1. 29 Jun, 2010 11 commits
    • Tejun Heo's avatar
      workqueue: kill cpu_populated_map · 1537663f
      Tejun Heo authored
      Worker management is about to be overhauled.  Simplify things by
      removing cpu_populated_map, creating workers for all possible cpus and
      making single threaded workqueues behave more like multi threaded
      ones.
      
      After this patch, all cwqs are always initialized, all workqueues are
      linked on the workqueues list and workers for all possibles cpus
      always exist.  This also makes CPU hotplug support simpler - checking
      ->cpus_allowed before processing works in worker_thread() and flushing
      cwqs on CPU_POST_DEAD are enough.
      
      While at it, make get_cwq() always return the cwq for the specified
      cpu, add target_cwq() for cases where single thread distinction is
      necessary and drop all direct usage of per_cpu_ptr() on wq->cpu_wq.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      1537663f
    • Tejun Heo's avatar
      workqueue: temporarily remove workqueue tracing · 64166699
      Tejun Heo authored
      Strip tracing code from workqueue and remove workqueue tracing.  This
      is temporary measure till concurrency managed workqueue is complete.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Frederic Weisbecker <fweisbec@gmail.com>
      64166699
    • Tejun Heo's avatar
      workqueue: separate out process_one_work() · a62428c0
      Tejun Heo authored
      Separate out process_one_work() out of run_workqueue().  This patch
      doesn't cause any behavior change.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      a62428c0
    • Tejun Heo's avatar
      workqueue: define masks for work flags and conditionalize STATIC flags · 22df02bb
      Tejun Heo authored
      Work flags are about to see more traditional mask handling.  Define
      WORK_STRUCT_*_BIT as the bit position constant and redefine
      WORK_STRUCT_* as bit masks.  Also, make WORK_STRUCT_STATIC_* flags
      conditional
      
      While at it, re-define these constants as enums and use
      WORK_STRUCT_STATIC instead of hard-coding 2 in
      WORK_DATA_STATIC_INIT().
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      22df02bb
    • Tejun Heo's avatar
      workqueue: merge feature parameters into flags · 97e37d7b
      Tejun Heo authored
      Currently, __create_workqueue_key() takes @singlethread and
      @freezeable paramters and store them separately in workqueue_struct.
      Merge them into a single flags parameter and field and use
      WQ_FREEZEABLE and WQ_SINGLE_THREAD.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      97e37d7b
    • Tejun Heo's avatar
      workqueue: misc/cosmetic updates · 4690c4ab
      Tejun Heo authored
      Make the following updates in preparation of concurrency managed
      workqueue.  None of these changes causes any visible behavior
      difference.
      
      * Add comments and adjust indentations to data structures and several
        functions.
      
      * Rename wq_per_cpu() to get_cwq() and swap the position of two
        parameters for consistency.  Convert a direct per_cpu_ptr() access
        to wq->cpu_wq to get_cwq().
      
      * Add work_static() and Update set_wq_data() such that it sets the
        flags part to WORK_STRUCT_PENDING | WORK_STRUCT_STATIC if static |
        @extra_flags.
      
      * Move santiy check on work->entry emptiness from queue_work_on() to
        __queue_work() which all queueing paths share.
      
      * Make __queue_work() take @cpu and @wq instead of @cwq.
      
      * Restructure flush_work() and __create_workqueue_key() to make them
        easier to modify.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      4690c4ab
    • Tejun Heo's avatar
      workqueue: kill RT workqueue · c790bce0
      Tejun Heo authored
      With stop_machine() converted to use cpu_stop, RT workqueue doesn't
      have any user left.  Kill RT workqueue support.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      c790bce0
    • Tejun Heo's avatar
      acpi: use queue_work_on() instead of binding workqueue worker to cpu0 · 8fec62b2
      Tejun Heo authored
      ACPI works need to be executed on cpu0 and acpi/osl.c achieves this by
      creating singlethread workqueue and then binding it to cpu0 from a
      work which is quite unorthodox.  Make it create regular workqueues and
      use queue_work_on() instead.  This is in preparation of concurrency
      managed workqueue and the extra workers won't be a problem after it's
      implemented.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      8fec62b2
    • Tejun Heo's avatar
      kthread: implement kthread_data() · 82805ab7
      Tejun Heo authored
      Implement kthread_data() which takes @task pointing to a kthread and
      returns @data specified when creating the kthread.  The caller is
      responsible for ensuring the validity of @task when calling this
      function.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      82805ab7
    • Tejun Heo's avatar
      ivtv: use kthread_worker instead of workqueue · 7bc46560
      Tejun Heo authored
      Upcoming workqueue updates will no longer guarantee fixed workqueue to
      worker kthread association, so giving RT priority to the irq worker
      won't work.  Use kthread_worker which guarantees specific kthread
      association instead.  This also makes setting the priority cleaner.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Andy Walls <awalls@md.metrocast.net>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      Cc: ivtv-devel@ivtvdriver.org
      Cc: linux-media@vger.kernel.org
      7bc46560
    • Tejun Heo's avatar
      kthread: implement kthread_worker · b56c0d89
      Tejun Heo authored
      Implement simple work processor for kthread.  This is to ease using
      kthread.  Single thread workqueue used to be used for things like this
      but workqueue won't guarantee fixed kthread association anymore to
      enable worker sharing.
      
      This can be used in cases where specific kthread association is
      necessary, for example, when it should have RT priority or be assigned
      to certain cgroup.
      Signed-off-by: default avatarTejun Heo <tj@kernel.org>
      Cc: Andrew Morton <akpm@linux-foundation.org>
      b56c0d89
  2. 13 Jun, 2010 1 commit
  3. 12 Jun, 2010 1 commit
  4. 11 Jun, 2010 27 commits