From mboxrd@z Thu Jan 1 00:00:00 1970 From: Avi Kivity Subject: Re: kvm-67: kernel panic while booting debian-40r3-i386-businesscard.iso Date: Fri, 02 May 2008 13:12:14 +0300 Message-ID: <481AE8FE.5060904@qumranet.com> References: <1209401422.30950.27.camel@polaris> Mime-Version: 1.0 Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Cc: kvm-devel@lists.sourceforge.net To: Jan Luebbe Return-path: In-Reply-To: <1209401422.30950.27.camel@polaris> List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: kvm-devel-bounces@lists.sourceforge.net Errors-To: kvm-devel-bounces@lists.sourceforge.net List-Id: kvm.vger.kernel.org Jan Luebbe wrote: > Hi! > > I'm preparing kvm-67 for debian. While testing i noticed a problem: > > When booting the debian installer from the official CD [1] this problem: > > Call Trace: > [] kmem_cache_create+0x15e/0x410 > Code: c3 57 56 53 89 c6 9c 5f fa 8b 08 83 39 00 74 12 c7 41 0c 01 00 00 > 00 8b 01 > 48 89 01 8b 5c 81 10 eb 07 e8 a5 fb ff ff 89 c3 57 9d <0f> 0d 0b 90 85 > db 74 1b > 8b 56 10 31 c0 89 d1 c1 e9 02 89 df f3 > EIP: [] kmem_cache_zalloc+0x2a/0x53 SS:ESP 0068:c030ff80 > <0>Kernel panic - not syncing: Attempted to kill the idle task! > 0f 0d 0b prefetchw (%ebx) This is an AMD 3Dnow! instruction, which is not supported on Intel processors. I guess the 3Dnow! cpuid bit leaked in via the qemu merge. I guess two fixes are needed: - remove the 3Dnow! bit - add emulation for prefetchw (easy, as it doesn't need to do anything) to support live migration from AMD to Intel -- I have a truly marvellous patch that fixes the bug which this signature is too narrow to contain. ------------------------------------------------------------------------- This SF.net email is sponsored by the 2008 JavaOne(SM) Conference Don't miss this year's exciting event. There's still time to save $100. Use priority code J8TL2D2. http://ad.doubleclick.net/clk;198757673;13503038;p?http://java.sun.com/javaone