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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: Li Zhijian <lizhijian@cn.fujitsu.com>
Signed-off-by: Zhang Chen <zhangckid@gmail.com>
Signed-off-by: Zhang Chen <chen.zhang@intel.com>
Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com>
Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Jason Wang <jasowang@redhat.com>
This commit is contained in:
zhanghailiang 2018-09-03 12:38:55 +08:00 committed by Jason Wang
parent 3f6df99d9d
commit d1955d2219
1 changed files with 9 additions and 0 deletions
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9
migration/ram.c
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@ -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);