From mboxrd@z Thu Jan 1 00:00:00 1970 Received: by zproxy.gmail.com with SMTP id k1so536543nzf for ; Sat, 22 Oct 2005 09:09:44 -0700 (PDT) Message-ID: Date: Sat, 22 Oct 2005 21:39:43 +0530 From: Nitin Gupta Subject: a basic question MIME-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 8BIT Content-Disposition: inline Sender: owner-linux-mm@kvack.org Return-Path: To: linux-mm@kvack.org List-ID: Hi, These are the questions that have been troubling me for long time. I'm beginning to work on a vmm project, so kindly spare a min to answer these: - How does processor know that 3GB-4GB is mapped linearly on first 1GB of memory. Is there a pagetable for this segment mapping it linearly? - Why isn't it like this - userspace tasks have 4GB virtual address space and for kernel also a 4GB virtual address space that is linearly mapped to fist 4GB of memory. Thanks -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org