On Thu, May 09, 2013 at 08:40:21AM +0800, Liu Ping Fan wrote: > From: Liu Ping Fan <pingf...@linux.vnet.ibm.com> > > Hosts threads which handle vring should have high MemoryListener priority > than kvm. For currently code, take the following scenario: > kvm_region_add() run earlier before vhost_region_add(), then in guest, > vring's desc[i] can refer to addressX in the new region known by guest. > But vhost does not know this new region yet, and the vring handler will > fail.
Is there a concrete scenario where this happens? I can think of situations like the ioeventfd being readable before vhost/hostmem is populated. But I don't see how that's related to the priority of kvm_region_add(). Stefan
