diff options
Diffstat (limited to 'migration/migration.c')
| -rw-r--r-- | migration/migration.c | 34 |
1 files changed, 27 insertions, 7 deletions
diff --git a/migration/migration.c b/migration/migration.c index a5384865ff..1e99ec9b7e 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -202,6 +202,16 @@ static void migrate_generate_event(int new_state) } } +static bool migrate_late_block_activate(void) +{ + MigrationState *s; + + s = migrate_get_current(); + + return s->enabled_capabilities[ + MIGRATION_CAPABILITY_LATE_BLOCK_ACTIVATE]; +} + /* * Called on -incoming with a defer: uri. * The migration can be started later after any parameters have been @@ -311,13 +321,23 @@ static void process_incoming_migration_bh(void *opaque) Error *local_err = NULL; MigrationIncomingState *mis = opaque; - /* Make sure all file formats flush their mutable metadata. - * If we get an error here, just don't restart the VM yet. */ - bdrv_invalidate_cache_all(&local_err); - if (local_err) { - error_report_err(local_err); - local_err = NULL; - autostart = false; + /* If capability late_block_activate is set: + * Only fire up the block code now if we're going to restart the + * VM, else 'cont' will do it. + * This causes file locking to happen; so we don't want it to happen + * unless we really are starting the VM. + */ + if (!migrate_late_block_activate() || + (autostart && (!global_state_received() || + global_state_get_runstate() == RUN_STATE_RUNNING))) { + /* Make sure all file formats flush their mutable metadata. + * If we get an error here, just don't restart the VM yet. */ + bdrv_invalidate_cache_all(&local_err); + if (local_err) { + error_report_err(local_err); + local_err = NULL; + autostart = false; + } } /* |