On Mon, Jun 04, 2018 at 05:55:15PM +0800, guangrong.xiao@xxxxxxxxx wrote: > From: Xiao Guangrong <xiaoguangrong@xxxxxxxxxxx> > > Try to hold src_page_req_mutex only if the queue is not > empty Pure question: how much this patch would help? Basically if you are running compression tests then I think it means you are with precopy (since postcopy cannot work with compression yet), then here the lock has no contention at all. Regards, -- Peter Xu