On 11/25/2013 05:12 PM, Daniel P. Berrange wrote: > 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.
Thank you for the good pointers. In my case I think it will be better to support a kernel patch for the kernel. But I would also try the procfs. It is always a good idea to try to convince the kernel devs that something is useful :) > > Regards, > Daniel > ------------------------------------------------------------------------------ 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
