[LU-7968] build on master taking too long, causing huge backlogs

• Type: Improvement
• Resolution: Fixed
• Priority: Blocker
• Fix Version/s: Lustre 2.9.0
• Assignee: Dmitry Eremin (Inactive)
• Reporter: Bob Glossman (Inactive)

Description

It sure looks like as of recently all builds are taking > 90 minutes. I think this is due to all builds repeating server kernel builds even if they don't need to.

When no kernel builds get reused, no review build is fast. Backlogs grow quickly and empty out slowly.

wondering if some recent change in master has stopped reuse of server kernel builds causing all builds to rebuild kernels and take too long. need TEI to look at recent builds. I'm suspicious of recent landing for LU-7699. worried that changes in version and rpm names prevent build from recognizing perfectly good reusable kernel builds.

I know for sure backlogs have been very large lately and it's still happening. My idea about the underlying cause is just a theory. Need somebody in TEI who is in a position to know or find out to investigate.