@@ -1621,6 +1621,7 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
int create_and_init_ram_cache(void)
{
RAMBlock *block;
+ int64_t ram_cache_pages = last_ram_offset() >> TARGET_PAGE_BITS;
rcu_read_lock();
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
@@ -1632,6 +1633,15 @@ int create_and_init_ram_cache(void)
}
rcu_read_unlock();
ram_cache_enable = true;
+ /*
+ * Start dirty log for Secondary VM, we use this dirty bitmap together with
+ * VM's cache RAM dirty bitmap to decide which page in cache should be
+ * flushed into VM's RAM.
+ */
+ migration_bitmap = bitmap_new(ram_cache_pages);
+ migration_dirty_pages = 0;
+ memory_global_dirty_log_start();
+
return 0;
out_locked:
@@ -1652,6 +1662,12 @@ void release_ram_cache(void)
ram_cache_enable = false;
+ if (migration_bitmap) {
+ memory_global_dirty_log_stop();
+ g_free(migration_bitmap);
+ migration_bitmap = NULL;
+ }
+
rcu_read_lock();
QLIST_FOREACH_RCU(block, &ram_list.blocks, next) {
if (block->host_cache) {