From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759845AbXEPIXc (ORCPT ); Wed, 16 May 2007 04:23:32 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756185AbXEPIX0 (ORCPT ); Wed, 16 May 2007 04:23:26 -0400 Received: from gw.goop.org ([64.81.55.164]:36413 "EHLO mail.goop.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755779AbXEPIXZ (ORCPT ); Wed, 16 May 2007 04:23:25 -0400 Message-ID: <464ABF7C.1000307@goop.org> Date: Wed, 16 May 2007 01:23:24 -0700 From: Jeremy Fitzhardinge User-Agent: Thunderbird 1.5.0.10 (X11/20070302) MIME-Version: 1.0 To: "H. Peter Anvin" CC: Andrew Morton , Linux Kernel Mailing List Subject: 2.6.22-rc1-mm1: boot failure under qemu Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org 2.6.22-rc1-mm1 doesn't boot for me under qemu or kvm. Under qemu it just hangs sullenly, but kvm gives a more useful dump: (qemu) exception 13 (0) rax 000000004050ffff rbx 0000000000009000 rcx 0000000000000000 rdx 0000000000007b00 rsi 000000000001fc05 rdi 0000000000040000 rsp 0000000000008f9a rbp 0000000000008100 r8 0000000000000000 r9 0000000000000000 r10 0000000000000000 r11 0000000000000000 r12 0000000000000000 r13 0000000000000000 r14 0000000000000000 r15 0000000000000000 rip 0000000000001062 rflags 00033046 cs 9000 (00090000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0) ds 9000 (00090000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0) es 8100 (00081000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0) ss 9000 (00090000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0) fs 9900 (00099000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0) gs 9000 (00090000/0000ffff p 1 dpl 3 db 0 s 1 type 3 l 0 g 0 avl 0) tr 0000 (30850000/00002088 p 1 dpl 0 db 0 s 0 type b l 0 g 0 avl 0) ldt 0000 (00000000/0000ffff p 1 dpl 0 db 0 s 0 type 2 l 0 g 0 avl 0) gdt fa4e4/30 idt 0/3ff cr0 60000010 cr2 0 cr3 0 cr4 0 cr8 0 efer 0 rip/eip 0x1062 seems to correspond to: else while (num != 0) tmp[i++] = digits[do_div(num, base)]; 1050: 66 89 f0 mov %esi,%eax 1053: 66 31 d2 xor %edx,%edx 1056: 66 f7 f5 div %ebp 1059: 66 89 c6 mov %eax,%esi 105c: 67 66 8b 44 24 28 addr32 mov 0x28(%esp),%eax 1062: 67 8a 14 10 addr32 mov (%eax,%edx,1),%dl 1066: 67 66 8b 44 24 2c addr32 mov 0x2c(%esp),%eax 106c: 67 88 54 04 3e addr32 mov %dl,0x3e(%esp,%eax,1) 0x1062 is in number (/home/jeremy/hg/xen/paravirt/linux/arch/i386/boot/printf.c:109). 104 i = 0; 105 if (num == 0) 106 tmp[i++] = '0'; 107 else 108 while (num != 0) 109 tmp[i++] = digits[do_div(num, base)]; 110 if (i > precision) 111 precision = i; 112 size -= precision; 113 if (!(type & (ZEROPAD + LEFT))) I haven't tried booting on real hardware, but this is a definite regression from the old setup code. J