Linux 2.6.24 L4FB and VGA_CONSOLE

[Marc CHALAND]

Hi,

I made a svn up into l4linux-2.6, made an oldconfig and encountered
some problems with lxevent and... cron (???). Problem with lxevent,
was into rmgr_init_ping_call: _dice_msg_buffer was NULL.

So I decided to purge all build directories (fiasco, build dir,
install dir and l4linux). I edited a new configuration for l4linux but
I encountered a problem : I cannot disable VGA_CONSOLE if I don't use
EMBEDDED. So I decided to set it. But, now, I've got some stability
problems : I get the following message :

---------------------------------------------------------------------------------------------------------------------------------
KERNEL: set_tls: non-existing thread 003401e1

KERNEL: set_ldt: non-existing task 0.
Trap: 13: 0000 [#1]
Modules linked in:

Pid: 1070, comm: consolechars Not tainted (2.6.24-l4 #14)
EIP: ff7c:[<00405055>] EFLAGS: 00010246 CPU: 0
EIP is at l4x_switch_to+0xd0/0xd3
EAX: 1003cc60 EBX: 00000018 ECX: 00000000 EDX: 00000000
ESI: 003401e1 EDI: 1003ca80 EBP: 1081013c ESP: 108139a0
 DS: 0000 ES: 4280 FS: 0023 GS: 0043 SS: 0023
Process consolechars (pid: 1070, ti=10812000 task=1003ca80 task.ti=108d0000)
Stack: 108139a8 00000000 1003ca80 10810000 00000400 0054da88 005f0fbc 10810000
       00000400 1003ca80 10812000 108139e8 ffff950d 00000400 0000000b 0054dd5b
       108139e8 ffff950d 005f67b0 005f67b0 ffff950d 0041923c 10810000 005f5f00
Call Trace:
 [<0054da88>] schedule+0x171/0x1bb
 [<0054dd5b>] schedule_timeout+0x7b/0x99
 [<0041923c>] process_timeout+0x0/0x9
 [<0045672f>] do_select+0x397/0x3ee
 [<00456d5f>] __pollwait+0x0/0xaf
 [<0040eeff>] default_wake_function+0x0/0x14
 [<0049f877>] __make_request+0x472/0x4a8
 [<0040e891>] update_curr+0x52/0xc8
 [<0040eb9b>] dequeue_entity+0xb/0x2a
 [<0040fbbf>] dequeue_task_fair+0x1b/0x2f
 [<0040f644>] finish_task_switch+0x1f/0x50
 [<0054dab4>] schedule+0x19d/0x1bb
 [<0054dcca>] io_schedule+0xb/0x12
 [<00467424>] sync_buffer+0x3b/0x40
 [<0054debd>] __wait_on_bit+0x53/0x5c
 [<004673e9>] sync_buffer+0x0/0x40
 [<004673e9>] sync_buffer+0x0/0x40
 [<0054df28>] out_of_line_wait_on_bit+0x62/0x6a
 [<00421d9c>] wake_bit_function+0x0/0x34
 [<004820b3>] __ext3_get_inode_loc+0x29e/0x2f6
 [<00448a95>] kmem_cache_alloc+0x66/0x9e
 [<0045a1da>] __d_lookup+0x97/0xd5
 [<0045a1da>] __d_lookup+0x97/0xd5
 [<00451dd2>] do_lookup+0x59/0x16b
 [<00453837>] __link_path_walk+0x930/0xa72
 [<0045a6a3>] dput+0x2a/0xe5
 [<00453837>] __link_path_walk+0x930/0xa72
 [<0045d5ea>] mntput_no_expire+0x1c/0x5c
 [<0045697e>] core_sys_select+0x1f8/0x2ae
 [<00454514>] __user_walk_fd+0x43/0x4c
 [<00449151>] kmem_cache_free+0x40/0x93
 [<00452d6f>] getname+0x68/0xa2
 [<0044e26d>] cp_new_stat64+0xff/0x111
 [<00456eb3>] sys_select+0xa5/0x173
 [<0040401b>] l4x_user_dispatcher+0x8e2/0x184c
 [<0040c030>] _upage_start+0x30/0x890
 [<00456e0e>] sys_select+0x0/0x173
 [<0044fd40>] do_execve+0x172/0x17b
 [<0044fd40>] do_execve+0x172/0x17b
 [<005c4372>] kernel_init+0x0/0x254
 [<004079a3>] l4_kernelinternal_execve+0xc2/0xc9
 [<00400915>] in_kernel_int80_helper+0x9/0x17
 [<005c4372>] kernel_init+0x0/0x254
 [<004094a3>] kernel_execve+0x17/0x1a
 [<00400198>] run_init_process+0x20/0x24
 [<00400242>] init_post+0xa6/0xd0
 [<005c45bc>] kernel_init+0x24a/0x254
 [<0040f644>] finish_task_switch+0x1f/0x50
 [<005c4372>] kernel_init+0x0/0x254
 [<005c4372>] kernel_init+0x0/0x254
 [<004072cb>] kernel_thread_start+0x28/0x2d
 [<00406ed2>] sys_enosys+0x0/0x6
 =======================
Code: 00 00 89 04 d5 04 e0 5a 00 89 0c d5 00 e0 5a 00 8b b7 00 02 00 00 8d 87 e0
 01 00 00 bb 18 00 00 00 31 c9 89 ca 0f 00 d0 5b 5e 5f <c3> 90 90 57 56 83 ec 04
 8b 74 24 10 8b 7c 24 14 f6 46 0d 20 74
EIP: [<00405055>] l4x_switch_to+0xd0/0xd3 SS:ESP 0023:108139a0
---[ end trace 10d172b22dcd8354 ]---
Fixing recursive fault but reboot is needed!
------------------------------------------------------------------------------------------------------------------------

I thought I forgot to set an option into kernel. But this happens
sometimes on egrep, which, etc..
Any idea on the problem ?
Regards
Marc