[Xen-devel] Some questions about Xenstore&Xenbus

["房海峰" <fhf25@xxxxxxx>]

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

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