4.22-DNM DOWNSTREAM: <carry>: OCPBUGS-103516: Replace bbolt with patched fork …

[sdodson]

…to remove MADV_RANDOM

Since Linux 6.4, MADV_RANDOM causes the kernel to aggressively evict mmap'd pages, resulting in major page faults on bbolt's database file and order-of-magnitude compaction duration increases. The RHEL 10 kernel will not revert this behavior change, so the fix must be in bbolt.

This adds a go.mod replace directive pointing to a patched bbolt fork with the MADV_RANDOM madvise hint removed. The replace should be dropped once the fix is merged upstream (etcd-io/bbolt#939).

Ref: etcd-io/bbolt#939
Ref: https://redhat.atlassian.net/browse/OCPBUGS-103516

Assisted-by: Claude Code (Opus 4.6)

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

[openshift-ci-robot]

@sdodson: This pull request references Jira Issue OCPBUGS-103516, which is invalid:

• expected the bug to target either version "4.22." or "openshift-4.22.", but it targets "5.0.0" instead
• release note text must be set and not match the template OR release note type must be set to "Release Note Not Required". For more information you can reference the OpenShift Bug Process.
• expected Jira Issue OCPBUGS-103516 to depend on a bug targeting a version in 5.0.0 and in one of the following states: MODIFIED, ON_QA, VERIFIED, but no dependents were found

Comment /jira refresh to re-evaluate validity if changes to the Jira bug are made, or edit the title of this pull request to link to a different bug.

The bug has been updated to refer to the pull request using the external bug tracker.

Details

In response to this:

…to remove MADV_RANDOM

Since Linux 6.4, MADV_RANDOM causes the kernel to aggressively evict mmap'd pages, resulting in major page faults on bbolt's database file and order-of-magnitude compaction duration increases. The RHEL 10 kernel will not revert this behavior change, so the fix must be in bbolt.

This adds a go.mod replace directive pointing to a patched bbolt fork with the MADV_RANDOM madvise hint removed. The replace should be dropped once the fix is merged upstream (etcd-io/bbolt#939).

Ref: etcd-io/bbolt#939
Ref: https://redhat.atlassian.net/browse/OCPBUGS-103516

Assisted-by: Claude Code (Opus 4.6)

Please read https://github.com/etcd-io/etcd/blob/main/CONTRIBUTING.md#contribution-flow.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the openshift-eng/jira-lifecycle-plugin repository.

[coderabbitai]

Important

Review skipped

Auto reviews are disabled on base/target branches other than the default branch.

Please check the settings in the CodeRabbit UI or the .coderabbit.yaml file in this repository. To trigger a single review, invoke the @coderabbitai review command.

⚙️ Run configuration

Configuration used: Repository: openshift/coderabbit/.coderabbit.yaml

Review profile: CHILL

Plan: Enterprise

Run ID: 91a3d768-96ae-4c02-88b7-8aa889d7dcdb

You can disable this status message by setting the reviews.review_status to false in the CodeRabbit configuration file.

Use the checkbox below for a quick retry:

• 🔍 Trigger review

---

_{Comment @coderabbitai help to get the list of available commands.}

[openshift-ci]

Skipping CI for Draft Pull Request.
If you want CI signal for your change, please convert it to an actual PR.
You can still manually trigger a test run with /test all

[openshift-ci]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: sdodson
Once this PR has been reviewed and has the lgtm label, please assign hasbro17 for approval. For more information see the Code Review Process.

The full list of commands accepted by this bot can be found here.

Details

Needs approval from an approver in each of these files:

• OWNERS

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[sdodson]

/payload-job periodic-ci-openshift-eng-ocp-perfscale-main-aws-4.22-nightly-x86-control-plane-fips-24nodes

/test perfscale-control-plane-6nodes

[openshift-ci]

@sdodson: trigger 1 job(s) for the /payload-(with-prs|job|aggregate|job-with-prs|aggregate-with-prs) command

• periodic-ci-openshift-eng-ocp-perfscale-main-aws-4.22-nightly-x86-control-plane-fips-24nodes

See details on https://pr-payload-tests.ci.openshift.org/runs/ci/1aa9cda0-90cc-11f1-8c35-9451b77da49f-0

[sdodson]

/test perfscale-payload-control-plane-6nodes

[openshift-ci]

@sdodson: all tests passed!

Full PR test history. Your PR dashboard.

Details

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository. I understand the commands that are listed here.