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| author | Dr. David Alan Gilbert <dgilbert@redhat.com> | 2017-10-20 10:05:50 +0100 |
|---|---|---|
| committer | Juan Quintela <quintela@redhat.com> | 2017-10-23 18:03:27 +0200 |
| commit | 93fbd0314ec060ffaf90169a06d5737fa97ffb25 (patch) | |
| tree | a7e5569ec2d4cee4ba3347db9fbf86d7e6e245b4 | |
| parent | 80f8dfde97e89739d7b9edcf0afceaed3f7f2aad (diff) | |
| download | qemu-93fbd0314ec060ffaf90169a06d5737fa97ffb25.zip qemu-93fbd0314ec060ffaf90169a06d5737fa97ffb25.tar.gz qemu-93fbd0314ec060ffaf90169a06d5737fa97ffb25.tar.bz2 | |
migration: Add 'pause-before-switchover' capability
When 'pause-before-switchover' is enabled, the outgoing migration
will pause before invalidating the block devices and serializing
the device state.
At this point the management layer gets the chance to clean up any
device jobs or other device users before the migration completes.
Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Peter Xu <peterx@redhat.com>
Reviewed-by: Juan Quintela <quintela@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>
| -rw-r--r-- | migration/migration.c | 10 | ||||
| -rw-r--r-- | migration/migration.h | 1 | ||||
| -rw-r--r-- | qapi/migration.json | 5 |
3 files changed, 15 insertions, 1 deletions
diff --git a/migration/migration.c b/migration/migration.c index 3feffb5..c041ec7 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -1511,6 +1511,16 @@ bool migrate_use_multifd(void) return s->enabled_capabilities[MIGRATION_CAPABILITY_X_MULTIFD]; } +bool migrate_pause_before_switchover(void) +{ + MigrationState *s; + + s = migrate_get_current(); + + return s->enabled_capabilities[ + MIGRATION_CAPABILITY_PAUSE_BEFORE_SWITCHOVER]; +} + int migrate_multifd_channels(void) { MigrationState *s; diff --git a/migration/migration.h b/migration/migration.h index b83ccea..9698663 100644 --- a/migration/migration.h +++ b/migration/migration.h @@ -177,6 +177,7 @@ bool migrate_zero_blocks(void); bool migrate_auto_converge(void); bool migrate_use_multifd(void); +bool migrate_pause_before_switchover(void); int migrate_multifd_channels(void); int migrate_multifd_page_count(void); diff --git a/qapi/migration.json b/qapi/migration.json index f8b365e..4960231 100644 --- a/qapi/migration.json +++ b/qapi/migration.json @@ -341,6 +341,9 @@ # @return-path: If enabled, migration will use the return path even # for precopy. (since 2.10) # +# @pause-before-switchover: Pause outgoing migration before serialising device +# state and before disabling block IO (since 2.11) +# # @x-multifd: Use more than one fd for migration (since 2.11) # # Since: 1.2 @@ -348,7 +351,7 @@ { 'enum': 'MigrationCapability', 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks', 'compress', 'events', 'postcopy-ram', 'x-colo', 'release-ram', - 'block', 'return-path', 'x-multifd' ] } + 'block', 'return-path', 'pause-before-switchover', 'x-multifd' ] } ## # @MigrationCapabilityStatus: |