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migration: Remove non-multifd compression

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The 'compress' migration capability enables the old compression code
which has shown issues over the years and is thought to be less stable
and tested than the more recent multifd-based compression. The old
compression code has been deprecated in 8.2 and now is time to remove
it.

Deprecation commit 864128df46 ("migration: Deprecate old compression
method").

Acked-by: Markus Armbruster <armbru@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Signed-off-by: Fabiano Rosas <farosas@suse.de>
This commit is contained in:
Fabiano Rosas 2024-04-30 11:27:36 -03:00
parent eef0bae3a7
commit 0222111a22
16 changed files with 64 additions and 1368 deletions
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11
docs/about/deprecated.rst
View file

@ -473,14 +473,3 @@ both, older and future versions of QEMU.
The ``blacklist`` config file option has been renamed to ``block-rpcs``
(to be in sync with the renaming of the corresponding command line
option).
Migration
---------
old compression method (since 8.2)
''''''''''''''''''''''''''''''''''
Compression method fails too much. Too many races. We are going to
remove it if nobody fixes it. For starters, migration-test
compression tests are disabled because they fail randomly. If you need
compression, use multifd compression methods.

55
docs/about/removed-features.rst
View file

@ -505,6 +505,11 @@ configurations (e.g. -smp 8,sockets=0) is removed since 9.0, users have
to ensure that all the topology members described with -smp are greater
than zero.
``-global migration.decompress-error-check`` (removed in 9.1)
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Removed along with the ``compression`` migration capability.
User-mode emulator command line arguments
-----------------------------------------
@ -641,6 +646,31 @@ Block migration has been removed. For a replacement, see "QMP
invocation for live storage migration with ``blockdev-mirror`` + NBD"
in docs/interop/live-block-operations.rst.
``migrate-set-parameter`` ``compress-level`` option (removed in 9.1)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Use ``multifd-zlib-level`` or ``multifd-zstd-level`` instead.
``migrate-set-parameter`` ``compress-threads`` option (removed in 9.1)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Use ``multifd-channels`` instead.
``migrate-set-parameter`` ``compress-wait-thread`` option (removed in 9.1)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Removed with no replacement.
``migrate-set-parameter`` ``decompress-threads`` option (removed in 9.1)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Use ``multifd-channels`` instead.
``migrate-set-capability`` ``compress`` option (removed in 9.1)
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Use ``multifd-compression`` instead.
Human Monitor Protocol (HMP) commands
-------------------------------------
@ -722,6 +752,31 @@ Block migration has been removed. For a replacement, see "QMP
invocation for live storage migration with ``blockdev-mirror`` + NBD"
in docs/interop/live-block-operations.rst.
``migrate_set_parameter`` ``compress-level`` option (removed in 9.1)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Use ``multifd-zlib-level`` or ``multifd-zstd-level`` instead.
``migrate_set_parameter`` ``compress-threads`` option (removed in 9.1)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Use ``multifd-channels`` instead.
``migrate_set_parameter`` ``compress-wait-thread`` option (removed in 9.1)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Removed with no replacement.
``migrate_set_parameter`` ``decompress-threads`` option (removed in 9.1)
''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Use ``multifd-channels`` instead.
``migrate_set_capability`` ``compress`` option (removed in 9.1)
'''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''''
Use ``multifd-compression`` instead.
Host Architectures
------------------