Messages in this thread | | | From | "Stephen C. Tweedie" <> | Date | Fri, 23 Jul 1999 17:21:03 +0100 (BST) | Subject | Re: low priority soft RT? |
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Hi,
On Thu, 22 Jul 1999 21:39:48 +0200 (CEST), Rik van Riel <riel@nl.linux.org> said:
> I have made a fairly substantial SCHED_IDLE patch, but due to > the (never resolved) deadlock issues I haven't submitted it.
Yes, it really is a loaded gun. A large SCHED_IDLE process can consume arbitrary system resources, and if there is any single cpu-bound process preventing it from being scheduled, you won't even be able to kill -9 the SCHED_IDLE task (the kill signal isn't delivered until the task is next scheduled).
It is much more dangerous than it first appears, and the DoS attacks look really nasty.
--Stephen
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