Messages in this thread |  | | | Subject | Re: can I bring Linux down by running "renice -20 cpu_intensive_process"? | | From | Måns Rullgård <> | | Date | Sat, 11 Mar 2006 10:42:27 +0000 |
Jeffrey Hundstad <jeffrey.hundstad@mnsu.edu> writes:
> Måns Rullgård wrote: > >>Jan Engelhardt <jengelh@linux01.gwdg.de> writes: >> >>>>Subject: can I bring Linux down by running "renice -20 >>>>cpu_intensive_process"? >>>> >>> 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, IMHO.
-- Måns Rullgård mru@inprovide.com - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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