Linux 6.18 Merges Fix For "Catastrophic Performance Issue" On 64-bit ARM (via Phoronix)

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znmeb: Posts: 22; Joined: Mon Jun 06, 2022 6:52 pm

Linux 6.18 Merges Fix For "Catastrophic Performance Issue" On 64-bit ARM (via Phoronix)

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Wed Nov 12, 2025 2:12 am

In case you missed it, there's a performance issue on Arm 64-bit Linux fixed in 6.18. Here's the link:

https://www.phoronix.com/news/Linux-6.1 ... mics-Issue

How many people can stand on the shoulders of a giant before the giant collapses?

ejolson: Posts: 13865; Joined: Tue Mar 18, 2014 11:47 am

Re: Linux 6.18 Merges Fix For "Catastrophic Performance Issue" On 64-bit ARM (via Phoronix)

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Wed Nov 12, 2025 2:29 am

znmeb wrote: ↑
Wed Nov 12, 2025 2:12 am
In case you missed it, there's a performance issue on Arm 64-bit Linux fixed in 6.18. Here's the link:

https://www.phoronix.com/news/Linux-6.1 ... mics-Issue

I view that story as a good example showing why it's important for independent developers to have individual access to well-performing hardware.

I wonder what latencies per-CPU atomics have in Linux on IBM Power 11. If no hardware is available suitable for individual developers, there are many things that will never be fixed or optimised.