A Fix Is Pending For That Linux 5.15 Performance Regression
Written by Michael Larabel in Software on 23 September 2021. Page 4 of 4. 5 Comments

No surprise now, but the Ryzen 9 5950X also recovered with this patch. (The Linux testing here compared to 5.13 stable due to 5.14 failing to boot on this system due to a seg fault.)

Similar tests on other Intel and AMD systems also jived with these findings that this patch does indeed correct the Linux 5.15 performance regression. As of now the patch is on the mailing list but will hopefully see the mainline kernel in the coming days.

If you appreciate this kernel benchmarking and the time devoted to helping to test around this issue, consider joining Phoronix Premium especially with right now there being the Oktoberfest special.

Update: The regression fix has landed in Linux 5.15 Git.

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Michael Larabel is the principal author of Phoronix.com 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 OpenBenchmarking.org automated benchmarking software. He can be followed via Twitter or contacted via MichaelLarabel.com.

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