[PATCH v8 15/18] docs: add documentation for memfd preservation via LUO
From: Pasha Tatashin <pasha.tatashin@soleen.com>
Date: 2025-11-25 16:59:37
Also in:
linux-doc, linux-fsdevel, linux-mm, lkml
Subsystem:
documentation, live update, memory management - misc, the rest · Maintainers:
Jonathan Corbet, Pasha Tatashin, Mike Rapoport, Pratyush Yadav, Andrew Morton, David Hildenbrand, Linus Torvalds
From: Pratyush Yadav <redacted> Add the documentation under the "Preserving file descriptors" section of LUO's documentation. Signed-off-by: Pratyush Yadav <redacted> Co-developed-by: Pasha Tatashin <pasha.tatashin@soleen.com> Signed-off-by: Pasha Tatashin <pasha.tatashin@soleen.com> Reviewed-by: Mike Rapoport (Microsoft) <rppt@kernel.org> --- Documentation/core-api/liveupdate.rst | 7 +++++++ Documentation/mm/index.rst | 1 + Documentation/mm/memfd_preservation.rst | 23 +++++++++++++++++++++++ MAINTAINERS | 1 + 4 files changed, 32 insertions(+) create mode 100644 Documentation/mm/memfd_preservation.rst
diff --git a/Documentation/core-api/liveupdate.rst b/Documentation/core-api/liveupdate.rst
index cca1993008d8..7960eb15a81f 100644
--- a/Documentation/core-api/liveupdate.rst
+++ b/Documentation/core-api/liveupdate.rst@@ -23,6 +23,13 @@ Live Update Orchestrator ABI .. kernel-doc:: include/linux/kho/abi/luo.h :doc: Live Update Orchestrator ABI +The following types of file descriptors can be preserved + +.. toctree:: + :maxdepth: 1 + + ../mm/memfd_preservation + Public API ========== .. kernel-doc:: include/linux/liveupdate.h
diff --git a/Documentation/mm/index.rst b/Documentation/mm/index.rst
index ba6a8872849b..7aa2a8886908 100644
--- a/Documentation/mm/index.rst
+++ b/Documentation/mm/index.rst@@ -48,6 +48,7 @@ documentation, or deleted if it has served its purpose. hugetlbfs_reserv ksm memory-model + memfd_preservation mmu_notifier multigen_lru numa
diff --git a/Documentation/mm/memfd_preservation.rst b/Documentation/mm/memfd_preservation.rst
new file mode 100644
index 000000000000..66e0fb6d5ef0
--- /dev/null
+++ b/Documentation/mm/memfd_preservation.rst@@ -0,0 +1,23 @@ +.. SPDX-License-Identifier: GPL-2.0-or-later + +========================== +Memfd Preservation via LUO +========================== + +.. kernel-doc:: mm/memfd_luo.c + :doc: Memfd Preservation via LUO + +Memfd Preservation ABI +====================== + +.. kernel-doc:: include/linux/kho/abi/memfd.h + :doc: DOC: memfd Live Update ABI + +.. kernel-doc:: include/linux/kho/abi/memfd.h + :internal: + +See Also +======== + +- :doc:`/core-api/liveupdate` +- :doc:`/core-api/kho/concepts`
diff --git a/MAINTAINERS b/MAINTAINERS
index 425c46bba764..cabbf30d50e1 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS@@ -14473,6 +14473,7 @@ R: Pratyush Yadav <pratyush@kernel.org> L: linux-kernel@vger.kernel.org S: Maintained F: Documentation/core-api/liveupdate.rst +F: Documentation/mm/memfd_preservation.rst F: Documentation/userspace-api/liveupdate.rst F: include/linux/liveupdate.h F: include/linux/liveupdate/
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2.52.0.460.gd25c4c69ec-goog