Top all-time · #11403
Con Kolivas
Personal blog · ck-hack.blogspot.comsystemsprogramming
Con Kolivas writes -ck hacking, a personal blog at ck-hack.blogspot.com about systems and programming. Since 2011, 7 different Hacker News readers have linked it 7 times, most often “I will have to sadly declare 5.12-ck the last of the MuQSS and -ck patches”. It is still writing: the last post was on 2026-10-19, and you can follow it by feed.
Too few sampled comments (3) to say how often HN recommends it.?
Why HN links it
Con Kolivas's blog on Linux kernel CPU scheduler work, including his out-of-tree -ck patches and the MuQSS scheduler. HN commenters cite it as background; none comment on the writing itself.
Summarised by Claude from a sample of 3 HN comments that link here. Each comment is marked recommending, critical or neutral (citing without judging); how this works.
A development blog of what Con Kolivas is doing with code at the moment with the emphasis on linux kernel, MuQSS, BFS and -ck.
Most-linked posts?
- I will have to sadly declare 5.12-ck the last of the MuQSS and -ck patches2 people · 2 mentions · first linked 2021-08-31
What Hacker News says?
I wonder if they are discouraged by the experience of Con Kolivas[1] who proposed an alternative scheduler back in 2007. (Apparently he is still maintaining his "-ck" fork of the linux kernel[2]!) I only mention this as a historical case that has remained in my memory. Maybe Linus is willing to revisit the issue, I don't follow LKML. [1] https://en.wikipedia.org/wiki/Con_Kolivas [2] http://ck-hack.blogspot.com/2015/…
Comment linking /2015/12/bfs-467-linux-43-ck3.html
on “The Linux Scheduler: A Decade of Wasted Cores [pdf]”Submitted SMT/Hyperthreading, nice and scheduling policies as a story · 3 points
HN discussionThat's Con Kolivas. It wasn't merged, he maintained patches out of tree until recently[0]. A pity as latency doesn't seem like a high priority for Linux. Strictly speaking a real-time OS isn't about that though, that's about bounded latency, not low latency. [0] http://ck-hack.blogspot.com/2021/08/514-and-future-of-muqss-...
Comment linking /2021/08/514-and-future-of-muqss-and-ck-once.html
on “Intel energizes decades-old real-time Linux kernel project”Submitted Anatomy of a software engineer reject as a story · 3 points
HN discussionWeird, the measurement scale they use does not jive with the scale of the knobs being tweaked. For example, `sched_cfs_bandwidth_slice_us` is adjusted by the project's `bandwidth_size` knob. The default is 5000 us, or 5 ms. But the knob they mention it being '5 us'. Same goes for scheduling latency-- its not `us`, its `ms`. And afaik, the 'sauce' used in Liquorix is MuQSS, by Con Kolivas. But the project has been pu…
Comment linking /2021/08/514-and-future-of-muqss-and-ck-once.html
on “Ask HN: Is there any tool for benchmarking responsiveness for Linux?”Submitted I will have to sadly declare 5.12-ck the last of the MuQSS and -ck patches as a story · 2 points
HN discussionSubmitted MuQSS – The Multiple Queue Skiplist Scheduler (BFS Evolution) as a story · 1 points
HN discussion