From mboxrd@z Thu Jan 1 00:00:00 1970 From: Gerd Hoffmann Subject: Re: CONFIG_XEN_COMPAT_030002 broken? Date: Mon, 13 Nov 2006 17:47:47 +0100 Message-ID: <4558A1B3.8080409@suse.de> References: Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Return-path: In-Reply-To: List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Sender: xen-devel-bounces@lists.xensource.com Errors-To: xen-devel-bounces@lists.xensource.com To: Keir Fraser Cc: Xen devel list List-Id: xen-devel@lists.xenproject.org Keir Fraser wrote: >>> $subject says all. Running latest bits from the 3.0.2 testing tree, >>> trying to boot a 3.0.3 linux guest kernel with the compat option >>> enabled, doesn't boot on x86_64 (32bit works ok). Kernel dies very >>> early at boot: >> changeset 11226 is the culprit (stop setting _PAGE_USER for kernel pages). > > To fix this we'd need to make all the KERNPG_XXX macros into variables and > poke in PAGE_USER if running on an older version of Xen. As xen must be able to deal with PAGE_USER being set anyway (to deal with old guests) I'd simply make that a compile time option depending on CONFIG_XEN_COMPAT_030002, so we can avoid the extra cost of checking some variable at runtime ... What was the reason for that change btw? Just make the differences between native and paravirtualized smaller? cheers, Gerd -- Gerd Hoffmann http://www.suse.de/~kraxel/julika-dora.jpeg