Hi, When i usd msg.type = XS_WATCH ,write this in xenstore ring, and call hypercall_event_channle_op, after that, when does it return ,and how could i get the return value, or what part of code i can reference? Thanks. Hu shaolong _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel