linux-kernel - linux page table

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Date:	Sat, 1 Sep 2012 12:30:59 -0700
From:	Xin Tong <xerox.time.tech@...il.com>
To:	linux-kernel <linux-kernel@...r.kernel.org>
Subject: linux page table

When a process is created in Linux, corresponding page table is
implemented. In the current x86 linux, the page table is a multi-level
page table and CR3 points to the first level of the page table.  I
have 2 questions.

1. is the value in CR3 virtual address or physical address ?
2. can the address of the first level of the page table during a
process's lifetime change ?
3. can two different processes have their CR3 being the same value
even though they have different first level page tables ?

Thanks
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