Debug: sleeping function called from invalid context at include/linux/rwsem.h:43

Hi all,
Just found some debug messages like the subject above, from
the latest kernel compiled with debug options. Attached are the dmesg output and the .config file. Not sure if anyone has seen this.

Thanks.

Other relevant info
-------------------------

[root@feynman linux-2.5]# sh scripts/ver_linux
If some fields are empty or look unusual you may have an old version. Compare to the current minimal requirements in Documentation/Changes.

Linux feynman 2.6.0-test1 #5 Tue Jul 22 11:37:12 SGT 2003 i686 i686 i386 GNU/Linux

Gnu C                  3.2
Gnu make               3.79.1
util-linux             2.11r
mount                  2.11r
e2fsprogs              1.27
jfsutils               1.0.17
reiserfsprogs          3.6.2
pcmcia-cs              3.1.31
quota-tools            3.06.
PPP                    2.4.1
isdn4k-utils           3.1pre4
nfs-utils              1.0.1
Linux C Library        2.2.93
Dynamic linker (ldd)   2.2.93
Procps                 2.0.7
Net-tools              1.60
Kbd                    1.06
Sh-utils               2.0.12
Modules Loaded         isofs ide_cd cdrom e100 uhci_hcd mousedev hid usbcore rtc ext3 jbd

[root@feynman linux-2.5]# cat /proc/cpuinfo
processor : 0
vendor_id : GenuineIntel
cpu family : 6
model : 8
model name : Pentium III (Coppermine)
stepping : 3
cpu MHz : 187.200
cache size : 256 KB
fdiv_bug : no
hlt_bug : no
f00f_bug : no
coma_bug : no
fpu : yes
fpu_exception : yes
cpuid level : 2
wp : yes
flags : fpu vme de tsc msr pae mce cx8 sep mtrr pge mca cmov pat pse36 mmx fxsr sse
bogomips : 851.96

[root@feynman linux-2.5]# cat /proc/modules
isofs 22980 0 - Live 0xd890b000
ide_cd 38432 0 - Live 0xd88df000
cdrom 33248 1 ide_cd, Live 0xd88ea000
e100 76324 0 - Live 0xd88f7000
uhci_hcd 40904 0 - Live 0xd88d4000
mousedev 7404 2 - Live 0xd8814000
hid 25664 0 - Live 0xd881f000
usbcore 119700 4 uhci_hcd,hid, Live 0xd8840000
rtc 19064 0 - Live 0xd8819000
ext3 109192 4 - Live 0xd8860000
jbd 81304 1 ext3, Live 0xd882b000

[root@feynman linux-2.5]# cat /proc/ioports
0000-001f : dma1
0020-0021 : pic1
0040-005f : timer
0060-006f : keyboard
0070-0077 : rtc
0080-008f : dma page reg
00a0-00a1 : pic2
00c0-00df : dma2
00f0-00ff : fpu
0170-0177 : ide1
01f0-01f7 : ide0
0376-0376 : ide1
03bc-03be : parport0
03c0-03df : vga+
03f6-03f6 : ide0
0cf8-0cff : PCI conf1
1000-103f : Intel Corp. 82371AB/EB/MB PIIX4
1040-105f : Intel Corp. 82371AB/EB/MB PIIX4
1800-183f : Intel Corp. 82557/8/9 [Ethernet
1800-183f : e100
1840-1847 : Xircom Mini-PCI V.90 56k Mo
1850-185f : Intel Corp. 82371AB/EB/MB PIIX4
1860-187f : Intel Corp. 82371AB/EB/MB PIIX4
1860-187f : uhci-hcd

[root@feynman linux-2.5]# cat /proc/iomem 00000000-0009f7ff : System RAM 0009f800-0009ffff : reserved 000a0000-000bffff : Video RAM area 000cc000-000cd7ff : Extension ROM 000e0000-000effff : Extension ROM 000f0000-000fffff : System ROM 00100000-17feffff : System RAM
00100000-0031c36f : Kernel code 0031c370-003db53f : Kernel data
17ff0000-17ffebff : ACPI Tables 17ffec00-17ffffff : ACPI Non-volatile Storage 50000000-50000fff : Texas Instruments PCI1450 50100000-50100fff : Texas Instruments PCI1450 (#2) e8000000-e80fffff : Cirrus Logic CS 4614/22/24 [Cryst e8100000-e811ffff : Intel Corp. 82557/8/9 [Ethernet
e8100000-e811ffff : e100
e8120000-e8120fff : Intel Corp. 82557/8/9 [Ethernet
e8120000-e8120fff : e100
e8121000-e8121fff : Xircom Mini-PCI V.90 56k Mo e8122000-e8122fff : Cirrus Logic CS 4614/22/24 [Cryst f0000000-f7ffffff : PCI Bus #01
f0000000-f7ffffff : S3 Inc. 86C270-294 Savage/IX
f8000000-fbffffff : Intel Corp. 440BX/ZX/DX - 82443B fff80000-ffffffff : reserved

Probably some initcall has more spin_lock()s than spin_unlock()s and the init process's preempt count ended up permanently out of whack.

Please boot with "initcall_debug=1" on the boot command line and if you see a line of the form:

error in initcall at 0xXXXXXXXX: returned with preemption imbalance

then please look up 0xXXXXXXXX in System.map and let us know.