ReactOS "Open-Source Windows" Making Progress On SMP/Multi-Core Support

Written by Michael Larabel in Operating Systems on 13 March 2022 at 12:57 PM EDT. 40 Comments
ReactOS as the open-source project striving for binary compatibility with Windows applications/drivers is still working away in 2022 on symmetric multi-processing (SMP) support.

Proper SMP/multi-core support is obviously critical for today's hardware or even anything in the past roughly two decades... It's also been a pain point for ReactOS, but fortunately the situation is improving.

Experimental code allows getting ReactOS booting to the desktop in SMP mode.

With experimental code ReactOS has for a first time been able to run in SMP mode and reach their desktop - albeit in safe mode.

While an achievement on their path towards proper SMP support, this latest ReactOS code isn't yet merged or ready to be - more work is needed ahead of getting that code mainlined. In any event, a major milestone for ReactOS and this "open-source Windows" OS effort moves forward.
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Michael Larabel is the principal author of and founded the site in 2004 with a focus on enriching the Linux hardware experience. Michael has written more than 20,000 articles covering the state of Linux hardware support, Linux performance, graphics drivers, and other topics. Michael is also the lead developer of the Phoronix Test Suite, Phoromatic, and automated benchmarking software. He can be followed via Twitter, LinkedIn, or contacted via

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