Commit d1955d22 authored by zhanghailiang's avatar zhanghailiang Committed by Jason Wang
Browse files

COLO: flush host dirty ram from cache 



Don't need to flush all VM's ram from cache, only
flush the dirty pages since last checkpoint

Signed-off-by: default avatarLi Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: default avatarZhang Chen <zhangckid@gmail.com>
Signed-off-by: default avatarZhang Chen <chen.zhang@intel.com>
Signed-off-by: default avatarzhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: default avatarDr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: default avatarJason Wang <jasowang@redhat.com>
parent 3f6df99d

migration/ram.c

+9 −0
Original line number Diff line number Diff line
@@ -3714,6 +3714,7 @@ int colo_init_ram_cache(void) 
    }

    ram_state = g_new0(RAMState, 1);

    ram_state->migration_dirty_pages = 0;

    memory_global_dirty_log_start();



    return 0;
@@ -3735,6 +3736,7 @@ void colo_release_ram_cache(void) 
{

    RAMBlock *block;



    memory_global_dirty_log_stop();

    RAMBLOCK_FOREACH_MIGRATABLE(block) {

        g_free(block->bmap);

        block->bmap = NULL;
@@ -3985,6 +3987,13 @@ static void colo_flush_ram_cache(void) 
    void *src_host;

    unsigned long offset = 0;



    memory_global_dirty_log_sync();

    rcu_read_lock();

    RAMBLOCK_FOREACH_MIGRATABLE(block) {

        migration_bitmap_sync_range(ram_state, block, 0, block->used_length);

    }

    rcu_read_unlock();



    trace_colo_flush_ram_cache_begin(ram_state->migration_dirty_pages);

    rcu_read_lock();

    block = QLIST_FIRST_RCU(&ram_list.blocks);