@@ -2861,6 +2861,7 @@ Enable/Disable migration capabilities
- "compress": use multiple compression threads to accelerate live migration
- "events": generate events for each migration state change
- "postcopy-ram": postcopy mode for live migration
+- "x-colo": COarse-Grain LOck Stepping (COLO) for Non-stop Service
Arguments:
@@ -2882,6 +2883,7 @@ Query current migration capabilities
- "compress": Multiple compression threads state (json-bool)
- "events": Migration state change event state (json-bool)
- "postcopy-ram": postcopy ram state (json-bool)
+ - "x-colo": COarse-Grain LOck Stepping for Non-stop Service (json-bool)
Arguments:
@@ -2895,7 +2897,8 @@ Example:
{"state": false, "capability": "zero-blocks"},
{"state": false, "capability": "compress"},
{"state": true, "capability": "events"},
- {"state": false, "capability": "postcopy-ram"}
+ {"state": false, "capability": "postcopy-ram"},
+ {"state": false, "capability": "x-colo"}
]}
migrate-set-parameters
new file mode 100644
@@ -0,0 +1,20 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 FUJITSU LIMITED
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#ifndef QEMU_COLO_H
+#define QEMU_COLO_H
+
+#include "qemu-common.h"
+
+bool colo_supported(void);
+
+#endif
@@ -298,6 +298,7 @@ int xbzrle_decode_buffer(uint8_t *src, int slen, uint8_t *dst, int dlen);
int migrate_use_xbzrle(void);
int64_t migrate_xbzrle_cache_size(void);
+bool migrate_colo_enabled(void);
int64_t xbzrle_cache_resize(int64_t new_size);
@@ -1,5 +1,6 @@
common-obj-y += migration.o socket.o fd.o exec.o
common-obj-y += tls.o
+common-obj-$(CONFIG_COLO) += colo.o
common-obj-y += vmstate.o
common-obj-y += qemu-file.o
common-obj-y += qemu-file-channel.o
new file mode 100644
@@ -0,0 +1,19 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 FUJITSU LIMITED
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "migration/colo.h"
+
+bool colo_supported(void)
+{
+ return false;
+}
@@ -36,6 +36,7 @@
#include "exec/address-spaces.h"
#include "io/channel-buffer.h"
#include "io/channel-tls.h"
+#include "migration/colo.h"
#define MAX_THROTTLE (32 << 20) /* Migration transfer speed throttling */
@@ -531,6 +532,9 @@ MigrationCapabilityStatusList *qmp_query_migrate_capabilities(Error **errp)
caps = NULL; /* silence compiler warning */
for (i = 0; i < MIGRATION_CAPABILITY__MAX; i++) {
+ if (i == MIGRATION_CAPABILITY_X_COLO && !colo_supported()) {
+ continue;
+ }
if (head == NULL) {
head = g_malloc0(sizeof(*caps));
caps = head;
@@ -733,6 +737,14 @@ void qmp_migrate_set_capabilities(MigrationCapabilityStatusList *params,
}
for (cap = params; cap; cap = cap->next) {
+ if (cap->value->capability == MIGRATION_CAPABILITY_X_COLO) {
+ if (!colo_supported()) {
+ error_setg(errp, "COLO is not currently supported, please"
+ " configure with --enable-colo option in order to"
+ " support COLO feature");
+ continue;
+ }
+ }
s->enabled_capabilities[cap->value->capability] = cap->value->state;
}
@@ -1713,6 +1725,12 @@ fail:
MIGRATION_STATUS_FAILED);
}
+bool migrate_colo_enabled(void)
+{
+ MigrationState *s = migrate_get_current();
+ return s->enabled_capabilities[MIGRATION_CAPABILITY_X_COLO];
+}
+
/*
* Master migration thread on the source VM.
* It drives the migration and pumps the data down the outgoing channel.
@@ -574,11 +574,16 @@
# been migrated, pulling the remaining pages along as needed. NOTE: If
# the migration fails during postcopy the VM will fail. (since 2.6)
#
+# @x-colo: If enabled, migration will never end, and the state of the VM on the
+# primary side will be migrated continuously to the VM on secondary
+# side, this process is called COarse-Grain LOck Stepping (COLO) for
+# Non-stop Service. (since 2.8)
+#
# Since: 1.2
##
{ 'enum': 'MigrationCapability',
'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
- 'compress', 'events', 'postcopy-ram'] }
+ 'compress', 'events', 'postcopy-ram', 'x-colo'] }
##
# @MigrationCapabilityStatus
@@ -48,3 +48,4 @@ stub-obj-y += iohandler.o
stub-obj-y += smbios_type_38.o
stub-obj-y += ipmi.o
stub-obj-y += pc_madt_cpu_entry.o
+stub-obj-y += migration-colo.o
new file mode 100644
@@ -0,0 +1,19 @@
+/*
+ * COarse-grain LOck-stepping Virtual Machines for Non-stop Service (COLO)
+ * (a.k.a. Fault Tolerance or Continuous Replication)
+ *
+ * Copyright (c) 2016 HUAWEI TECHNOLOGIES CO., LTD.
+ * Copyright (c) 2016 FUJITSU LIMITED
+ * Copyright (c) 2016 Intel Corporation
+ *
+ * This work is licensed under the terms of the GNU GPL, version 2 or
+ * later. See the COPYING file in the top-level directory.
+ */
+
+#include "qemu/osdep.h"
+#include "migration/colo.h"
+
+bool colo_supported(void)
+{
+ return false;
+}