Deadlock problems with 'kill PID' on CURRENT

[David G. Lawrence]

> Okay, trying to see the purpose of this button ?
> 
> Why have an NMI button to break into DDB when you can just use CTRL-ALT-ESC ?

   NMI is "Non Maskable Interrupt", which means that it cannot be blocked
by the OS. Keyboard interrupts can be blocked (masked), and thus may not
work under some conditions - especially while the kernel is already
processing an interrupt.

-DG

David G. Lawrence
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