Messages in this thread | | | Date | Tue, 11 Jan 2005 12:50:08 -0800 | From | Chris Wright <> | Subject | Re: [PATCH] [request for inclusion] Realtime LSM |
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* Matt Mackall (mpm@selenic.com) wrote: > On Tue, Jan 11, 2005 at 08:05:08AM -0500, Paul Davis wrote: > > I am not sure what you mean here. I think we've established that > > SCHED_OTHER cannot be made adequate for realtime audio work. Its > > intended purpose (timesharing the machine in ways that should > > generally benefit tasks that don't do a lot and/or are dominated by > > user interaction, thus rendering the machine apparently responsive) is > > really at odds with what we need. > > We have not established that at all. In principle, because SCHED_OTHER > tasks running at full priority lie on the boundary between SCHED_OTHER > and SCHED_FIFO, they can be made to run arbitrarily close to the > performance of tasks in SCHED_FIFO. With the upside that they won't be > able to deadlock the machine.
I don't think they lie quite so neatly on this boundary. There's one fundamental difference which is how the dynamic priority is adjusted which alters the basic preemptibility rules.
thanks, -chris -- Linux Security Modules http://lsm.immunix.org http://lsm.bkbits.net - 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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