From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: KVM 29: Page fault in kernel mode while booting GNU/kFreeBSD Date: Fri, 20 Jul 2007 09:50:11 +0300 Message-ID: <46A05B23.50409@qumranet.com> References: <20070714170618.GB6527@hall.aurel32.net> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org To: Aurelien Jarno Return-path: In-Reply-To: <20070714170618.GB6527-OqXK5JiLQY5aJl8KAwiEcA@public.gmane.org> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org Errors-To: kvm-devel-bounces-5NWGOfrQmneRv+LV9MX5uipxlwaOVQ5f@public.gmane.org List-Id: kvm.vger.kernel.org Aurelien Jarno wrote: > Hi, > > I have just updated my system from kvm 28 to kvm 29, and a GNU/kFreeBSD > amd64 system fails to boot with the following error: > > Fatal trap 12 with interrupts disabled > > > Fatal trap 12: page fault while in kernel mode > fault virtual address = 0x7aa93e0 > fault code = supervisor read, page not present > instruction pointer = 0x8:0xffffffff80598b36 > stack pointer = 0x10:0xffffffff87c556b0 > frame pointer = 0x10:0xffffff0007aa9260 > code segment = base 0x00, lmit 0xfffff, type 0x1b > = DPL 0, pres 1, long 1, def32 0, gran 1 > processor eflags = resume, IOPL = 0 > current process = 1 (init) > trap number = 12 > panic: page fault > > > This is on an machine with an Athlon64 X2 CPU. > > As it was running fine with kvm 28, I tried to mix kvm 28 and kvm 29. It > fails when using modules from kvm 29, whatever the version of the > userland part. This looks like a problem in the kernel modules. > > Please also note that GNU/kFreeBSD i386 is working fine with kvm 29 on > the same machine. > > Please tell me what I can do to help debugging this problem. > Alternatively I have uploaded an image to reproduce the problem here: > http://temp.aurel32.net/kfreebsd-amd64.img.g I've downloaded the image and booted it three times using kvm HEAD. Each time I got to the login prompt. Is this always reproducible? Can you check with kvm HEAD (not that I think of anything that could have fixed this). -- Do not meddle in the internals of kernels, for they are subtle and quick to panic. ------------------------------------------------------------------------- This SF.net email is sponsored by: Microsoft Defy all challenges. Microsoft(R) Visual Studio 2005. http://clk.atdmt.com/MRT/go/vse0120000070mrt/direct/01/