kernel upgrade: Update OpenHCL to use v6.18.37.5 (#4315) - #4318
Merged
Steven Malis (smalis-msft) merged 1 commit intoAug 26, 2026
Merged
Conversation
Upgrade kernel used in OpenHCL to 6.18.37.5 release tag. Regenerate all variant hashes (hcl-main, std/cvm, x64/arm64) in openhcl_kernel.nix. This includes fix for page table memory regression in VTL2. Kernel PR: microsoft/OHCL-Linux-Kernel#159 Signed-off-by: Naman Jain <namjain@linux.microsoft.com>
Steven Malis (smalis-msft)
enabled auto-merge (squash)
August 26, 2026 14:48
github-actions
Bot
added
the
release_1.8.2607
Copilot started reviewing on behalf of
Steven Malis (smalis-msft)
August 26, 2026 14:48
View session
Mike Ebersol (mebersol)
approved these changes
Aug 26, 2026
Contributor
There was a problem hiding this comment.
Pull request overview
Updates the OpenHCL kernel release referenced by OpenVMM’s Nix/Flowey tooling to the 6.18.37.5 rolling-lts tag, including the corresponding fixed-output hashes so Nix fetches remain reproducible.
Changes:
- Bump the OpenHCL stable kernel version to
6.18.37.5. - Regenerate/update Nix
fetchziphashes forhcl-mainstd (x64/arm64) and cvm (x64) kernel artifacts. - Keep Flowey’s kernel version constant in sync with the Nix kernel version.
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.
| File | Description |
|---|---|
| nix/openhcl_kernel.nix | Updates the stable kernel version and all relevant Nix fixed-output hashes for the new release artifacts. |
| flowey/flowey_lib_hvlite/src/_jobs/cfg_versions.rs | Bumps OPENHCL_KERNEL_STABLE_VERSION so Flowey resolves the same stable kernel version used by Nix. |
💡 Add a code-review agent skill or configure MCP servers for context-aware, tailored reviews. Learn more in the docs.
Steven Malis (smalis-msft)
merged commit Aug 26, 2026
a939913
into
microsoft:release/1.8.2607
93 of 97 checks passed
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
Upgrade kernel used in OpenHCL to 6.18.37.5 release tag. Regenerate all variant hashes (hcl-main, std/cvm, x64/arm64) in openhcl_kernel.nix. This includes fix for page table memory regression in VTL2.
Kernel PR: microsoft/OHCL-Linux-Kernel#159