How System Requests Work and How to Add Your Own SysReq
How System Requests Work and How to Add Your Own SysReq
I needed to add a custom System Request (Sys Req or SysRq) to a linux kernel some time ago. While doing so, I dug deep into how it works and I thought I’d make a quick post about it. Here is a good SuperUser answer about what a SysRq is. You may also know about SysRq via REISUB. This post has three ...
I love abusing sigusr1 and 2. Absolutely no confusion or shooting myself in the foot in 3 months when I forget what I did... No sir
What happened? You don't want to talk anymore? I thought you wanted to endlessly engage.
Dude(ette): You're following them around and bordering on harassment. Chill.
Let's talk about how I don't like Linus tech tips again. I know your can't wrap your mind around me having my own opinion and posting one sentence about it
THIS IS MUCH BETTER
Huh, I never actually gave any thought to how the SysRq key works. Interesting thing to learn after all these decades, heh
https://lwn.net/Articles/296738/
Unix internals is a great book! If you haven't had an occasion to read it, I can't recommend it highly enough. Similar to design of the BSD operating system, it goes into the internal data structures, but most importantly the rationale
I actually don't know nearly enough about OS design, and I've been toying with the idea of learning more for like 20 years now but never manage to get around to it. How's that book hold up, considering it was (apparently?) published in '96? I'd assume a lot of the basics are still the same, and since it's a book about the "evolution" of UNIX the historical parts will still be interesting in any case
Website owner is @ABasilPlant@lemmy.world
Thanks for cross-posting and tagging me 😄! Perhaps lemmy should push a notification if it's cross-posted.
You are welcome!