On Mon, Nov 25, 2013 at 09:09:40AM -0600, Serge Hallyn wrote: > Quoting Marian Marinov (m...@yuhu.biz): > > Hi guys, > > I'm using LXC containers for some of my teaching and I want to have > > /proc/cpuinfo and /proc/memory based on the cgroup > > limits that I have set. > > > > The idea is that if one container is limited to a cpuset of 0-1 it should > > see only the first two cores and not all the > > cores on the machine. > > > > The same thing is needed for the memory. > > > > I simply want my students see the actual resources that they have. > > > > Does any of you have any suggestions? > > > > I'm planning to patch the kernel. As far as I can see it, I need to patch > > the following files: > > ./tile/kernel/proc.c > > ./sh/kernel/cpu/proc.c > > ./x86/kernel/cpu/proc.c > > ./mips/kernel/proc.c > > > > Actually the c_start function. > > Hi, > > patching the kernel would be a good exercise. Historically that hasn't > been acceptable upstream - but then tastes and politics change pretty > frequently, and what was nacked one year can be enthusiastically > accepted two years later... > > now the alternative is to use fuse to have userspace change what is > shown in those files. Daniel Lezcano years ago had one working. The > code for that is up at https://github.com/hallyn/procfs, however it > won't work or even compile as is. But if you can whip that into a > working shape we could hopefully figure out how to ship it with lxc.
In libvirt we went the FUSE route for /proc/meminfo, given the kernel guys resistance to changing kernel code for this use case. Regards, Daniel -- |: http://berrange.com -o- http://www.flickr.com/photos/dberrange/ :| |: http://libvirt.org -o- http://virt-manager.org :| |: http://autobuild.org -o- http://search.cpan.org/~danberr/ :| |: http://entangle-photo.org -o- http://live.gnome.org/gtk-vnc :| ------------------------------------------------------------------------------ Shape the Mobile Experience: Free Subscription Software experts and developers: Be at the forefront of tech innovation. Intel(R) Software Adrenaline delivers strategic insight and game-changing conversations that shape the rapidly evolving mobile landscape. Sign up now. http://pubads.g.doubleclick.net/gampad/clk?id=63431311&iu=/4140/ostg.clktrk _______________________________________________ Lxc-devel mailing list Lxc-devel@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/lxc-devel
