diff options
| -rw-r--r-- | include/migration/colo.h | 9 | ||||
| -rw-r--r-- | migration/colo.c | 39 | ||||
| -rw-r--r-- | migration/migration.c | 28 | ||||
| -rw-r--r-- | stubs/colo.c | 6 |
4 files changed, 50 insertions, 32 deletions
diff --git a/include/migration/colo.h b/include/migration/colo.h index 7ef315473e..eaac07f26d 100644 --- a/include/migration/colo.h +++ b/include/migration/colo.h @@ -28,7 +28,6 @@ bool migration_in_colo_state(void); int migration_incoming_enable_colo(void); void migration_incoming_disable_colo(void); bool migration_incoming_colo_enabled(void); -void *colo_process_incoming_thread(void *opaque); bool migration_incoming_in_colo_state(void); COLOMode get_colo_mode(void); @@ -44,5 +43,13 @@ void colo_do_failover(void); */ void colo_checkpoint_delay_set(void); +/* + * Starts COLO incoming process. Called from process_incoming_migration_co() + * after loading the state. + * + * Called with BQL locked, may temporary release BQL. + */ +int coroutine_fn colo_incoming_co(void); + void colo_shutdown(void); #endif diff --git a/migration/colo.c b/migration/colo.c index a688ac553a..72f4f7b37e 100644 --- a/migration/colo.c +++ b/migration/colo.c @@ -817,7 +817,7 @@ void colo_shutdown(void) } } -void *colo_process_incoming_thread(void *opaque) +static void *colo_process_incoming_thread(void *opaque) { MigrationIncomingState *mis = opaque; QEMUFile *fb = NULL; @@ -918,3 +918,40 @@ out: rcu_unregister_thread(); return NULL; } + +int coroutine_fn colo_incoming_co(void) +{ + MigrationIncomingState *mis = migration_incoming_get_current(); + Error *local_err = NULL; + QemuThread th; + + assert(qemu_mutex_iothread_locked()); + + if (!migration_incoming_colo_enabled()) { + return 0; + } + + /* Make sure all file formats throw away their mutable metadata */ + bdrv_activate_all(&local_err); + if (local_err) { + error_report_err(local_err); + return -EINVAL; + } + + qemu_thread_create(&th, "COLO incoming", colo_process_incoming_thread, + mis, QEMU_THREAD_JOINABLE); + + mis->colo_incoming_co = qemu_coroutine_self(); + qemu_coroutine_yield(); + mis->colo_incoming_co = NULL; + + qemu_mutex_unlock_iothread(); + /* Wait checkpoint incoming thread exit before free resource */ + qemu_thread_join(&th); + qemu_mutex_lock_iothread(); + + /* We hold the global iothread lock, so it is safe here */ + colo_release_ram_cache(); + + return 0; +} diff --git a/migration/migration.c b/migration/migration.c index a6f2f6cacd..039bba4804 100644 --- a/migration/migration.c +++ b/migration/migration.c @@ -511,7 +511,6 @@ process_incoming_migration_co(void *opaque) MigrationIncomingState *mis = migration_incoming_get_current(); PostcopyState ps; int ret; - Error *local_err = NULL; assert(mis->from_src_file); @@ -555,37 +554,14 @@ process_incoming_migration_co(void *opaque) goto fail; } - /* we get COLO info, and know if we are in COLO mode */ - if (migration_incoming_colo_enabled()) { - QemuThread colo_incoming_thread; - - /* Make sure all file formats throw away their mutable metadata */ - bdrv_activate_all(&local_err); - if (local_err) { - error_report_err(local_err); - goto fail; - } - - qemu_thread_create(&colo_incoming_thread, "COLO incoming", - colo_process_incoming_thread, mis, QEMU_THREAD_JOINABLE); - - mis->colo_incoming_co = qemu_coroutine_self(); - qemu_coroutine_yield(); - mis->colo_incoming_co = NULL; - - qemu_mutex_unlock_iothread(); - /* Wait checkpoint incoming thread exit before free resource */ - qemu_thread_join(&colo_incoming_thread); - qemu_mutex_lock_iothread(); - /* We hold the global iothread lock, so it is safe here */ - colo_release_ram_cache(); + if (colo_incoming_co() < 0) { + goto fail; } mis->bh = qemu_bh_new(process_incoming_migration_bh, mis); qemu_bh_schedule(mis->bh); return; fail: - local_err = NULL; migrate_set_state(&mis->state, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_FAILED); qemu_fclose(mis->from_src_file); diff --git a/stubs/colo.c b/stubs/colo.c index cf9816d368..f33379d0fd 100644 --- a/stubs/colo.c +++ b/stubs/colo.c @@ -10,11 +10,9 @@ void colo_shutdown(void) { } -void *colo_process_incoming_thread(void *opaque) +int coroutine_fn colo_incoming_co(void) { - error_report("Impossible happend: trying to start COLO thread when COLO " - "module is not built in"); - abort(); + return 0; } void colo_checkpoint_delay_set(void) |