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Split out end of migration code from migration_thread 

The code that gets run at the end of the migration process
is getting large, and I'm about to add more for postcopy.
Split it into a separate function.

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Message-Id: <1439463094-5394-3-git-send-email-dgilbert@redhat.com>
Reviewed-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Amit Shah <amit.shah@redhat.com>
This commit is contained in:
Dr. David Alan Gilbert 2015-08-13 11:51:31 +01:00 committed by Amit Shah
parent 2f68e39956
commit 09f6c85e39
2 changed files with 49 additions and 28 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

75
migration/migration.c
View File

@ -913,6 +913,50 @@ int64_t migrate_xbzrle_cache_size(void)
return s->xbzrle_cache_size;
}
/**
* migration_completion: Used by migration_thread when there's not much left.
* The caller 'breaks' the loop when this returns.
*
* @s: Current migration state
* @*old_vm_running: Pointer to old_vm_running flag
* @*start_time: Pointer to time to update
*/
static void migration_completion(MigrationState *s, bool *old_vm_running,
int64_t *start_time)
{
int ret;
qemu_mutex_lock_iothread();
*start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
*old_vm_running = runstate_is_running();
ret = global_state_store();
if (!ret) {
ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
if (ret >= 0) {
qemu_file_set_rate_limit(s->file, INT64_MAX);
qemu_savevm_state_complete(s->file);
}
}
qemu_mutex_unlock_iothread();
if (ret < 0) {
goto fail;
}
if (qemu_file_get_error(s->file)) {
trace_migration_completion_file_err();
goto fail;
}
migrate_set_state(s, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_COMPLETED);
return;
fail:
migrate_set_state(s, MIGRATION_STATUS_ACTIVE, MIGRATION_STATUS_FAILED);
}
/* migration thread support */
static void *migration_thread(void *opaque)
@ -943,34 +987,9 @@ static void *migration_thread(void *opaque)
if (pending_size && pending_size >= max_size) {
qemu_savevm_state_iterate(s->file);
} else {
int ret;
qemu_mutex_lock_iothread();
start_time = qemu_clock_get_ms(QEMU_CLOCK_REALTIME);
qemu_system_wakeup_request(QEMU_WAKEUP_REASON_OTHER);
old_vm_running = runstate_is_running();
ret = global_state_store();
if (!ret) {
ret = vm_stop_force_state(RUN_STATE_FINISH_MIGRATE);
if (ret >= 0) {
qemu_file_set_rate_limit(s->file, INT64_MAX);
qemu_savevm_state_complete(s->file);
}
}
qemu_mutex_unlock_iothread();
if (ret < 0) {
migrate_set_state(s, MIGRATION_STATUS_ACTIVE,
MIGRATION_STATUS_FAILED);
break;
}
if (!qemu_file_get_error(s->file)) {
migrate_set_state(s, MIGRATION_STATUS_ACTIVE,
MIGRATION_STATUS_COMPLETED);
break;
}
trace_migration_thread_low_pending(pending_size);
migration_completion(s, &old_vm_running, &start_time);
break;
}
}

2
trace-events
View File

@ -1420,6 +1420,8 @@ migrate_transferred(uint64_t tranferred, uint64_t time_spent, double bandwidth,
migrate_state_too_big(void) ""
migrate_global_state_post_load(const char *state) "loaded state: %s"
migrate_global_state_pre_save(const char *state) "saved state: %s"
migration_completion_file_err(void) ""
migration_thread_low_pending(uint64_t pending) "%" PRIu64
# migration/rdma.c
qemu_rdma_accept_incoming_migration(void) ""