For requeue PI it's required to establish PI state for the PI futex to which waiters are requeued. This either acquires the user space futex on behalf of the top most waiter on the inner 'waitqueue' futex, or attaches to the PI state of an existing waiter, or creates on attached to the owner of the futex. This code can retry in case of failure, but retry can never happen when the pi state was successfully created. The condition to run this code is: (task_count - nr_wake) < nr_requeue which is always true because: task_count = 0 nr_wake = 1 nr_requeue >= 0 Remove it completely.
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| @@ -2000,7 +2000,7 @@ retry_private: · 1999 unmodified lines | |||
| 2000 | } | 2000 | } |
| 2001 | } | 2001 | } |
| 2002 | 2002 | ||
| 2003 | if (requeue_pi && (task_count - nr_wake < nr_requeue)) { | 2003 | if (requeue_pi) { |
| 2004 | struct task_struct *exiting = NULL; | 2004 | struct task_struct *exiting = NULL; |
| 2005 | 2005 | ||
| 2006 | /* | 2006 | /* |