Re: Xterm Hangs - Possible scheduler defect?

[Chad N. Tindel]

> 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?

Chad
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