Massive performance improvement in Linux 6.12

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sherrellbc

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Jan 11, 2025
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Is there any plan to support linux 6.12 for an incremental release? Or perhaps the next major release. There have been some massive performance improvements merged into 6.12 and, especially for virtualization tooling, it would be a shame to miss out on these. I am new here, so I am not as familiar with the release cadence, but thought it prudent to ask the community.

tl;dr; Linux recently has seen performance improvements to context switching on the border of 88% (among quite a lot more). Hardware accelerated virtualization products like KVM are, of course, built on context switching between the host and guest VMs. I expect virtualization to benefit greatly from the new fixes in Linux 6.12.
 
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Although is not encourage, you can compile a custom kernel for yourself. Not an easy task, I might add.
Here some instructions:

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[TUTORIAL] Thread 'Proxmox VE 8.0 Mainline Kernel Builds'

I forked and modified the Proxmox kernel repo to build mainline releases with their modifications. The modifications I made feels like a fair amount of duct tape was used to make this work. But for now, it compiles mainline builds and I'll get around to cleaning it up + automating releases.

https://github.com/1vivy/pve-kernel is the repo.

You can grab a commit/tag for KERNEL_SHA1 and ZFS_SHA1 variables. The relevant upstream repos are in the README or .gitmodules
For KERNEL_SHA1, stick to tags with the naming scheme of cod/mainline/cod/tip/daily/2023-10-14, or...
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Let me know about your progress.

Best regards.
 
sherrellbc said:
Is there any plan to support linux 6.12 for an incremental release? Or perhaps the next major release. There have been some massive performance improvements merged into 6.12 and, especially for virtualization tooling, it would be a shame to miss out on these. I am new here, so I am not as familiar with the release cadence, but thought it prudent to ask the community.

tl;dr; Linux recently has seen performance improvements to context switching on the border of 88% (among quite a lot more). Hardware accelerated virtualization products like KVM are, of course, built on context switching between the host and guest VMs. I expect virtualization to benefit greatly from the new fixes in Linux 6.12.
Click to expand...
6.12 kernel will come with Debian Trixie (see : https://packages.debian.org/testing/kernel/). Proxmox may integrate it before Trixie release. We just have to wait. Or you can try kernel compilation ;)
 
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Building a custom kernel in general is no trouble. It's the alignment of kernel release with existing Proxmox patches on a newer kernel that might be problematic. But it looks possible, given the link that was posted above.
 
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