WORKQUEUE_CONGESTED(9)                    Driver Basics                    WORKQUEUE_CONGESTED(9)



NAME
       workqueue_congested - test whether a workqueue is congested

SYNOPSIS
       bool workqueue_congested(int cpu, struct workqueue_struct * wq);

ARGUMENTS
       cpu
           CPU in question

       wq
           target workqueue

DESCRIPTION
       Test whether wq's cpu workqueue for cpu is congested. There is no synchronization around
       this function and the test result is unreliable and only useful as advisory hints or for
       debugging.

       If cpu is WORK_CPU_UNBOUND, the test is performed on the local CPU. Note that both per-cpu
       and unbound workqueues may be associated with multiple pool_workqueues which have separate
       congested states. A workqueue being congested on one CPU doesn't mean the workqueue is
       also contested on other CPUs / NUMA nodes.

RETURN
       true if congested, false otherwise.

COPYRIGHT
Kernel Hackers Manual 4.8.                 January 2017                    WORKQUEUE_CONGESTED(9)