This is an update to the task containers patchset. Changes since V10 (May 30th) include:
- Based on 2.6.22-rc6-mm1 (minus existing container patches, see below) - Rolled in various fix/tidy patches contributed by akpm and others - Reorganisation of the mount/unmount code to use sget(); the new approach is modelled on the NFS superblock code. This fixes some potential lock inversions pointed out by lockdep. - Fix various lockdep warnings - Changed the create() subsystem callback to return a pointer to the new state object rather than updating the subsystem pointer in the container directly. - Changed container_add_file() to automatically prefix the subsystem name (and a period) on to all container files unless the filesystem is mounted with the "noprefix" option (intended for use by the legacy cpuset filesystem emulation). - Added a release_agent= mount option to allow the release agent path to be specified at mount time. - css_put() is now completely non-blocking - css_get()/css_put() avoid taking/dropping reference counts on the root state since this can't be freed anyway; this saves some atomic ops API changes (for subsystem writers): 1) return your new css object from create() callback 2) remove the subsystem name prefix from your cftype structures 3) pass your subsystem pointer as an additional new parameter to container_add_file() and container_add_files() Still TODO: - finalize the naming - add a hash-table based lookup for css_group objects. - use seq_file properly in container tasks files to avoid having to allocate a big array for all the container's task pointers. - add virtualization support to allow delegation to virtual servers - fix a lockdep false-positive - container_mutex nests inside inode->i_mutex, but there's a point in the mount code where we need to lock a newly-created (and hence guaranteed unlocked) directory from within container_mutex. - more subsystems Generic Process Containers -------------------------- There have recently been various proposals floating around for resource management/accounting and other task grouping subsystems in the kernel, including ResGroups, User BeanCounters, NSProxy containers, and others. These all need the basic abstraction of being able to group together multiple processes in an aggregate, in order to track/limit the resources permitted to those processes, or control other behaviour of the processes, and all implement this grouping in different ways. This patchset provides a framework for tracking and grouping processes into arbitrary "containers" and assigning arbitrary state to those groupings, in order to control the behaviour of the container as an aggregate. The intention is that the various resource management and virtualization/container efforts can also become task container clients, with the result that: - the userspace APIs are (somewhat) normalised - it's easier to test e.g. the ResGroups CPU controller in conjunction with the BeanCounters memory controller, or use either of them as the resource-control portion of a virtual server system. - the additional kernel footprint of any of the competing resource management systems is substantially reduced, since it doesn't need to provide process grouping/containment, hence improving their chances of getting into the kernel The patch set is structured as follows: 1) Basic container framework - filesystem and tracking structures 2) Support for the "tasks" control file 3) Hooks for fork() and exit() 4) Support for the container_clone() operation 5) Add /proc reporting interface 6) Share container subsystem pointer arrays between tasks with the same assignments 7) Support for a userspace "release agent", similar to the cpusets release agent functionality 8) Make cpusets a container subsystem 9) Simple CPU Accounting example subsystem 10) Simple container debugging subsystem It applies to 2.6.22-rc6-mm1, *minus* the following patches (available from http://www.kernel.org/pub/linux/kernel/people/akpm/mm/broken-out-2007-06-27-03-28.tar.gz) containersv10-basic-container-framework.patch containersv10-basic-container-framework-fix.patch containersv10-basic-container-framework-fix-2.patch containersv10-basic-container-framework-fix-3.patch containersv10-example-cpu-accounting-subsystem.patch containersv10-example-cpu-accounting-subsystem-fix.patch containersv10-add-tasks-file-interface.patch containersv10-add-tasks-file-interface-fix.patch containersv10-add-tasks-file-interface-fix-2.patch containersv10-add-fork-exit-hooks.patch containersv10-add-fork-exit-hooks-fix.patch containersv10-add-container_clone-interface.patch containersv10-add-container_clone-interface-fix.patch containersv10-add-procfs-interface.patch containersv10-add-procfs-interface-fix.patch containersv10-make-cpusets-a-client-of-containers.patch containersv10-make-cpusets-a-client-of-containers-whitespace.patch containersv10-share-css_group-arrays-between-tasks-with-same-container-memberships.patch containersv10-share-css_group-arrays-between-tasks-with-same-container-memberships-fix.patch containersv10-share-css_group-arrays-between-tasks-with-same-container-memberships-cpuset-zero-malloc-fix-for-new-containers.patch containersv10-simple-debug-info-subsystem.patch containersv10-simple-debug-info-subsystem-fix.patch containersv10-simple-debug-info-subsystem-fix-2.patch containersv10-support-for-automatic-userspace-release-agents.patch containersv10-support-for-automatic-userspace-release-agents-whitespace.patch add-containerstats-v3.patch add-containerstats-v3-fix.patch update-getdelays-to-become-containerstats-aware.patch containers-implement-subsys-post_clone.patch containers-implement-namespace-tracking-subsystem-v3.patch Signed-off-by: Paul Menage <[EMAIL PROTECTED]> -- ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. 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