1. 03 7月, 2008 6 次提交
  2. 02 7月, 2008 10 次提交
  3. 01 7月, 2008 6 次提交
  4. 30 6月, 2008 17 次提交
  5. 29 6月, 2008 1 次提交
    • D
      sched: fix cpu hotplug · 79c53799
      Dmitry Adamushko 提交于
      the CPU hotplug problems (crashes under high-volume unplug+replug
      tests) seem to be related to migrate_dead_tasks().
      
      Firstly I added traces to see all tasks being migrated with
      migrate_live_tasks() and migrate_dead_tasks(). On my setup the problem
      pops up (the one with "se == NULL" in the loop of
      pick_next_task_fair()) shortly after the traces indicate that some has
      been migrated with migrate_dead_tasks()). btw., I can reproduce it
      much faster now with just a plain cpu down/up loop.
      
      [disclaimer] Well, unless I'm really missing something important in
      this late hour [/desclaimer] pick_next_task() is not something
      appropriate for migrate_dead_tasks() :-)
      
      the following change seems to eliminate the problem on my setup
      (although, I kept it running only for a few minutes to get a few
      messages indicating migrate_dead_tasks() does move tasks and the
      system is still ok)
      Signed-off-by: NIngo Molnar <mingo@elte.hu>
      79c53799