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migration: mode parameter

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Create a mode migration parameter that can be used to select alternate
migration algorithms.  The default mode is normal, representing the
current migration algorithm, and does not need to be explicitly set.

No functional change until a new mode is added, except that the mode is
shown by the 'info migrate' command.

Signed-off-by: Steve Sistare <steven.sistare@oracle.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
Message-ID: <1698263069-406971-2-git-send-email-steven.sistare@oracle.com>
This commit is contained in:
Steve Sistare 2023-10-25 12:44:24 -07:00 • committed by Juan Quintela
parent 3e5f3bcdc2
commit eea1e5c9d6
7 changed files with 74 additions and 3 deletions
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27
qapi/migration.json
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@ -631,6 +631,15 @@
'data': [ 'none', 'zlib',
{ 'name': 'zstd', 'if': 'CONFIG_ZSTD' } ] }
##
# @MigMode:
#
# @normal: the original form of migration. (since 8.2)
#
##
{ 'enum': 'MigMode',
'data': [ 'normal' ] }
##
# @BitmapMigrationBitmapAliasTransform:
#
@ -849,6 +858,9 @@
# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration.
# Defaults to 1. (Since 8.1)
#
# @mode: Migration mode. See description in @MigMode. Default is 'normal'.
# (Since 8.2)
#
# Features:
#
# @deprecated: Member @block-incremental is deprecated. Use
@ -881,7 +893,8 @@
'multifd-zlib-level', 'multifd-zstd-level',
'block-bitmap-mapping',
{ 'name': 'x-vcpu-dirty-limit-period', 'features': ['unstable'] },
'vcpu-dirty-limit'] }
'vcpu-dirty-limit',
'mode'] }
##
# @MigrateSetParameters:
@ -1033,6 +1046,9 @@
# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration.
# Defaults to 1. (Since 8.1)
#
# @mode: Migration mode. See description in @MigMode. Default is 'normal'.
# (Since 8.2)
#
# Features:
#
# @deprecated: Member @block-incremental is deprecated. Use
@ -1085,7 +1101,8 @@
'*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ],
'*x-vcpu-dirty-limit-period': { 'type': 'uint64',
'features': [ 'unstable' ] },
'*vcpu-dirty-limit': 'uint64'} }
'*vcpu-dirty-limit': 'uint64',
'*mode': 'MigMode'} }
##
# @migrate-set-parameters:
@ -1257,6 +1274,9 @@
# @vcpu-dirty-limit: Dirtyrate limit (MB/s) during live migration.
# Defaults to 1. (Since 8.1)
#
# @mode: Migration mode. See description in @MigMode. Default is 'normal'.
# (Since 8.2)
#
# Features:
#
# @deprecated: Member @block-incremental is deprecated. Use
@ -1306,7 +1326,8 @@
'*block-bitmap-mapping': [ 'BitmapMigrationNodeAlias' ],
'*x-vcpu-dirty-limit-period': { 'type': 'uint64',
'features': [ 'unstable' ] },
'*vcpu-dirty-limit': 'uint64'} }
'*vcpu-dirty-limit': 'uint64',
'*mode': 'MigMode'} }
##
# @query-migrate-parameters: