CPR preserves memory in place, so there is no need to track dirty memory.
By skipping it, CPR can support devices that do not support tracking.
Signed-off-by: Steve Sistare <steven.sist...@oracle.com>
---
system/memory.c | 11 +++++++++++
1 file changed, 11 insertions(+)
diff --git a/system/memory.c b/system/memory.c
index b7548bf112..aef584e638 100644
--- a/system/memory.c
+++ b/system/memory.c
@@ -27,6 +27,7 @@
#include "exec/memory-internal.h"
#include "exec/ram_addr.h"
+#include "migration/misc.h"
#include "sysemu/kvm.h"
#include "sysemu/runstate.h"
#include "sysemu/tcg.h"
@@ -2947,6 +2948,11 @@ bool memory_global_dirty_log_start(unsigned int flags,
Error **errp)
assert(flags && !(flags & (~GLOBAL_DIRTY_MASK)));
+ /* CPR preserves memory in place, so no need to track dirty memory */
+ if (migrate_mode() != MIG_MODE_NORMAL) {
+ return true;
+ }
+
if (vmstate_change) {
/* If there is postponed stop(), operate on it first */
postponed_stop_flags &= ~flags;
@@ -3021,6 +3027,11 @@ static void memory_vm_change_state_handler(void *opaque,
bool running,
void memory_global_dirty_log_stop(unsigned int flags)
{
+ /* CPR preserves memory in place, so no need to track dirty memory */
+ if (migrate_mode() != MIG_MODE_NORMAL) {
+ return;
+ }
+
if (!runstate_is_running()) {
/* Postpone the dirty log stop, e.g., to when VM starts again */
if (vmstate_change) {
--
2.39.3
