1. 04 8月, 2016 1 次提交
  2. 18 3月, 2016 1 次提交
  3. 12 1月, 2016 1 次提交
  4. 17 11月, 2015 1 次提交
  5. 16 10月, 2015 1 次提交
    • T
      cgroup: add cgroup_subsys->free() method and use it to fix pids controller · afcf6c8b
      Tejun Heo 提交于
      pids controller is completely broken in that it uncharges when a task
      exits allowing zombies to escape resource control.  With the recent
      updates, cgroup core now maintains cgroup association till task free
      and pids controller can be fixed by uncharging on free instead of
      exit.
      
      This patch adds cgroup_subsys->free() method and update pids
      controller to use it instead of ->exit() for uncharging.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Cc: Aleksa Sarai <cyphar@cyphar.com>
      afcf6c8b
  6. 03 12月, 2014 1 次提交
  7. 09 7月, 2014 1 次提交
    • T
      cgroup: implement cgroup_subsys->css_reset() · b4536f0c
      Tejun Heo 提交于
      cgroup is implementing support for subsystem dependency which would
      require a way to enable a subsystem even when it's not directly
      configured through "cgroup.subtree_control".
      
      The previous patches added support for explicitly and implicitly
      enabled subsystems and showing/hiding their interface files.  An
      explicitly enabled subsystem may become implicitly enabled if it's
      turned off through "cgroup.subtree_control" but there are subsystems
      depending on it.  In such cases, the subsystem, as it's turned off
      when seen from userland, shouldn't enforce any resource control.
      Also, the subsystem may be explicitly turned on later again and its
      interface files should be as close to the intial state as possible.
      
      This patch adds cgroup_subsys->css_reset() which is invoked when a css
      is hidden.  The callback should disable resource control and reset the
      state to the vanilla state.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Acked-by: NLi Zefan <lizefan@huawei.com>
      Acked-by: NJohannes Weiner <hannes@cmpxchg.org>
      b4536f0c
  8. 23 11月, 2013 1 次提交
  9. 13 4月, 2013 1 次提交
  10. 11 4月, 2013 1 次提交
    • R
      cgroup: remove bind() method from cgroup_subsys. · 84cfb6ab
      Rami Rosen 提交于
      The bind() method of cgroup_subsys is not used in any of the
      controllers (cpuset, freezer, blkio, net_cls, memcg, net_prio,
      devices, perf, hugetlb, cpu and cpuacct)
      
      tj: Removed the entry on ->bind() from
          Documentation/cgroups/cgroups.txt.  Also updated a couple
          paragraphs which were suggesting that dynamic re-binding may be
          implemented.  It's not gonna.
      Signed-off-by: NRami Rosen <ramirose@gmail.com>
      Signed-off-by: NTejun Heo <tj@kernel.org>
      84cfb6ab
  11. 04 4月, 2013 1 次提交
  12. 13 3月, 2013 1 次提交
  13. 20 11月, 2012 3 次提交
  14. 14 9月, 2012 1 次提交
  15. 13 9月, 2012 1 次提交
  16. 18 7月, 2012 1 次提交
  17. 10 7月, 2012 1 次提交
  18. 07 6月, 2012 1 次提交
  19. 03 2月, 2012 1 次提交
    • L
      cgroup: remove cgroup_subsys argument from callbacks · 761b3ef5
      Li Zefan 提交于
      The argument is not used at all, and it's not necessary, because
      a specific callback handler of course knows which subsys it
      belongs to.
      
      Now only ->pupulate() takes this argument, because the handlers of
      this callback always call cgroup_add_file()/cgroup_add_files().
      
      So we reduce a few lines of code, though the shrinking of object size
      is minimal.
      
       16 files changed, 113 insertions(+), 162 deletions(-)
      
         text    data     bss     dec     hex filename
      5486240  656987 7039960 13183187         c928d3 vmlinux.o.orig
      5486170  656987 7039960 13183117         c9288d vmlinux.o
      Signed-off-by: NLi Zefan <lizf@cn.fujitsu.com>
      Signed-off-by: NTejun Heo <tj@kernel.org>
      761b3ef5
  20. 13 12月, 2011 2 次提交
  21. 05 11月, 2011 1 次提交
  22. 16 6月, 2011 2 次提交
  23. 27 5月, 2011 3 次提交
    • D
      cgroup: remove the ns_cgroup · a77aea92
      Daniel Lezcano 提交于
      The ns_cgroup is an annoying cgroup at the namespace / cgroup frontier and
      leads to some problems:
      
        * cgroup creation is out-of-control
        * cgroup name can conflict when pids are looping
        * it is not possible to have a single process handling a lot of
          namespaces without falling in a exponential creation time
        * we may want to create a namespace without creating a cgroup
      
        The ns_cgroup was replaced by a compatibility flag 'clone_children',
        where a newly created cgroup will copy the parent cgroup values.
        The userspace has to manually create a cgroup and add a task to
        the 'tasks' file.
      
      This patch removes the ns_cgroup as suggested in the following thread:
      
      https://lists.linux-foundation.org/pipermail/containers/2009-June/018616.html
      
      The 'cgroup_clone' function is removed because it is no longer used.
      
      This is a userspace-visible change.  Commit 45531757 ("cgroup: notify
      ns_cgroup deprecated") (merged into 2.6.27) caused the kernel to emit a
      printk warning users that the feature is planned for removal.  Since that
      time we have heard from XXX users who were affected by this.
      Signed-off-by: NDaniel Lezcano <daniel.lezcano@free.fr>
      Signed-off-by: NSerge E. Hallyn <serge.hallyn@canonical.com>
      Cc: Eric W. Biederman <ebiederm@xmission.com>
      Cc: Jamal Hadi Salim <hadi@cyberus.ca>
      Reviewed-by: NLi Zefan <lizf@cn.fujitsu.com>
      Acked-by: NPaul Menage <menage@google.com>
      Acked-by: NMatt Helsley <matthltc@us.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a77aea92
    • B
      cgroups: make procs file writable · 74a1166d
      Ben Blum 提交于
      Make procs file writable to move all threads by tgid at once.
      
      Add functionality that enables users to move all threads in a threadgroup
      at once to a cgroup by writing the tgid to the 'cgroup.procs' file.  This
      current implementation makes use of a per-threadgroup rwsem that's taken
      for reading in the fork() path to prevent newly forking threads within the
      threadgroup from "escaping" while the move is in progress.
      Signed-off-by: NBen Blum <bblum@andrew.cmu.edu>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Matt Helsley <matthltc@us.ibm.com>
      Reviewed-by: NPaul Menage <menage@google.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: David Rientjes <rientjes@google.com>
      Cc: Miao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      74a1166d
    • B
      cgroups: add per-thread subsystem callbacks · f780bdb7
      Ben Blum 提交于
      Add cgroup subsystem callbacks for per-thread attachment in atomic contexts
      
      Add can_attach_task(), pre_attach(), and attach_task() as new callbacks
      for cgroups's subsystem interface.  Unlike can_attach and attach, these
      are for per-thread operations, to be called potentially many times when
      attaching an entire threadgroup.
      
      Also, the old "bool threadgroup" interface is removed, as replaced by
      this.  All subsystems are modified for the new interface - of note is
      cpuset, which requires from/to nodemasks for attach to be globally scoped
      (though per-cpuset would work too) to persist from its pre_attach to
      attach_task and attach.
      
      This is a pre-patch for cgroup-procs-writable.patch.
      Signed-off-by: NBen Blum <bblum@andrew.cmu.edu>
      Cc: "Eric W. Biederman" <ebiederm@xmission.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Matt Helsley <matthltc@us.ibm.com>
      Reviewed-by: NPaul Menage <menage@google.com>
      Cc: Oleg Nesterov <oleg@redhat.com>
      Cc: David Rientjes <rientjes@google.com>
      Cc: Miao Xie <miaox@cn.fujitsu.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      f780bdb7
  24. 05 4月, 2011 1 次提交
  25. 17 3月, 2011 1 次提交
  26. 14 1月, 2011 1 次提交
  27. 28 10月, 2010 1 次提交
    • D
      cgroup: add clone_children control file · 97978e6d
      Daniel Lezcano 提交于
      The ns_cgroup is a control group interacting with the namespaces.  When a
      new namespace is created, a corresponding cgroup is automatically created
      too.  The cgroup name is the pid of the process who did 'unshare' or the
      child of 'clone'.
      
      This cgroup is tied with the namespace because it prevents a process to
      escape the control group and use the post_clone callback, so the child
      cgroup inherits the values of the parent cgroup.
      
      Unfortunately, the more we use this cgroup and the more we are facing
      problems with it:
      
      (1) when a process unshares, the cgroup name may conflict with a
          previous cgroup with the same pid, so unshare or clone return -EEXIST
      
      (2) the cgroup creation is out of control because there may have an
          application creating several namespaces where the system will
          automatically create several cgroups in his back and let them on the
          cgroupfs (eg.  a vrf based on the network namespace).
      
      (3) the mix of (1) and (2) force an administrator to regularly check
          and clean these cgroups.
      
      This patchset removes the ns_cgroup by adding a new flag to the cgroup and
      the cgroupfs mount option.  It enables the copy of the parent cgroup when
      a child cgroup is created.  We can then safely remove the ns_cgroup as
      this flag brings a compatibility.  We have now to manually create and add
      the task to a cgroup, which is consistent with the cgroup framework.
      
      This patch:
      
      Sent as an answer to a previous thread around the ns_cgroup.
      
      https://lists.linux-foundation.org/pipermail/containers/2009-June/018627.html
      
      It adds a control file 'clone_children' for a cgroup.  This control file
      is a boolean specifying if the child cgroup should be a clone of the
      parent cgroup or not.  The default value is 'false'.
      
      This flag makes the child cgroup to call the post_clone callback of all
      the subsystem, if it is available.
      
      At present, the cpuset is the only one which had implemented the
      post_clone callback.
      
      The option can be set at mount time by specifying the 'clone_children'
      mount option.
      Signed-off-by: NDaniel Lezcano <daniel.lezcano@free.fr>
      Signed-off-by: NSerge E. Hallyn <serge.hallyn@canonical.com>
      Cc: Eric W. Biederman <ebiederm@xmission.com>
      Acked-by: NPaul Menage <menage@google.com>
      Reviewed-by: NLi Zefan <lizf@cn.fujitsu.com>
      Cc: Jamal Hadi Salim <hadi@cyberus.ca>
      Cc: Matt Helsley <matthltc@us.ibm.com>
      Acked-by: NBalbir Singh <balbir@linux.vnet.ibm.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      97978e6d
  28. 28 5月, 2010 1 次提交
  29. 25 4月, 2010 1 次提交
  30. 16 3月, 2010 1 次提交
  31. 13 3月, 2010 4 次提交
    • K
      cgroup: implement eventfd-based generic API for notifications · 0dea1168
      Kirill A. Shutemov 提交于
      This patchset introduces eventfd-based API for notifications in cgroups
      and implements memory notifications on top of it.
      
      It uses statistics in memory controler to track memory usage.
      
      Output of time(1) on building kernel on tmpfs:
      
      Root cgroup before changes:
      	make -j2  506.37 user 60.93s system 193% cpu 4:52.77 total
      Non-root cgroup before changes:
      	make -j2  507.14 user 62.66s system 193% cpu 4:54.74 total
      Root cgroup after changes (0 thresholds):
      	make -j2  507.13 user 62.20s system 193% cpu 4:53.55 total
      Non-root cgroup after changes (0 thresholds):
      	make -j2  507.70 user 64.20s system 193% cpu 4:55.70 total
      Root cgroup after changes (1 thresholds, never crossed):
      	make -j2  506.97 user 62.20s system 193% cpu 4:53.90 total
      Non-root cgroup after changes (1 thresholds, never crossed):
      	make -j2  507.55 user 64.08s system 193% cpu 4:55.63 total
      
      This patch:
      
      Introduce the write-only file "cgroup.event_control" in every cgroup.
      
      To register new notification handler you need:
      - create an eventfd;
      - open a control file to be monitored. Callbacks register_event() and
        unregister_event() must be defined for the control file;
      - write "<event_fd> <control_fd> <args>" to cgroup.event_control.
        Interpretation of args is defined by control file implementation;
      
      eventfd will be woken up by control file implementation or when the
      cgroup is removed.
      
      To unregister notification handler just close eventfd.
      
      If you need notification functionality for a control file you have to
      implement callbacks register_event() and unregister_event() in the
      struct cftype.
      
      [kamezawa.hiroyu@jp.fujitsu.com: Kconfig fix]
      Signed-off-by: NKirill A. Shutemov <kirill@shutemov.name>
      Reviewed-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Paul Menage <menage@google.com>
      Cc: Li Zefan <lizf@cn.fujitsu.com>
      Cc: Balbir Singh <balbir@linux.vnet.ibm.com>
      Cc: Pavel Emelyanov <xemul@openvz.org>
      Cc: Dan Malek <dan@embeddedalley.com>
      Cc: Vladislav Buzov <vbuzov@embeddedalley.com>
      Cc: Daisuke Nishimura <nishimura@mxp.nes.nec.co.jp>
      Cc: Alexander Shishkin <virtuoso@slind.org>
      Cc: Davide Libenzi <davidel@xmailserver.org>
      Signed-off-by: NKAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      0dea1168
    • K
      cgroups: fix CONTENTS in cgroups documentation · 8ca712ea
      Kirill A. Shutemov 提交于
      Add a forgotten item into CONTENTS.
      Signed-off-by: NKirill A. Shutemov <kirill@shutemov.name>
      Acked-by: NPaul Menage <menage@google.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      8ca712ea
    • B
      cgroups: subsystem module unloading · cf5d5941
      Ben Blum 提交于
      Provides support for unloading modular subsystems.
      
      This patch adds a new function cgroup_unload_subsys which is to be used
      for removing a loaded subsystem during module deletion.  Reference
      counting of the subsystems' modules is moved from once (at load time) to
      once per attached hierarchy (in parse_cgroupfs_options and
      rebind_subsystems) (i.e., 0 or 1).
      Signed-off-by: NBen Blum <bblum@andrew.cmu.edu>
      Acked-by: NLi Zefan <lizf@cn.fujitsu.com>
      Cc: Paul Menage <menage@google.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      cf5d5941
    • B
      cgroups: subsystem module loading interface · e6a1105b
      Ben Blum 提交于
      Add interface between cgroups subsystem management and module loading
      
      This patch implements rudimentary module-loading support for cgroups -
      namely, a cgroup_load_subsys (similar to cgroup_init_subsys) for use as a
      module initcall, and a struct module pointer in struct cgroup_subsys.
      
      Several functions that might be wanted by modules have had EXPORT_SYMBOL
      added to them, but it's unclear exactly which functions want it and which
      won't.
      Signed-off-by: NBen Blum <bblum@andrew.cmu.edu>
      Acked-by: NLi Zefan <lizf@cn.fujitsu.com>
      Cc: Paul Menage <menage@google.com>
      Cc: "David S. Miller" <davem@davemloft.net>
      Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      e6a1105b