** Description changed: SRU Justification [ Impact ] * Microsoft request to fix long boot times on arm64 VMs with 96 cores. [ Fix ] * Clean cherry-pick of the following patches from upstream: * 5c63db59c5f8: "arm64: mm: Don't remap pgtables per-cont(pte|pmd) block" * 1fcb7cea8a5f: "arm64: mm: Batch dsb and isb when populating pgtables" * 0e9df1c905d8: "arm64: mm: Don't remap pgtables for allocate vs populat" [ Test Plan ] * Compile tested * Microsoft to test further [ Where problems could occur ] - * + * Changes made to memory-management, which could have impacts across the memory subsystems. + * Backport involved stripping out portions of 5-level paging, which was missing prerequisite + commits. This has been validated, but if logic was not well-separated in the upstream commits, + the changes for present paging might have some reliance on the 5-level paging changes. [ Other info ] * SF#00412644
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2114218 Title: [Arm64] High reboot time for 96 core Linux VMs To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/2114218/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
