migration: Remove non-multifd compression

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>

2 files changed, 55 insertions, 11 deletions

diff --git a/docs/about/deprecated.rst b/docs/about/deprecated.rst
index 3d324930f3..64b8f838be 100644
--- a/docs/about/deprecated.rst
+++ b/docs/about/deprecated.rst
@@ -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.
diff --git a/docs/about/removed-features.rst b/docs/about/removed-features.rst
index 9e7d8ee4ff..fba0cfb0b0 100644
--- a/docs/about/removed-features.rst
+++ b/docs/about/removed-features.rst
@@ -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
 ------------------