@@ -1277,6 +1277,7 @@ static int ram_load(QEMUFile *f, void *opaque, int version_id)
void 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) {
@@ -1286,6 +1287,14 @@ void create_and_init_ram_cache(void)
rcu_read_unlock();
ram_cache_enable = true;
+ /*
+ * Start dirty log for slave VM, we will 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();
}
void release_ram_cache(void)
@@ -1294,6 +1303,12 @@ 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) {
g_free(block->host_cache);
we will 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. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> --- arch_init.c | 15 +++++++++++++++ 1 file changed, 15 insertions(+)