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<H1>[Mageia-dev] cgroup on the desktop</H1>
<B>Robert Fox</B>
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TITLE="[Mageia-dev] cgroup on the desktop">list at foxconsult.net
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<I>Wed Mar 21 17:32:18 CET 2012</I>
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<PRE>On Wed, 2012-03-21 at 16:24 +0000, Colin Guthrie wrote:
><i> 'Twas brillig, and Robert Fox at 20/03/12 08:13 did gyre and gimble:
</I>><i> > Tried to research it, but it look more like it is for servers than
</I>><i> > desktop. Could someone explain what the value-add is of using this on
</I>><i> > the desktop?
</I>><i>
</I>><i> As used in the context of systemd just a general mechanism for tracking
</I>><i> processes. In the olden days, a service could exec other binaries quite
</I>><i> happily. Killing the primary pid of the service meant that any other
</I>><i> binaries launched were not necessarily killed. This mean that the
</I>><i> service needed to implement it's own accounting and tracking system and
</I>><i> there was no way to properly track to what service a given processes
</I>><i> belongs.
</I>><i>
</I>><i> Now with cgroups, it's possible to fully track all the processes started
</I>><i> by a given service and kill each of them properly when stopping the service.
</I>><i>
</I>><i> In addition it's also possible to identify to which service a given
</I>><i> process belongs. e.g. if something is spinning out of control you can
</I>><i> see it in top and then trace it back to the service itself.
</I>><i>
</I>><i> There are numerous other things that can be done with cgroups such as
</I>><i> imposing various limits on a given service (and any subsequent processes
</I>><i> it spawns).
</I>><i>
</I>><i>
</I>><i> Overall this is an accounting mechanism that is something very much
</I>><i> baked into systemd. It's an integral part of it. It's not something we
</I>><i> could simply "turn off" on desktops vs. servers.
</I>><i>
</I>><i>
</I>><i> However, this isn't really the right place to discuss this topic.
</I>><i>
</I>><i> Col
</I>><i>
</I>
Thanks Col - very informative and helpful!
Cheers,
Robert
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