Re: [PATCH] sched: Update task->on_rq when tasks are moving between runqueues

From: Peter Zijlstra
Date: Sun Oct 25 2015 - 06:09:20 EST


On Sat, Oct 24, 2015 at 11:01:02AM -0700, Olav Haugan wrote:
> Task->on_rq has three states:
> 0 - Task is not on runqueue (rq)
> 1 (TASK_ON_RQ_QUEUED) - Task is on rq
> 2 (TASK_ON_RQ_MIGRATING) - Task is on rq but in the process of being
> migrated to another rq
>
> When a task is moving between rqs task->on_rq state should be
> TASK_ON_RQ_MIGRATING

Only when not holding both rq locks..
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