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authorPeter Maydell <peter.maydell@linaro.org>2022-03-02 20:55:48 +0000
committerPeter Maydell <peter.maydell@linaro.org>2022-03-02 20:55:48 +0000
commit36eae3a732a1f2aa81391e871ac0e9bb3233e7d7 (patch)
tree1c7f2a82dbe53e02d2e4c8a011e5d85f1acf6dd2 /docs
parent64ada298b98a51eb2512607f6e6180cb330c47b1 (diff)
parent18621987027b1800f315fb9e29967e7b5398ef6f (diff)
Merge remote-tracking branch 'remotes/dgilbert-gitlab/tags/pull-migration-20220302b' into staging
Migration/HMP/Virtio pull 2022-03-02 A bit of a mix this time: * Minor fixes from myself, Hanna, and Jack * VNC password rework by Stefan and Fabian * Postcopy changes from Peter X that are the start of a larger series to come * Removing the prehistoic load_state_old code from Peter M Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com> # gpg: Signature made Wed 02 Mar 2022 18:25:12 GMT # gpg: using RSA key 45F5C71B4A0CB7FB977A9FA90516331EBC5BFDE7 # gpg: Good signature from "Dr. David Alan Gilbert (RH2) <dgilbert@redhat.com>" [full] # Primary key fingerprint: 45F5 C71B 4A0C B7FB 977A 9FA9 0516 331E BC5B FDE7 * remotes/dgilbert-gitlab/tags/pull-migration-20220302b: migration: Remove load_state_old and minimum_version_id_old tests: Pass in MigrateStart** into test_migrate_start() migration: Add migration_incoming_transport_cleanup() migration: postcopy_pause_fault_thread() never fails migration: Enlarge postcopy recovery to capture !-EIO too migration: Move static var in ram_block_from_stream() into global migration: Add postcopy_thread_create() migration: Dump ramblock and offset too when non-same-page detected migration: Introduce postcopy channels on dest node migration: Tracepoint change in postcopy-run bottom half migration: Finer grained tracepoints for POSTCOPY_LISTEN migration: Dump sub-cmd name in loadvm_process_command tp migration/rdma: set the REUSEADDR option for destination qapi/monitor: allow VNC display id in set/expire_password qapi/monitor: refactor set/expire_password with enums monitor/hmp: add support for flag argument with value virtiofsd: Let meson check for statx.stx_mnt_id clock-vmstate: Add missing END_OF_LIST Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'docs')
-rw-r--r--docs/devel/migration.rst12
1 files changed, 3 insertions, 9 deletions
diff --git a/docs/devel/migration.rst b/docs/devel/migration.rst
index 2401253482..3e9656d8e0 100644
--- a/docs/devel/migration.rst
+++ b/docs/devel/migration.rst
@@ -389,19 +389,13 @@ Each version is associated with a series of fields saved. The ``save_state`` al
the state as the newer version. But ``load_state`` sometimes is able to
load state from an older version.
-You can see that there are several version fields:
+You can see that there are two version fields:
- ``version_id``: the maximum version_id supported by VMState for that device.
- ``minimum_version_id``: the minimum version_id that VMState is able to understand
for that device.
-- ``minimum_version_id_old``: For devices that were not able to port to vmstate, we can
- assign a function that knows how to read this old state. This field is
- ignored if there is no ``load_state_old`` handler.
-
-VMState is able to read versions from minimum_version_id to
-version_id. And the function ``load_state_old()`` (if present) is able to
-load state from minimum_version_id_old to minimum_version_id. This
-function is deprecated and will be removed when no more users are left.
+
+VMState is able to read versions from minimum_version_id to version_id.
There are *_V* forms of many ``VMSTATE_`` macros to load fields for version dependent fields,
e.g.