Misc typos in PREEMPT_RT course

[tpetazzoni]

List of issues/typos reported by Robert PJ Day:

17: "In [an] Realtime system,..."
25: "interrupted by an interruption" seems kind of redundant
29: "A low-priority task [migh] ..."
31: "interfers"
36: "Preempt-RT", I would always write as "PREEMPT_RT" for consistency
39: Not a typo but since you refer to the POSIX/Linux API for RT
programming,
it would be useful to add a link for that
48: "logging mechanism[s]"
48: "execution context[s]"
48: Again, I would use a consistent reference to "RT-patch"
49: "enqueues" -> "enqueue"
49: "IRQS_ONESHOT" -> "IRQF_ONESHOT" ????
49: "IRQF_NOTHREAD" ... there does not appear to be any such symbol in
the current
kernel, did you mean IRQ_NOTHREAD?
51: "Uncompatible" ... I would say "Incompatible"
53: I would title this slide, "no forced kernel preemption" so there is
no confusion
53: "hard to find" -> "hard-to-find"
56: "explicitely" -> "explicitly"
56: Since you mention Ubuntu 20.04 earlier, might be worth mentioning
real-time Ubuntu 22.04
in beta, https://ubuntu.com/blog/real-time-ubuntu-released
59: "Power-management features use[s] ..."
61: At some point, do you explain where to get "hwlatdetect"?
66: "Other Idle states can also exist[s], ..."
83: "rt-test" -> "rt-tests" ???
97: "Synchronisation mechanism that can deferred..." ????
97: "Deffered"
97: "preven"
99: I might mention that SCHED_NORMAL is another name for SCHED_OTHER.
Or it used to be.
113: "of a thread[s]"
117: "explicitely"

[realchrisolin]

Also worth noting that PREEMPT_RT was merged into the mainline kernel today.

torvalds/linux@baeb9a7