can you tell me some simple example of “uninterruptible sleep” state? I'm learning unix and example with NFS is not much obvious for me.


1 Answer 1


The difference between interruptible and uninterruptible sleep is that the latter ignores signals:

Linux has two fundamental ways in which a process can be put to sleep. A process which is placed in the TASK_INTERRUPTIBLE state will sleep until either (1) something explicitly wakes it up, or (2) a non-masked signal is received. The TASK_UNINTERRUPTIBLE state, instead, ignores signals; processes in that state will require an explicit wakeup before they can run again.


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