October 2017
Intermediate to advanced
354 pages
9h 28m
English
Content preview from Mastering Linux Kernel Development
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state
A process right from the time it is spawned until it exits may exist in various states, referred to as process states--they define the process’s current state:
- TASK_RUNNING (0): The task is either executing or contending for CPU in the scheduler run-queue.
- TASK_INTERRUPTIBLE (1): The task is in an interruptible wait state; it remains in wait until an awaited condition becomes true, such as the availability of mutual exclusion locks, device ready for I/O, lapse of sleep time, or an exclusive wake-up call. While in this wait state, any signals generated for the process are delivered, causing it to wake up before the wait condition is met.
- TASK_KILLABLE: This is similar to TASK_INTERRUPTIBLE, with the exception that interruptions can ...