Hello all: I'm running SLES 8 (kernel 2.4.19-64GB-SMP) on a Dell 6650 with 4GB of RAM. I have a Quantum M1500 tape library connected to the on-board Adaptec AIC7892 Ultra160 SCSI controller in the system. We are running the AIC7XXXX driver, which according to dmesg, is Rev 6.2.29. I can generate a kernel panic at will by turning this device off or on. This concerns me a bit, because any mistake can crash my system! :-/ Here is the kernel panic I've received, extracted from /var/log/messages: Aug 7 09:57:33 earth kernel: Unable to handle kernel NULL pointer dereference at virtual address 00000000 Aug 7 09:57:33 earth kernel: printing eip: Aug 7 09:57:33 earth kernel: 00000000 Aug 7 09:57:33 earth kernel: *pde = 1c852001 Aug 7 09:57:33 earth kernel: Oops: 0000 2.4.19-64GB-SMP #1 SMP Tue May 20 08:20:31 UTC 2003 Aug 7 09:57:33 earth kernel: CPU: 1 Aug 7 09:57:33 earth kernel: EIP: 0010:[<00000000>] Not tainted Aug 7 09:57:33 earth kernel: EFLAGS: 00010286 Aug 7 09:57:33 earth kernel: eax: c48f8ac0 ebx: c037b5c0 ecx: 00000000 edx: f247de60 Aug 7 09:57:33 earth kernel: esi: 650aa8c0 edi: f247de70 ebp: 660aa8c0 esp: f247ddf4 Aug 7 09:57:33 earth kernel: ds: 0018 es: 0018 ss: 0018 Aug 7 09:57:33 earth kernel: Process swapper (pid: 0, stackpage=f247d000) Aug 7 09:57:33 earth kernel: Stack: c02b29bc c48f8ac0 f247de70 f247de60 660aa8c0 c4925360 ffffffea c4f20000 Aug 7 09:57:33 earth kernel: c027ff17 f247de70 f247de60 00000000 f247c000 10000001 a05abbc8 00000000 Aug 7 09:57:33 earth kernel: ec09d7a0 e91708dc c028711b cdb0a160 00000000 000007f6 00000000 0027db79 Aug 7 09:57:33 earth kernel: Call Trace: [fib_lookup+252/320] [ip_route_input_slow+343/2528] [ip_queue_xmit2+331/448] [ip_route_input+73/480] [arp_process+861/1872] Aug 7 09:57:33 earth kernel: Call Trace: [<c02b29bc>] [<c027ff17>] [<c028711b>] [<c02807e9>] [<c02a590d>] Aug 7 09:57:33 earth kernel: [netif_rx+155/304] [net_rx_action+542/880] [do_softirq+217/224] [do_IRQ+251/304] [default_idle+0/80] [call_do_IRQ+5/13] Aug 7 09:57:33 earth kernel: [<c026a23b>] [<c026a75e>] [<c012d589>] [<c010b66b>] [<c0107110>] [<c010e2e8>] Aug 7 09:57:33 earth kernel: [default_idle+0/80] [default_idle+44/80] [cpu_idle+50/80] [vprintk+341/400] Aug 7 09:57:33 earth kernel: [<c0107110>] [<c010713c>] [<c01071b2>] [<c01280d5>] Aug 7 09:57:33 earth kernel: Code: Bad EIP value. Aug 7 09:57:33 earth kernel: <0>Kernel panic: Aiee, killing interrupt handler! Aug 7 09:57:33 earth kernel: In interrupt handler - not syncing Aug 7 09:57:40 earth kernel: Aug 7 09:57:40 earth kernel: wait_on_irq, CPU 2: Aug 7 09:57:40 earth kernel: irq: 0 [ 0 0 0 0 ] Aug 7 09:57:40 earth kernel: bh: 1 [ 1 1 0 0 ] Aug 7 09:57:40 earth kernel: Stack dumps: Aug 7 09:57:40 earth kernel: CPU 0: <unknown> Aug 7 09:57:40 earth kernel: CPU 1:00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Aug 7 09:57:40 earth kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Aug 7 09:57:40 earth kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 f247e70c Aug 7 09:57:40 earth kernel: Call Trace: Aug 7 09:57:40 earth kernel: Aug 7 09:57:40 earth kernel: CPU 3:00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Aug 7 09:57:41 earth kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Aug 7 09:57:41 earth kernel: 00000000 00000000 00000000 00000000 00000000 00000000 00000000 00000000 Aug 7 09:57:41 earth kernel: Call Trace: Aug 7 09:57:41 earth kernel: Aug 7 09:57:41 earth kernel: CPU 2:f2475f18 00000002 00000002 ffffffff 00000002 c010c0b8 c02f22c2 00000002 Aug 7 09:57:41 earth kernel: c3a8d000 c010b252 00000002 f2475f78 c01e73e1 c3a8d000 dae46ee0 00000000 Aug 7 09:57:41 earth kernel: f2474000 c3a8d368 f2475f78 f2475f78 00000000 f2474000 c012da0a c3a8d000 Aug 7 09:57:41 earth kernel: Call Trace: [wait_on_irq+248/267] [__global_cli+98/112] [flush_to_ldisc+177/320] [__run_task_queue+106/128] [context_thread+359/512] Aug 7 09:57:41 earth kernel: Call Trace: [<c010c0b8>] [<c010b252>] [<c01e73e1>] [<c012da0a>] [<c0137be7>] Aug 7 09:57:41 earth kernel: [rest_init+0/96] [rest_init+0/96] [arch_kernel_thread+46/64] [context_thread+0/512] Aug 7 09:57:41 earth kernel: [<c0105000>] [<c0105000>] [<c01075de>] [<c0137a80>] Aug 7 09:57:41 earth kernel: I also have an old HP 88780B 9-Track tape drive connected to a Adaptec 2944UW controller, using the same driver. I believe that I can cause the same panic by turning that device on and off as well, although I haven't proven it. I kind of hate to keep crashing my running system. :-/ This leads me to believe that there is a problem in the AIC7XXX driver. Does anyone know what to do about this? TIA Eric Raskin ---------------------------------------------------------------------------- -------------- Eric H. Raskin Voice: 914-741-1100 Professional Advertising Systems Inc. Fax: 914-741-2788 70 Memorial Plaza eraskin@paslists.com Pleasantville, NY 10570