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SubjectRe: Bad news

> [ Umm, I guess I should have explicitly stated that you should also run
> the copied-down oops through ksymoops with the proper System.map file
> for the kernel that oops'es - it's rather hard for me to see what is
> actually going on otherwise ]

Ok ... if tested 2.0.20 and 2.0.21 on my i486 at home ... and used
ksymoops to extract more information out of the oops. With 2.0.21
there is no oops but a deadlock near the same place where 2.0.20
makes oops. It _seems_ there is a bug within the scsi interface.

Werner

==============================================================================
2.0.20 Oops
------------------------------------------------------------------------------
Unable to handle kernel NULL pointer dereference at vrituall address c0000001
current->txx.cr3=00101000, %cr3=00101000
*pde=00102067
*pte=00000027
Oops: 0000
CPU: 0
EIP: 0010:[<0018d912>]
EFLAGS: 00010202
eax: 00000001 ebx: 00000000 ecx: 00092f60 edx: 00092f64
esi: 00000000 edi: 00095808 ebp: 00000000 esp: 00092f24
ds: 0018 es: 0018 fs: 002b gs: 0018 ss:0018
Process swapper (pid: 1, process nr: 1 stackpage=00092000)
Stack: 00000000 00000000 00000000 00009000 00092f60 00000000 00092f6e 00000008
0000017d 00092f6c 00000000 0008e000 00001000 00000246 00000000 00000002
00000000 00092f64 00000000 00000000 00090000 0018e2ca 00000000 001bea80
Call Trace: [<0018e2ca>] [<001899b3>] [<00168e81>] [<0012dd68>] [<0010a5b2>] [<0011e4d0>] [<001093aa>]
[<001091b4>] [<001091bb>] [<00109360>]
Code ff 08 88 d6 e5 00 00 8b b7 f0 00 00 00 43 85 f6 0f 84 54
------------------------------------------------------------------------------
home/werner> ksymoops /System.new < oops
Using `/System.new' to map addresses to symbols.
>>EIP: 18d912 <sd_init_onedisk+112/840>
Trace: 18e2ca <sd_finish+8a/e0>
Trace: 1899b3 <scsi_dev_init+193/1b0>
Trace: 168e81 <device_setup+31/40>
Trace: 12dd68 <sys_setup+18/50>
Trace: 10a5b2 <system_call+52/80>
Trace: 11e4d0 <kswapd>
Trace: 1093aa <init+4a/260>
Trace: 1091b4 <start_kernel+184/1b0>
Trace: 1091bb <start_kernel+18b/1b0>
Trace: 1093aa <init+4a/260>

==============================================================================
2.0.21 deadlock
------------------------------------------------------------------------------
Started kswapd v 1.4.2.2
scsi-ncr53c7,8xx : at PCI bus 0, device 1, function 0
scsi-ncr53c7,8xx : NCR53c810 at memory 0xfbfef000, io 0xe800, irq 9
scsi0 : burst length 8
scsi0 : NCR code relocated to 0x8600 (virt 0x00008600)
scsi0 : test 1 started
scsi0 : NCR53c{7,8}xx (rel 17)
scsi : 1 host.
scsi0 : target 0 accepting period 100ns offset 8 10.00MHz FAST SCSI-II
scsi0 : setting target 0 to period 100ns offset 8 10.00MHz FAST SCSI-II
Vendor: IBM OEM Model: 0662S12 Rev: 1011
Type: Direct-Access ANSI SCSI revision: 02
Detected scsi disk sda at scsi0, channel 0, id 0, lun 0
scsi0 : target 2 accepting period 204ns offset 8 4.90MHz synchronous SCSI
scsi0 : setting target 2 to period 224ns offset 8 4.46MHz synchronous SCSI
Vendor: TOSHIBA Model: CD-ROM XM-3701TA Rev: 0236
Type: CD-ROM ANSI SCSI revision: 02
Detected scsi CD-ROM sr0 at scsi0, channel 0, id 2, lun 0
scsi : detected 1 SCSI cdrom 1 SCSI disk total.
< nothing goes ... deadlock >
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