linux - Explaining Workqueues, flags and how they fit into the kernel -


i've started reading workqueues , code involved create workqueues in linux kernel.

workqueues scheduling work on multiple cpus concurrently execute series of tasks based on queue.

we have create_*workqueue() depracated , being replaced alloc_*workqueue()

there couple of flags given in documentation on workqueues here. these flags used in alloc_*workqueue though read documentation provided linux kernel, i'm still little unclear on how wq_mem_reclaim flag works.

what queue_delayed_work(), __cancel_delayed_work() , mod_delayed_work() , how related or different create/alloc_*workqueue

note: i'm new linux kernel , have limited knowledge of operating systems, please bear me , explain in simplified version possible.


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