#rcu — Public Fediverse posts

@paulmckrcu
Azul has the C4 GC which (I think) uses virtual memory mapping to implement the GC read barrier.

#RCU doesn't do compacting reclamation so memory fragmentation would kill you. But if you had a data structure what didn't do that, like a Michael-Scott #lockfree queue, you could use mmap memory protection to trap any stale references, trap the segfault to restart a restartable RCU locked region.

Ah, insightful and lesson 👍

cc: Paul McKenney ....thanks a bunch!

@paulmckrcu

#rcu #pointer #linuxkernel #opensource #operatingsystem #programming

https://people.kernel.org/paulmck/what-on-earth-does-lifetime-end-pointer-zap-have-to-do-with-rcu

Cooooooooool !!

#linuxkernel #opensourcedevelopment #operatingsystem #rcu

https://www.phoronix.com/news/Linux-6.16-Hard-Soft-Lockups

/* Don't even think about trying any of these in real life!!! The names includes "busted", and they really means it! The only purpose of these functions is to provide a buggy RCU implementation to make sure that rcutorture correctly emits buggy-RCU error messages. */

https://elixir.bootlin.com/linux/v6.14.6/source/kernel/rcu/rcutorture.c#L621-L627

#linux #kernel #rcu

So I bought a #remarkable pro. Really looking forward to it. I really love the #remarkable 2 and the pro seems to work with #rcu. will arrive on thuesday

“Garbage Collection for Systems Programmers” [2023], Matt Kline (https://bitbashing.io/gc-for-systems-programmers.html).

Via HN: https://news.ycombinator.com/item?id=39873692

On Lobsters: https://lobste.rs/s/gpb0qh/garbage_collection_for_systems

#MemoryManagement #GarbageCollection #Kernel #SystemsProgramming #OS #GC #RCU #Concurrency

Reading a dense conversation between two #linux #kernel experts ...and pulling my head hair for my lack of understanding ....although the conversation discloses few key details ....TIL few ....
@paulmckrcu & tglx (Thomas Glexiner)

#RCU #preemption #cpu #linuxkernel

Next in our #EverythingOpen Speaker Spotlight series, we have @paulmckrcu, Boqun Feng, Frédéric Weisbecker @joel_linux, Neeraj Upadhyay and Uladzislau Rezki talking about new #RCU features in the #linux #kernel

https://2023.everythingopen.au/schedule/presentation/46/

You had rbtrees at uni? Let's throw #rcu in the mix and go. Though I wonder if a modern OS course wouldn't already cover #rcu in complex data structures?

Non-trivial data structures become infinitely more fun as soon as #rcu is involved (if fun means terrifying).