oops message when installing kdb on 2.6.31.8 - entering with KDB_ENTER

[krishnamurthy babu <babu_krishnamurthy@xxxxxxxxx>]

Dear developers and users,

I am trying to install kdb-v4.4-2.6.31-common-4.bz2 and kdb-v4.4-2.6.31-x86-4.bz2

on 2.6.31.8 stock-kernel  - the stock kernel is patched and installed in Fedora 12

running on  an OPTIPLEX - 780 from DELL. 

1. the patches are applied cleanly

2. configuration and compilation is done cleanly

3. when I try to use the pause from the USB-UHCI keyboard, the system freezes

4. so< i wrote a simple module that can just load and enter KDB using 

    KDB_ENTER() 

5. when I did that in a uniprocess mode(maxcpus=1), the following oops message

    was dumped. 

    Please let me know, if there are any patches for this particular problem.

Regards,

babu K 

=======================================================

Hello, world

BUG: unable to handle kernel paging request at c05effb1

IP: [<c0784dd2>] kdba_setjmp+0x1a/0x49

*pdpt = 0000000000af5001 *pde = 00000000004001e1 

Oops: 0003 [#1] SMP 

last sysfs file: /sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5/start

Modules linked in: hello(+) dm_multipath kvm uinput snd_hda_codec_analog snd_hda_intel snd_hda_codec snd_hwdep snd_seq snd_seq_device ppdev parport_pc dcdbas snd_pcm snd_timer pcspkr snd iTCO_wdt iTCO_vendor_support parport serio_raw i2c_i801 soundcore snd_page_alloc e1000e wmi ata_generic pata_acpi usb_storage i915 drm i2c_algo_bit i2c_core video output [last unloaded: scsi_wait_scan]

Pid: 666, comm: insmod Not tainted (2.6.31.8-desd_dssd_kernel_prg_mar2010 #1) OptiPlex 780                 

EIP: 0060:[<c0784dd2>] EFLAGS: 00010046 CPU: 0

EIP is at kdba_setjmp+0x1a/0x49

EAX: c05effb1 EBX: c096c897 ECX: 0700f000 EDX: f7e01000

ESI: c4835860 EDI: 00000000 EBP: c4dc9e20 ESP: c4dc9e1c

 DS: 007b ES: 007b FS: 00d8 GS: 00e0 SS: 0068

Process insmod (pid: 666, ti=c4dc8000 task=c4835860 task.ti=c4dc8000)

Stack:

 424d3a19 c4dc9eb0 c05effb1 f7e01000 c4dc9e94 00000000 fffffff7 00000000

<0> 00000001 00000004 00000001 c4dc9f34 424d3a19 f7030000 c4dc9e68 c0691d13

<0> f7030000 00000000 424d3a19 c4dc9e94 c0691f2c 014d3a19 00000000 424d3a19

Call Trace:

 [<c05effb1>] ? kdb_main_loop+0x5d8/0x978

 [<c0691d13>] ? notify_update+0x30/0x43

 [<c0691f2c>] ? vt_console_print+0x206/0x225

 [<c0836226>] ? notifier_call_chain+0x37/0x67

 [<c05eb6ad>] ? kdb_save_running+0x64/0x8e

 [<c05eb6be>] ? kdb_save_running+0x75/0x8e

 [<c0785a28>] ? kdba_main_loop+0x2b/0x4e

 [<c05edf37>] ? kdb+0x6d5/0x9e9

 [<f9b2d034>] ? hello_init+0x0/0x4c [hello]

 [<c040a54f>] ? kdb_call+0x37/0x3c

 [<f9b2d034>] ? hello_init+0x0/0x4c [hello]

 [<c083007b>] ? hrtimer_cpu_notify+0x10/0x174

 [<f9b2d068>] ? hello_init+0x34/0x4c [hello]

 [<c0403085>] ? do_one_initcall+0x5c/0x15b

 [<c04776d4>] ? sys_init_module+0xc6/0x1ea

 [<c04098db>] ? sysenter_do_call+0x12/0x28

Code: fc 65 33 05 14 00 00 00 74 05 e8 06 49 cc ff c9 c3 55 89 e5 83 ec 04 0f 1f 44 00 00 65 a1 14 00 00 00 89 45 fc 31 c0 8b 44 24 08 <89> 18 89 70 04 89 78 08 8b 0c 24 89 48 0c 8d 4c 24 08 89 48 10 

EIP: [<c0784dd2>] kdba_setjmp+0x1a/0x49 SS:ESP 0068:c4dc9e1c

CR2: 00000000c05effb1

---[ end trace 756d9c46b5afd5cf ]---

 

========================================================