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We will migrate parts of dirty pages backgroud lively during the gap time of two checkpoints, without this modification, it will not work because ram_save_iterate() will check it before send RAM_SAVE_FLAG_EOS at the end of it. Signed-off-by: zhanghailiang <zhang.zhanghailiang@huawei.com> Message-Id: <20200224065414.36524-7-zhang.zhanghailiang@huawei.com> Reviewed-by: Dr. David Alan Gilbert <dgilbert@redhat.com> Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>