hi, Keir: Now i am studying the source code of Xenbus (version 3.1). I found that, in "xenbus_init()", it seems the xenbus need allocate a page for xen_store_mfn in Dom0, while in DomU the value of xen_store_mfn can be obtained from "xen_store_info". So, i guess that every domain has a machine page for xenstore-ring-buffer, that is xen_store_mfn. But, i am puzzled as follows: if xenbus is the client, is xenstored in Dom0 the server, and is xen_store_mfn the communication channel between them? where can i find the allocation for xen_store_mfn? is the xen_store_mfn different for per domain? can i switch off the communication between xenbus and xenstored after i successfully logined into the DomainU? thanks a lot! Haifeng Fang _______________________________________________ Xen-devel mailing list Xen-devel@lists.xensource.com http://lists.xensource.com/xen-devel