1. 13 Mar, 2009 1 commit
  2. 27 Feb, 2009 2 commits
  3. 30 Jan, 2009 2 commits
  4. 11 Jan, 2009 2 commits
  5. 11 Nov, 2008 1 commit
  6. 30 Oct, 2008 1 commit
  7. 27 Oct, 2008 3 commits
  8. 20 Oct, 2008 1 commit
    • Matt Helsley's avatar
      container freezer: implement freezer cgroup subsystem · dc52ddc0
      Matt Helsley authored
      This patch implements a new freezer subsystem in the control groups
      framework.  It provides a way to stop and resume execution of all tasks in
      a cgroup by writing in the cgroup filesystem.
      
      The freezer subsystem in the container filesystem defines a file named
      freezer.state.  Writing "FROZEN" to the state file will freeze all tasks
      in the cgroup.  Subsequently writing "RUNNING" will unfreeze the tasks in
      the cgroup.  Reading will return the current state.
      
      * Examples of usage :
      
         # mkdir /containers/freezer
         # mount -t cgroup -ofreezer freezer  /containers
         # mkdir /containers/0
         # echo $some_pid > /containers/0/tasks
      
      to get status of the freezer subsystem :
      
         # cat /containers/0/freezer.state
         RUNNING
      
      to freeze all tasks in the container :
      
         # echo FROZEN > /containers/0/freezer.state
         # cat /containers/0/freezer.state
         FREEZING
         # cat /containers/0/freezer.state
         FROZEN
      
      to unfreeze all tasks in the container :
      
         # echo RUNNING > /containers/0/freezer.state
         # cat /containers/0/freezer.state
         RUNNING
      
      This is the basic mechanism which should do the right thing for user space
      task in a simple scenario.
      
      It's important to note that freezing can be incomplete.  In that case we
      return EBUSY.  This means that some tasks in the cgroup are busy doing
      something that prevents us from completely freezing the cgroup at this
      time.  After EBUSY, the cgroup will remain partially frozen -- reflected
      by freezer.state reporting "FREEZING" when read.  The state will remain
      "FREEZING" until one of these things happens:
      
      	1) Userspace cancels the freezing operation by writing "RUNNING" to
      		the freezer.state file
      	2) Userspace retries the freezing operation by writing "FROZEN" to
      		the freezer.state file (writing "FREEZING" is not legal
      		and returns EIO)
      	3) The tasks that blocked the cgroup from entering the "FROZEN"
      		state disappear from the cgroup's set of tasks.
      
      [akpm@linux-foundation.org: coding-style fixes]
      [akpm@linux-foundation.org: export thaw_process]
      Signed-off-by: default avatarCedric Le Goater <clg@fr.ibm.com>
      Signed-off-by: default avatarMatt Helsley <matthltc@us.ibm.com>
      Acked-by: default avatarSerge E. Hallyn <serue@us.ibm.com>
      Tested-by: default avatarMatt Helsley <matthltc@us.ibm.com>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      dc52ddc0
  9. 15 Oct, 2008 1 commit
  10. 11 Oct, 2008 4 commits
  11. 05 Oct, 2008 1 commit
  12. 03 Oct, 2008 1 commit
  13. 05 Sep, 2008 1 commit
  14. 30 Jul, 2008 2 commits
  15. 25 Jul, 2008 1 commit
    • Michael Buesch's avatar
      gpiolib: allow user-selection · 7444a72e
      Michael Buesch authored
      This patch adds functionality to the gpio-lib subsystem to make it
      possible to enable the gpio-lib code even if the architecture code didn't
      request to get it built in.
      
      The archtitecture code does still need to implement the gpiolib accessor
      functions in its asm/gpio.h file.  This patch adds the implementations for
      x86 and PPC.
      
      With these changes it is possible to run generic GPIO expansion cards on
      every architecture that implements the trivial wrapper functions.  Support
      for more architectures can easily be added.
      Signed-off-by: default avatarMichael Buesch <mb@bu3sch.de>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Stephen Rothwell <sfr@canb.auug.org.au>
      Cc: David Brownell <david-b@pacbell.net>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Cc: Haavard Skinnemoen <hskinnemoen@atmel.com>
      Cc: Jesper Nilsson <jesper.nilsson@axis.com>
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Cc: Paul Mackerras <paulus@samba.org>
      Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
      Cc: Ingo Molnar <mingo@elte.hu>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Jean Delvare <khali@linux-fr.org>
      Cc: Samuel Ortiz <sameo@openedhand.com>
      Cc: Kumar Gala <galak@gate.crashing.org>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Cc: Adrian Bunk <bunk@stusta.de>
      Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7444a72e
  16. 20 Jul, 2008 2 commits
  17. 15 Jul, 2008 7 commits
  18. 03 Jul, 2008 1 commit
  19. 26 Jun, 2008 1 commit
    • Jens Axboe's avatar
      mips: convert to generic helpers for IPI function calls · 2f304c0a
      Jens Axboe authored
      This converts mips to use the new helpers for smp_call_function() and
      friends, and adds support for smp_call_function_single(). Not tested,
      but it compiles.
      
      mips shares the same IPI for smp_call_function() and
      smp_call_function_single(), since not all mips platforms have enough
      available IPIs to support seperate setups.
      
      Cc: Ralf Baechle <ralf@linux-mips.org>
      Signed-off-by: default avatarJens Axboe <jens.axboe@oracle.com>
      2f304c0a
  20. 28 Apr, 2008 5 commits