Don't need to flush all VM's ram from cache, only flush the dirty pages since last checkpoint
Cc: Juan Quintela <quint...@redhat.com> Signed-off-by: Li Zhijian <lizhij...@cn.fujitsu.com> Signed-off-by: Zhang Chen <zhangchen.f...@cn.fujitsu.com> Signed-off-by: zhanghailiang <zhang.zhanghaili...@huawei.com> --- migration/ram.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/migration/ram.c b/migration/ram.c index 6227b94..e9ba740 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -2702,6 +2702,7 @@ int colo_init_ram_cache(void) migration_bitmap_rcu = g_new0(struct BitmapRcu, 1); migration_bitmap_rcu->bmap = bitmap_new(ram_cache_pages); migration_dirty_pages = 0; + memory_global_dirty_log_start(); return 0; @@ -2750,6 +2751,15 @@ void colo_flush_ram_cache(void) void *src_host; ram_addr_t offset = 0; + memory_global_dirty_log_sync(); + qemu_mutex_lock(&migration_bitmap_mutex); + rcu_read_lock(); + QLIST_FOREACH_RCU(block, &ram_list.blocks, next) { + migration_bitmap_sync_range(block->offset, block->used_length); + } + rcu_read_unlock(); + qemu_mutex_unlock(&migration_bitmap_mutex); + trace_colo_flush_ram_cache_begin(migration_dirty_pages); rcu_read_lock(); block = QLIST_FIRST_RCU(&ram_list.blocks); -- 1.8.3.1