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SubjectRe: can I bring Linux down by running "renice -20 cpu_intensive_process"?
Jeffrey Hundstad <> writes:

> Måns Rullgård wrote:
>>Jan Engelhardt <> writes:
>>>>Subject: can I bring Linux down by running "renice -20
>>> Depends on what the cpu_intensive_process does. If it tries to
>>> allocate lots of memory, maybe. If it's _just_ CPU (as in `perl -e
>>> '1 while 1'`), you get a chance that you can input some commands on
>>> a terminal to kill it.
>>>SCHED_FIFO'ing or SCHED_RR'ing such a process is sudden death of course.
>>Sysrq+n changes all realtime tasks to normal priority.
> Patient: "Doctor When I poke myself in the eye it hurts."
> Doctor "Don't do that then."

A bug might cause an otherwise well-behaved realtime process to start
spinning in a loop or something. Having a way to stop it is good,

Måns Rullgård
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