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b=b+tzixxmV1ZRmL/hj6nA0kkhxHaUdNXKQqWLsC+tDqtp42wPV/HVAldl2UR2lg/rT xSJtZgyEUdh9WxYrFtcKmqnPiupLOQerU+GcoaZlxAwHQ7BHUkwHOT+4MLntXo2qFU 9de67fdf8StJsO22yf01YKRQiw7y3RYkO/wk+/pk= Date: Tue, 25 Nov 2025 10:30:12 -0800 From: Andrew Morton To: Pasha Tatashin Cc: pratyush@kernel.org, jasonmiu@google.com, graf@amazon.com, rppt@kernel.org, dmatlack@google.com, rientjes@google.com, corbet@lwn.net, rdunlap@infradead.org, ilpo.jarvinen@linux.intel.com, kanie@linux.alibaba.com, ojeda@kernel.org, aliceryhl@google.com, masahiroy@kernel.org, tj@kernel.org, yoann.congal@smile.fr, mmaurer@google.com, roman.gushchin@linux.dev, chenridong@huawei.com, axboe@kernel.dk, mark.rutland@arm.com, jannh@google.com, vincent.guittot@linaro.org, hannes@cmpxchg.org, dan.j.williams@intel.com, david@redhat.com, joel.granados@kernel.org, rostedt@goodmis.org, anna.schumaker@oracle.com, song@kernel.org, linux@weissschuh.net, linux-kernel@vger.kernel.org, linux-doc@vger.kernel.org, linux-mm@kvack.org, gregkh@linuxfoundation.org, tglx@linutronix.de, mingo@redhat.com, bp@alien8.de, dave.hansen@linux.intel.com, x86@kernel.org, hpa@zytor.com, rafael@kernel.org, dakr@kernel.org, bartosz.golaszewski@linaro.org, cw00.choi@samsung.com, myungjoo.ham@samsung.com, yesanishhere@gmail.com, Jonathan.Cameron@huawei.com, quic_zijuhu@quicinc.com, aleksander.lobakin@intel.com, ira.weiny@intel.com, andriy.shevchenko@linux.intel.com, leon@kernel.org, lukas@wunner.de, bhelgaas@google.com, wagi@kernel.org, djeffery@redhat.com, stuart.w.hayes@gmail.com, ptyadav@amazon.de, lennart@poettering.net, brauner@kernel.org, linux-api@vger.kernel.org, linux-fsdevel@vger.kernel.org, saeedm@nvidia.com, ajayachandra@nvidia.com, jgg@nvidia.com, parav@nvidia.com, leonro@nvidia.com, witu@nvidia.com, hughd@google.com, skhawaja@google.com, chrisl@kernel.org Subject: Re: [PATCH v8 00/18] Live Update Orchestrator Message-Id: <20251125103012.c9f0519e166b810e2e03e1b0@linux-foundation.org> In-Reply-To: <20251125165850.3389713-1-pasha.tatashin@soleen.com> References: <20251125165850.3389713-1-pasha.tatashin@soleen.com> X-Mailer: Sylpheed 3.8.0beta1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit X-Rspamd-Queue-Id: 31AD11C0015 X-Rspamd-Server: rspam06 X-Rspam-User: X-Stat-Signature: mcpxz8dgwtf66itepzdo177j1yy84qe8 X-HE-Tag: 1764095417-392439 X-HE-Meta: U2FsdGVkX1/JkVF3YsyrF7+TkE/x5m1qRCuST3sWbXRzUbG7z9yBRhS3IJF1CNbC+4ltpPTF+D6ifa/XV3MKXZgCNTLFbaE6GZREz3J+9w8nXJYDQQSrjCEfwmoqGks0HilTvxCduEcQjnOdhMwR5VIbVdiuEjcJTQH4bVkds/qheFRCZ5AkIkDfP77hNBVZR+iuUHdNAWDEazgr8ZVBoPt8VBL5X1CNlc49EKHYXjVUQiSKTZio55HSowWtqWf5r20Sg1F76p9OUNkLxip41vrhOYjStiEBIk+p1R4e2ZhXZuTO5Lu7PBFIoMdZIrY/dbJNISFMwsvVfn7rcVQ8anM+M5kiPw9XzSTPFjmdeRstpTSetk0UMtYH/YkEfo7xHamO1dRP0ibeJSMpGI1vsDY2q2h4VqltK89rlaorhU7S4CDGVx02RWdjiDPARs29Xrq23Vmdd02SH39wxOFVCdIrJTk/czqqxPTeQjUkTfsk0GNyekPLaqfMWlJQzufvgNWuWaVmSxaxY9gAP4dj/ju2A7h3EV0aSnBevWsDb3uyJgZjUn57iy9EFAN1t180KgYpP05lKE3F2s+btxJCwt0N45NlCYjdwdWlNEfMmh06Sg+rZKfdH2yPzrkN3RWCnwto0SUOpJWvPCDzeV46YGY0UteqPKwM0AfZpyyBG++BGMMpkYLbKWH/Y1Pj2CqBS/6gVVUqYr1XyB5dkXRYk27AKY9uyT1erPv1hIkIPwFsRX0dkQedLoPx+sQxtoSl/RqzECc3LbOlbZOOlaI0mCfoIb/1Oyzk4ZaG8scWY+smkUe2uh/omS23SrYw6PDG2uQfmbO3czu+NuBSxSqb+wQ1S3jVoorpa4lJgM+vP8KVKVZVOKGTw74CPGlu4puS2cTf9BVUUDsIBz9Ve70YKMq2EJcguXOrUVuq6ay0mS/sMjjdabaWRvPt7/cUPX6Vu3KFLal4cFoQ8r+fO2d aF1YJa+e p128TO0KHREQZNAWHmjrP+16OjhYZ7UBXQpS8JbkJsF+YJCR3rrkIrtsDO4vJvh8Ai7TXCUN9HB6km2/f9ML3ONj3Ja7xW+pUuU++OnftO1j3hm1H+upQMcN0y+cT2d3MVRxsdF7OcR3C0GcCWRdUko3CXBaN2YdsBJbi/0Jwi9ndUAbignIW/r0eGMKi07CyXGWJudbaBoRKUQPZ9h66kcIbjN7h+ouqd4IMt0JNNlmSXRsVjz7YRZv8AKRIY2rM22i3Nqj+X9C5DCR2ywnsMF9Mb6WDLJlqs5hYCXhZMSRRwwezxXRIhwIhuVKXYkxXOBfrtFcs/hgTR3mBFtv/qgo0OlkTht8Xb3cKHgVC1E9Y8VEp/uS66N9Yvg== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: On Tue, 25 Nov 2025 11:58:30 -0500 Pasha Tatashin 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 #