Messages in this thread | | | Subject | Re: Where is RLIMIT_RT_CPU? | From | Lee Revell <> | Date | Thu, 13 Jul 2006 12:43:59 -0400 |
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On Wed, 2006-07-12 at 10:23 +1000, Jean-Marc Valin wrote: > Hi, > > I saw many references to RLIMIT_RT_CPU (e.g. in > http://lwn.net/Articles/120797/ ) as a way of limiting the amount of CPU > an unprivileged task can use at real-time priority. My understand was > that the feature had been merged into 2.6.12 as part of Ingo's rt-limit > patches. Unfortunately, I can't find any reference to that on my system > (latest Ubuntu), so I'm wondering where it's gone. Has it been removed, > renamed, ...? Considering that Ubuntu Dapper currently allows any user > to make unlimited use of realtime scheduling, this feature would be > really useful to prevent user apps from accidently crashing the system.
It was not merged.
This problem should be addressed by a userspace RT watchdog. Ubuntu should not have shipped their system with unlimited non-root realtime enabled and no watchdog.
Lee
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