[LU-20068] port mballoc patch "fix zombie groups"

• Type: Improvement
• Resolution: Unresolved
• Priority: Medium
• Severity: 3
• Assignee: WC Triage
• Reporter: Alex Zhuravlev

Description

port and add the following patch to our series

commit 1c320d8e92925bb7615f83a7b6e3f402a5c2ca63
Author: Baokun Li <[e-mail]>
Date: Mon Jul 14 21:03:20 2025 +0800

ext4: fix zombie groups in average fragment size lists