Linux kernel 2.6.25 introduced a new process state for putting processes to sleep called TASK_KILLABLE, which offers an alternative to the efficient but potentially unkillable TASK_UNINTERRUPTIBLE & the easy-to-awaken but safer TASK_INTERRUPTIBLE.In this article, the author sheds light on this area and,using examples from 2.6.26 and earlier version
Get the low-down here:
http://www.ibm.com/developerworks/linux/library/l-task-killable/index.html
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