None of this explains why systemd no longer applies certain controllers >> by default. Previously, systemd would attach cpu controllers to each >> service by default. Now, it only groups your processes in the systemd >> tree, but does not touch any cgroup controllers. >> >> The new default behaviour (or lack thereof) seems like a step back to me. > > It's a property of a unit now which cgroup controllers get attached: > > http://www.freedesktop.org/software/systemd/man/systemd.resource-control.html > > The global mirroring across trees makes no sense in the future. The > several independent trees will go away in the kernel next year, and > then systemd would not know what to do with an instruction like > DefaultControllers.
I don't disagree that mirroring will not make sense in the future. Though, without global mirroring on cpuacct I don't understand how systemd-cgtop is expected to give cpu accounting information of individual services. Also without global mirroring on cpu control group, how would CPUShares=weight even work on any service. I am just confused. Umut > > All implementation details of kernel cgroups are no longer exposed in > systemd, which is a huge step forward, not back. > > Kay > _______________________________________________ > systemd-devel mailing list > [email protected] > http://lists.freedesktop.org/mailman/listinfo/systemd-devel _______________________________________________ systemd-devel mailing list [email protected] http://lists.freedesktop.org/mailman/listinfo/systemd-devel
