COLO will copy all memory in a RAM block, disable discarding of RAM.
Reviewed-by: Dr. David Alan Gilbert <[email protected]>
Tested-by: Lukas Straub <[email protected]>
Cc: "Michael S. Tsirkin" <[email protected]>
Cc: Hailiang Zhang <[email protected]>
Cc: Juan Quintela <[email protected]>
Cc: "Dr. David Alan Gilbert" <[email protected]>
Signed-off-by: David Hildenbrand <[email protected]>
---
include/migration/colo.h | 2 +-
migration/migration.c | 8 +++++++-
migration/savevm.c | 11 +++++++++--
3 files changed, 17 insertions(+), 4 deletions(-)
diff --git a/include/migration/colo.h b/include/migration/colo.h
index 1636e6f907..768e1f04c3 100644
--- a/include/migration/colo.h
+++ b/include/migration/colo.h
@@ -25,7 +25,7 @@ void migrate_start_colo_process(MigrationState *s);
bool migration_in_colo_state(void);
/* loadvm */
-void migration_incoming_enable_colo(void);
+int migration_incoming_enable_colo(void);
void migration_incoming_disable_colo(void);
bool migration_incoming_colo_enabled(void);
void *colo_process_incoming_thread(void *opaque);
diff --git a/migration/migration.c b/migration/migration.c
index 14856cc930..0f6799f5d2 100644
--- a/migration/migration.c
+++ b/migration/migration.c
@@ -338,12 +338,18 @@ bool migration_incoming_colo_enabled(void)
void migration_incoming_disable_colo(void)
{
+ ram_block_discard_disable(false);
migration_colo_enabled = false;
}
-void migration_incoming_enable_colo(void)
+int migration_incoming_enable_colo(void)
{
+ if (ram_block_discard_disable(true)) {
+ error_report("COLO: cannot disable RAM discard");
+ return -EBUSY;
+ }
migration_colo_enabled = true;
+ return 0;
}
void migrate_add_address(SocketAddress *address)
diff --git a/migration/savevm.c b/migration/savevm.c
index c00a6807d9..19b4f9600d 100644
--- a/migration/savevm.c
+++ b/migration/savevm.c
@@ -2111,8 +2111,15 @@ static int
loadvm_handle_recv_bitmap(MigrationIncomingState *mis,
static int loadvm_process_enable_colo(MigrationIncomingState *mis)
{
- migration_incoming_enable_colo();
- return colo_init_ram_cache();
+ int ret = migration_incoming_enable_colo();
+
+ if (!ret) {
+ ret = colo_init_ram_cache();
+ if (ret) {
+ migration_incoming_disable_colo();
+ }
+ }
+ return ret;
}
/*
--
2.26.2
