diff options
| -rw-r--r-- | include/migration/migration.h | 1 | ||||
| -rw-r--r-- | migration/migration.c | 20 | ||||
| -rw-r--r-- | qapi-schema.json | 5 |
3 files changed, 23 insertions, 3 deletions
diff --git a/include/migration/migration.h b/include/migration/migration.h index a308eccf18..b2711ef305 100644 --- a/include/migration/migration.h +++ b/include/migration/migration.h @@ -177,6 +177,7 @@ bool migrate_use_compression(void); int migrate_compress_level(void); int migrate_compress_threads(void); int migrate_decompress_threads(void); +bool migrate_use_events(void); void ram_control_before_iterate(QEMUFile *f, uint64_t flags); void ram_control_after_iterate(QEMUFile *f, uint64_t flags); diff --git a/migration/migration.c b/migration/migration.c index d8415c4985..cd32eacc69 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -205,6 +205,14 @@ void register_global_state(void) vmstate_register(NULL, 0, &vmstate_globalstate, &global_state); } +static void migrate_generate_event(int new_state) +{ + if (migrate_use_events()) { + qapi_event_send_migration(new_state, &error_abort); + trace_migrate_set_state(new_state); + } +} + /* * Called on -incoming with a defer: uri. * The migration can be started later after any parameters have been @@ -511,8 +519,7 @@ void qmp_migrate_set_parameters(bool has_compress_level, static void migrate_set_state(MigrationState *s, int old_state, int new_state) { if (atomic_cmpxchg(&s->state, old_state, new_state) == old_state) { - qapi_event_send_migration(new_state, &error_abort); - trace_migrate_set_state(new_state); + migrate_generate_event(new_state); } } @@ -862,6 +869,15 @@ int migrate_decompress_threads(void) return s->parameters[MIGRATION_PARAMETER_DECOMPRESS_THREADS]; } +bool migrate_use_events(void) +{ + MigrationState *s; + + s = migrate_get_current(); + + return s->enabled_capabilities[MIGRATION_CAPABILITY_EVENTS]; +} + int migrate_use_xbzrle(void) { MigrationState *s; diff --git a/qapi-schema.json b/qapi-schema.json index 106008cdeb..1285b8c74a 100644 --- a/qapi-schema.json +++ b/qapi-schema.json @@ -523,6 +523,9 @@ # minimize migration traffic. The feature is disabled by default. # (since 2.4 ) # +# @events: generate events for each migration state change +# (since 2.4 ) +# # @auto-converge: If enabled, QEMU will automatically throttle down the guest # to speed up convergence of RAM migration. (since 1.6) # @@ -530,7 +533,7 @@ ## { 'enum': 'MigrationCapability', 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks', - 'compress'] } + 'compress', 'events'] } ## # @MigrationCapabilityStatus |