numa: forbid '-numa node, mem' for 5.1 and newer machine types

Deprecation period is run out and it's a time to flip the switch
introduced by cd5ff8333a.  Disable legacy option for new machine
types (since 5.1) and amend documentation.

'-numa node,memdev' shall be used instead of disabled option
with new machine types.

Signed-off-by: Igor Mammedov <imammedo@redhat.com>
Reviewed-by: Michal Privoznik <mprivozn@redhat.com>
Reviewed-by: Michael S. Tsirkin <mst@redhat.com>
Reviewed-by: Greg Kurz <groug@kaod.org>
Message-Id: <20200609135635.761587-1-imammedo@redhat.com>
Signed-off-by: Paolo Bonzini <pbonzini@redhat.com>

1 files changed, 20 insertions, 17 deletions

diff --git a/docs/system/deprecated.rst b/docs/system/deprecated.rst
index 728233a8ff..843ae71fc6 100644
--- a/docs/system/deprecated.rst
+++ b/docs/system/deprecated.rst
@@ -95,23 +95,6 @@ error in the future.
 The ``-realtime mlock=on|off`` argument has been replaced by the
 ``-overcommit mem-lock=on|off`` argument.
 
-``-numa node,mem=``\ *size* (since 4.1)
-'''''''''''''''''''''''''''''''''''''''
-
-The parameter ``mem`` of ``-numa node`` is used to assign a part of
-guest RAM to a NUMA node. But when using it, it's impossible to manage specified
-RAM chunk on the host side (like bind it to a host node, setting bind policy, ...),
-so guest end-ups with the fake NUMA configuration with suboptiomal performance.
-However since 2014 there is an alternative way to assign RAM to a NUMA node
-using parameter ``memdev``, which does the same as ``mem`` and adds
-means to actualy manage node RAM on the host side. Use parameter ``memdev``
-with *memory-backend-ram* backend as an replacement for parameter ``mem``
-to achieve the same fake NUMA effect or a properly configured
-*memory-backend-file* backend to actually benefit from NUMA configuration.
-In future new machine versions will not accept the option but it will still
-work with old machine types. User can check QAPI schema to see if the legacy
-option is supported by looking at MachineInfo::numa-mem-supported property.
-
 ``-numa`` node (without memory specified) (since 4.1)
 '''''''''''''''''''''''''''''''''''''''''''''''''''''
 
@@ -553,3 +536,23 @@ long starting at 1MiB, the old command::
 can be rewritten as::
 
   qemu-nbd -t --image-opts driver=raw,offset=1M,size=100M,file.driver=qcow2,file.file.driver=file,file.file.filename=file.qcow2
+
+Command line options
+--------------------
+
+``-numa node,mem=``\ *size* (removed in 5.1)
+''''''''''''''''''''''''''''''''''''''''''''
+
+The parameter ``mem`` of ``-numa node`` was used to assign a part of
+guest RAM to a NUMA node. But when using it, it's impossible to manage a specified
+RAM chunk on the host side (like bind it to a host node, setting bind policy, ...),
+so the guest ends up with the fake NUMA configuration with suboptiomal performance.
+However since 2014 there is an alternative way to assign RAM to a NUMA node
+using parameter ``memdev``, which does the same as ``mem`` and adds
+means to actually manage node RAM on the host side. Use parameter ``memdev``
+with *memory-backend-ram* backend as replacement for parameter ``mem``
+to achieve the same fake NUMA effect or a properly configured
+*memory-backend-file* backend to actually benefit from NUMA configuration.
+New machine versions (since 5.1) will not accept the option but it will still
+work with old machine types. User can check the QAPI schema to see if the legacy
+option is supported by looking at MachineInfo::numa-mem-supported property.