From mboxrd@z Thu Jan  1 00:00:00 1970
From: tgh <tianguanhua@ncic.ac.cn>
Subject: question about grant table
Date: Tue, 19 Jun 2007 09:19:26 +0800
Message-ID: <46772F1E.4060006@ncic.ac.cn>
References: <C1761DE8.4168%Keir.Fraser@cl.cam.ac.uk>
	<1162913696.4141.28.camel@moonstone.uk.level5networks.com>
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hi
I try to read the granttable code of xen,I am confused about some fields
in the struct grant_table,such as 
struct grant_entry **shared; 
struct active_grant_entry **active; 
struct grant_mapping **maptrack; 

what are the functions for the three structures ?
in the grant_table_create() function,each entry of three structures is allocated a page frame,is it right?
if it is,when we try to use a grant page ,three pages are needed to be allocated for matadata,or how does it work?


I am confused about it

could you help me
Thanks in advance