f0d8bb26b4
Adds a task queue to receive tasks dispatched with TQ_FRONT. Worker threads pull tasks from this high priority queue before the default pending queue. Executing tasks out of FIFO order potentially breaks taskq_lowest_id() if we do not preserve the ordering of the work list by taskqid. Therefore, instead of always appending to the work list, we search for the appropriate place to insert a task. The common case is to append to the list, so we make this operation efficient by searching the work list in reverse order. Signed-off-by: Brian Behlendorf <behlendorf1@llnl.gov> |
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