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Date: Mon, 29 Jul 2002 19:42:38 +0200
From: "J.A. Magallon" <jamagallon@able.es>
To: lkml <linux-kernel@vger.kernel.org>
Cc: Andrea Arcangeli <andrea@suse.de>
Subject: oopsen with rc3-aa3
Message-ID: <20020729174238.GA1919@714-cm.cps.unizar.es>
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Hi.

The new code in rc3aa3 makes a dual Xeon box hang on boot just
when stating migration threads. I get two simultaneous oops, one
for migration_thread=1 and =2. Decoded oops for one of them:

*pde = 00000000
CPU: 1
EIP: 0010:[<80119f9d>] Not tainted
Using defaults from ksymoops -t elf32-i386 -a i386
EFLAGS: 00010006
eax: 00002700 ebx: 000000ff ecx: 00000004 edx: 00000000
esi: 00000000 edi: 00000004 ebp: bffe7f80 esp: bffe7f40
ds: 0018 es: 0018 ss: 0018
Process migration_CPU1 (pid: 3, stackpage=bffe7000)
Stack: 00000000 00000004 0000000a bffe7fc8 ffffffff 00000001
       bffe634b ffffffff 00000001 00000000 0000000a 00000001
           802fe240 00000000 bffe6000 802fe240 bffe7fc0 8011a7e7
           802fe240 00000001 802fe240 8025c116 bffe633e bffe6000
Call Trace: [<8011a7e7>] [<8025c116>] [<8025c134>] [<8011c009>]
        [<80105000>] [<80105000>] [<80107256>] [<8011bec0>]
Code: 8b 42 14 c7 42 14 01 00 00 00 85 c0 0f 85 88 03 00 00 8b 52

>>EIP; 80119f9c <load_balance+ec/490>   <=====
Trace; 8011a7e6 <schedule+126/3a0>
Trace; 8025c116 <vsprintf+16/20>
Trace; 8025c134 <sprintf+14/20>
Trace; 8011c008 <migration_thread+148/320>
Trace; 80105000 <_stext+0/0>
Trace; 80105000 <_stext+0/0>
Trace; 80107256 <kernel_thread+26/30>
Trace; 8011bec0 <migration_thread+0/320>
Code;  80119f9c <load_balance+ec/490>
00000000 <_EIP>:
Code;  80119f9c <load_balance+ec/490>   <=====
   0:   8b 42 14                  mov    0x14(%edx),%eax   <=====
Code;  80119f9e <load_balance+ee/490>
   3:   c7 42 14 01 00 00 00      movl   $0x1,0x14(%edx)
Code;  80119fa6 <load_balance+f6/490>
   a:   85 c0                     test   %eax,%eax
Code;  80119fa8 <load_balance+f8/490>
   c:   0f 85 88 03 00 00         jne    39a <_EIP+0x39a> 8011a336 <load_balance+486/490>
Code;  80119fae <load_balance+fe/490>
  12:   8b 52 00                  mov    0x0(%edx),%edx

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