Re: [PATCH v8 00/18] Live Update Orchestrator

[Andrew Morton]

On Tue, 25 Nov 2025 11:58:30 -0500 Pasha Tatashin <pasha.tatashin@xxxxxxxxxx> wrote:

> Andrew: This series has been fully reviewed, and contains minimal
> changes compared to what is currently being tested in linux-next
> diff between v7 and v8 can be viewe, here: [8]
> 
> Four patches have been dropped compared to v7: and are going to be sent
> separately.
> 
> This series introduces the Live Update Orchestrator, a kernel subsystem
> designed to facilitate live kernel updates using a kexec-based reboot.
> This capability is critical for cloud environments, allowing hypervisors
> to be updated with minimal downtime for running virtual machines. LUO
> achieves this by preserving the state of selected resources, such as
> memory, devices and their dependencies, across the kernel transition.

Thanks, I updated mm.git's mm-nonmm-unstable branch to this version.

I expect I'll move all the below material into mm-nonmm-stable in a
couple of days.

kho-make-debugfs-interface-optional.patch
kho-drop-notifiers.patch
kho-add-interfaces-to-unpreserve-folios-page-ranges-and-vmalloc.patch
memblock-unpreserve-memory-in-case-of-error.patch
memblock-unpreserve-memory-in-case-of-error-fix.patch
test_kho-unpreserve-memory-in-case-of-error.patch
kho-dont-unpreserve-memory-during-abort.patch
liveupdate-kho-move-to-kernel-liveupdate.patch
liveupdate-kho-move-to-kernel-liveupdate-fix.patch
maintainers-update-kho-maintainers.patch
liveupdate-kho-use-%pe-format-specifier-for-error-pointer-printing.patch
#
kho-fix-misleading-log-message-in-kho_populate.patch
kho-convert-__kho_abort-to-return-void.patch
kho-introduce-high-level-memory-allocation-api.patch
kho-introduce-high-level-memory-allocation-api-fix.patch
kho-preserve-fdt-folio-only-once-during-initialization.patch
kho-verify-deserialization-status-and-fix-fdt-alignment-access.patch
kho-always-expose-output-fdt-in-debugfs.patch
kho-simplify-serialization-and-remove-__kho_abort.patch
kho-remove-global-preserved_mem_map-and-store-state-in-fdt.patch
kho-remove-abort-functionality-and-support-state-refresh.patch
kho-update-fdt-dynamically-for-subtree-addition-removal.patch
kho-allow-kexec-load-before-kho-finalization.patch
kho-allow-memory-preservation-state-updates-after-finalization.patch
kho-add-kconfig-option-to-enable-kho-by-default.patch
#
#
liveupdate-luo_core-live-update-orchestrato.patch
liveupdate-luo_core-integrate-with-kho.patch
kexec-call-liveupdate_reboot-before-kexec.patch
liveupdate-luo_session-add-sessions-support.patch
liveupdate-luo_core-add-user-interface.patch
liveupdate-luo_file-implement-file-systems-callbacks.patch
liveupdate-luo_session-add-ioctls-for-file-preservation.patch
docs-add-luo-documentation.patch
maintainers-add-liveupdate-entry.patch
mm-shmem-use-shmem_f_-flags-instead-of-vm_-flags.patch
mm-shmem-allow-freezing-inode-mapping.patch
mm-shmem-export-some-functions-to-internalh.patch
liveupdate-luo_file-add-private-argument-to-store-runtime-state.patch
mm-memfd_luo-allow-preserving-memfd.patch
docs-add-documentation-for-memfd-preservation-via-luo.patch
selftests-liveupdate-add-userspace-api-selftests.patch
selftests-liveupdate-add-simple-kexec-based-selftest-for-luo.patch
selftests-liveupdate-add-kexec-test-for-multiple-and-empty-sessions.patch
#
#
kho-free-chunks-using-free_page-instead-of-kfree.patch
#
test_kho-always-print-restore-status.patch
#
kho-kho_restore_vmalloc-fix-initialization-of-pages-array.patch
kho-fix-restoring-of-contiguous-ranges-of-order-0-pages.patch
#