On Tue, Feb 3, 2009 at 10:51 AM, sean finney <sean...@seanius.net> wrote: > On Tue, Feb 03, 2009 at 07:49:15PM +0100, Mike Hommey wrote: >> > Having one virtual filesystem mounted on top of another virtual >> > filesystem seems like a recipe for problems. >> >> Like with /sys/fs/fuse/connections ? Come on, there is no problem with a >> virtual filesystem mounted on top of another. > > or /proc/bus/usb or /dev/shm or /dev/pts... :) >
/dev is a bit different though - even if it's mounted as a udev fs, you can create a new directory in there to act as a mount point. Cgroups supports multiple hierarchies on different mount points. So if you have two cgroups hierarchies - say one for CPU/network and one for memory isolation, you could create /dev/cgroup/cpunet and /dev/cgroup/memory and mount the two hierarchies. But sysfs doesn't allow you to create new subdirectories to act as mountpoints. If we can have a /sys/cgroups directory which allows you to create arbitrary subdirs to act as mountpoints, that could be OK. Or just fake it by mounting a tmpfs on /sys/cgroups and then create mount points in there, but that seems like a bit of a hack. Paul -- To UNSUBSCRIBE, email to debian-devel-requ...@lists.debian.org with a subject of "unsubscribe". Trouble? Contact listmas...@lists.debian.org
