Messages in this thread | | | Subject | Re: can I bring Linux down by running "renice -20 cpu_intensive_process"? | From | Måns Rullgård <> | Date | Sun, 12 Mar 2006 12:00:09 +0000 |
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Lee Revell <rlrevell@joe-job.com> writes:
> On Fri, 2006-03-10 at 22:01 +0000, 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. >> > > A nice -20 SCHED_OTHER task is not realtime, only SCHED_FIFO and > SCHED_RR.
Maybe extending sysrq+n to lower the priority of -20 tasks would be a good idea.
-- 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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