Messages in this thread | | | Date | Thu, 24 Feb 2005 00:26:30 -0500 | From | "Chad N. Tindel" <> | Subject | Re: Xterm Hangs - Possible scheduler defect? |
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> But the other side of the coin is that a SCHED_FIFO userspace task > presumably has extreme latency requirements, so it doesn't *want* to be > preempted by some routine kernel operation. People would get irritated if > we were to do that.
Just to follow up a bit. People writing apps that run at SCHED_FIFO know that they aren't getting hard real-time, and they are OK with that. If they wanted something more they'd run on RTLinux. Why would it be wrong to preempt the SCHED_FIFO process in the case, assuming that it is too hard to fix a broken design that doesn't allow the necessary kernel threads to run on any CPU?
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