From: "Dr. David Alan Gilbert" <[email protected]>
Signed-off-by: Dr. David Alan Gilbert <[email protected]>
---
include/migration/migration.h | 1 +
migration.c | 9 +++++++++
qapi-schema.json | 6 +++++-
3 files changed, 15 insertions(+), 1 deletion(-)
diff --git a/include/migration/migration.h b/include/migration/migration.h
index a1ed7a3..35ad1f6 100644
--- a/include/migration/migration.h
+++ b/include/migration/migration.h
@@ -171,6 +171,7 @@ void migrate_add_blocker(Error *reason);
*/
void migrate_del_blocker(Error *reason);
+bool migrate_postcopy_ram(void);
bool migrate_rdma_pin_all(void);
bool migrate_zero_blocks(void);
diff --git a/migration.c b/migration.c
index e69a49e..67cdfd6 100644
--- a/migration.c
+++ b/migration.c
@@ -612,6 +612,15 @@ bool migrate_rdma_pin_all(void)
return s->enabled_capabilities[MIGRATION_CAPABILITY_RDMA_PIN_ALL];
}
+bool migrate_postcopy_ram(void)
+{
+ MigrationState *s;
+
+ s = migrate_get_current();
+
+ return s->enabled_capabilities[MIGRATION_CAPABILITY_X_POSTCOPY_RAM];
+}
+
bool migrate_auto_converge(void)
{
MigrationState *s;
diff --git a/qapi-schema.json b/qapi-schema.json
index b11aad2..eac3739 100644
--- a/qapi-schema.json
+++ b/qapi-schema.json
@@ -491,10 +491,14 @@
# @auto-converge: If enabled, QEMU will automatically throttle down the guest
# to speed up convergence of RAM migration. (since 1.6)
#
+# @x-postcopy-ram: Start executing on the migration target before all of RAM
has been
+# migrated, pulling the remaining pages along as needed. NOTE: If the
+# migration fails during postcopy the VM will fail. (since 2.2)
+#
# Since: 1.2
##
{ 'enum': 'MigrationCapability',
- 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks'] }
+ 'data': ['xbzrle', 'rdma-pin-all', 'auto-converge', 'zero-blocks',
'x-postcopy-ram'] }
##
# @MigrationCapabilityStatus
--
1.9.3
