From mboxrd@z Thu Jan 1 00:00:00 1970 From: BVK Chaitanya Subject: On x86-32 Xen Address Space Date: Sat, 30 Aug 2008 09:50:35 +0530 Message-ID: <48B8CA93.4060609@symantec.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit Return-path: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Xen-devel@lists.xensource.com List-Id: xen-devel@lists.xenproject.org Hi, I was going through Xen address space layout, and i was thinking Xen uses upper 64MB in x86-32 mode and 168MB in x86-32 PAE mode. But from xen/include/asm-x86/config.h it is not clear where different mappings are for 32-bit and 32-bit PAE modes. I see that FRAMETABLE_MBYTES is hard coded as 96, and other macros are also summing up to 168MB, not 64MB. Does it mean, now Xen takes 168MB in both modes? or am i missing anything? thanks, -- bvk-chaitanya