On Monday 29 October 2012 02:54:56 you wrote: > just for info the patches are still in process now. Saw that, I was proposing a different perspective, but - as I'm not a cgroup/kernel expert I really appreciate your opinions! Consider everything that follows as a imho/iirc/iiuc/whatever.
> The design of this feature is described e.g. in > http://sourceforge.net/mailarchive/forum.php?thread_name=502209A3.70809%40r > edhat.com&forum_name=libcg-devel That's a cgred feature: reads the template from config, then creates the relative cgroup. If I change the template will the already created cgroups be changed? I imagine a template group as a "real" cgroup (but with no /tasks assigned), listed in mounts, and dynamically modifiable via cgroup calls. Its subgroups inherit its settings. This would avoid the prolification of cgroups ensuring that a "pool" of groups has the same settings. A drawback is that it should be done in kernel space, but for what I saw I'm not sure it would be this complex (on that your knowledge would be helpful). Some cases follow. Case 1: create a template cgroup - it appears in /cgroup/mem_and_cpu/my_template - its limits are not enforced - it contains /cgroup/mem_and_cpu/my_template/template set to 1 - its tasks file is empty: /cgroup/mem_and_cpu/tasks - subgroups of template group inherit its settings Case 2: create a user subgroup of /cgroup/mem_and_cpu/my_template # mkdir /cgroup/mem_and_cpu/my_template/jon/ - my_template/jon inherit settings from my_template - resource counting is incremental instead of shared: - ex. a) my_template/blkio.weight=100 b) my_template/ has jon, mary subgroups c) then the real my_template/blkio.weight is 200 - ex. I can't edit my_template/jon/ settings directly Case 3: create a process subgroup of /cgroup/mem_and_cpu/my_template # mkdir /cgroup/mem_and_cpu/my_template/$PID - this could be done with your cgred patch too - all the processes inherit the my_template settings Hope do have been a bit more clear. In any case I'll appreciate your doubts, explainations and feedback (eg. "your idea sucks for the following reasons:") Thx again for your time + Peace, R. -- Roberto Polli Community Manager Babel S.r.l. - http://www.babel.it T: +39.06.9826.9651 M: +39.340.652.2736 F: +39.06.9826.9680 P.zza S.Benedetto da Norcia, 33 - 00040 Pomezia (Roma) CONFIDENZIALE: Questo messaggio ed i suoi allegati sono di carattere confidenziale per i destinatari in indirizzo. E' vietato l'inoltro non autorizzato a destinatari diversi da quelli indicati nel messaggio originale. Se ricevuto per errore, l'uso del contenuto e' proibito; si prega di comunicarlo al mittente e cancellarlo immediatamente. ------------------------------------------------------------------------------ The Windows 8 Center - In partnership with Sourceforge Your idea - your app - 30 days. Get started! http://windows8center.sourceforge.net/ what-html-developers-need-to-know-about-coding-windows-8-metro-style-apps/ _______________________________________________ Libcg-devel mailing list Libcg-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/libcg-devel
