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migration: Enter into COLO mode after migration if COLO is enabled

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Add a new migration state: MIGRATION_STATUS_COLO. Migration source side
enters this state after the first live migration successfully finished
if COLO is enabled by command 'migrate_set_capability x-colo on'.

We reuse migration thread, so the process of checkpointing will be handled
in migration thread.

Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Signed-off-by: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: Gonglei <arei.gonglei@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Reviewed-by: Amit Shah <amit.shah@redhat.com>
Signed-off-by: Amit Shah <amit@amitshah.net>
This commit is contained in:
zhanghailiang 2016-10-27 14:42:54 +08:00 • committed by Amit Shah
parent 5821ebf93b
commit 0b827d5e72
6 changed files with 80 additions and 6 deletions
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29
migration/colo.c
View file

@ -11,9 +11,38 @@
*/
#include "qemu/osdep.h"
#include "sysemu/sysemu.h"
#include "migration/colo.h"
#include "trace.h"
bool colo_supported(void)
{
return false;
}
bool migration_in_colo_state(void)
{
MigrationState *s = migrate_get_current();
return (s->state == MIGRATION_STATUS_COLO);
}
static void colo_process_checkpoint(MigrationState *s)
{
qemu_mutex_lock_iothread();
vm_start();
qemu_mutex_unlock_iothread();
trace_colo_vm_state_change("stop", "run");
/* TODO: COLO checkpoint savevm loop */
}
void migrate_start_colo_process(MigrationState *s)
{
qemu_mutex_unlock_iothread();
migrate_set_state(&s->state, MIGRATION_STATUS_ACTIVE,
MIGRATION_STATUS_COLO);
colo_process_checkpoint(s);
qemu_mutex_lock_iothread();
}