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In versions 2.6.0 to 2.6.22, the kernel used an [[O(1) scheduler]] developed by [[Ingo Molnar]] and many other kernel developers during the Linux 2.5 development. For many kernel in time frame, [[Con Kolivas]] developed patch sets which improved interactivity with this scheduler or even replaced it with his own schedulers.
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Con Kolivas' work, most significantly his implementation of [[fair-share scheduling|fair scheduling]] named [[Rotating Staircase Deadline]] (RSDL), inspired Ingo Molnár to develop the [[Completely Fair Scheduler]] (CFS) as a replacement for the earlier [[O(1) scheduler]], crediting Kolivas in his announcement.<ref>{{cite mailing list
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The [[Brain Fuck Scheduler]], also created by Con Kolivas, is an alternative to the CFS.
==== Linux 6.6 ====
In 2023, Peter Zijlstra proposed replacing CFS with an [[earliest eligible virtual deadline first scheduling]] (EEVDF) process scheduler.<ref>{{Cite web |title=EEVDF Scheduler May Be Ready For Landing With Linux 6.6 |url=https://www.phoronix.com/news/Linux-6.6-EEVDF-Likely |access-date=2023-08-31 |website=[[Phoronix]] |language=en}}</ref> The aim was to remove the need for CFS ''latency nice'' patches.<ref>{{Cite web |title=An EEVDF CPU scheduler for Linux [LWN.net] |url=https://lwn.net/Articles/925371/ |access-date=2023-08-31 |website=[[LWN.net]]}}</ref>
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