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Re: cgroups etc (WAS: Re: Enabling the memory controller for F11)



* Linus Walleij <triad df lth se> [2008-12-08 23:08:51]:

> mån 2008-12-08 klockan 07:45 -0800 skrev John Reiser:
> 
> > > [Please] enable the memory controller for F11.
> > 
> > Please give a URL to a description of what it does,
> 
> Memory controllers rock:
> http://lxr.linux.no/linux/Documentation/controllers/memory.txt
>

Thanks! Good to know
 
> Lots of links there in the end.
> 
> On servers memory cgroups taken together with the existing CPU slicing
> cgroups and affinity cgroups enables the same stuff that Solaris "zones"
> (http://en.wikipedia.org/wiki/Solaris_Containers) does, more or less,
> but actually better because it's more fine-grained and doesn't need you
> to configure an entire virtual machine.
> 
> Instead of limiting this one virtual machine, the cgroups features make
> it possible to limit this one group of processes, without any
> virtualization overhead. I guess you could combine it with User Mode
> Linux if you want real, constrained virtualization.
> 
> cgroups are really a core killer feature in Linux, just that the rest of
> the world doesn't quite know yet, nor do userspace know quite how to
> handle all the nice cgroups, but much is happening right now.
> 

Yes a core killer feature and we have libcgroup to help
program/control from userspace. We already the package in F10.

> Even if servers is what most cgroup authors probably have in mind, they
> are equally useful to desktops and embedded systems.

-- 
	Balbir


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