Uninterruptible sleep
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In computer operating systems terminology, a sleeping process can either be interruptible (woken via signals) or uninterruptible (woken explicitly). An uninterruptible sleep state is a sleep state that cannot handle a signal (such as waiting for disk or network IO (input/output)).
When the process is sleeping uninterruptibly, the signal will be noticed when the process returns from the system call or trap.
[edit] See also
[edit] External links
- Unix source tree: Net2Kern/kern/kern_sig.c
- NetBSD Kernel Developer's Manual - SIGNAL(9) man page
- killing a process in an uninterruptable sleep state
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