2013 July 29 qemu

QEMU migration analysis

MEMO

outgoing migration

migrate_fd_connect()
|-->migrate_thread()
  |-->qemu_savevm_state_begin()
  |-->qemu_savevm_state_pending()
  |-->qemu_savevm_state_iterate()
  |-->qemu_savevm_state_complete()

incoming migration

qemu_start_incoming_migration()
|-->tcp_start_incoming_migration()
  |-->tcp_accept_incoming_migration()
       |-->process_incoming_migration()
	    |-->process_incoming_migration_co() (coroutine)
		 |-->qemu_loadvm_state()
		 |-->qemu_announce_self()
		 |-->bdrv_clear_incoming_migration_all()
		 |-->bdrv_invalidate_cache_all()