aacraid driver

I am using 2.6.4 on a dual opteron 246 box with 8GB ram and a Adaptec
2200S scsi raid card setup to use 6 scsi drives in a raid10 config. The
box is running Gentoo AMD64 with 64bit kernel/applications. 

I keep getting the following panic, sometimes happens during boot, and
at other times up to half an hour after the bootup.

Unable to handle kernel paging request at 00000000101f007c RIP:
<ffffffff802c1cad>{aac_command_normal+109}PML4 1fd036067 PGD 1fd076067
PMD 0
Oops: 0002 [1] SMP
CPU 0
Pid: 0, comm: swapper Not tainted
RIP: 0010:[<ffffffff802c1cad>]
<ffffffff802c1cad>{aac_command_normal+109}
RSP: 0018:ffffffff80494448  EFLAGS: 00010002
RAX: 0000010000048018 RBX: 0000010000048000 RCX: 0000000000000008
RDX: 00000000101f007c RSI: 00000100101f0000 RDI: 00000100f7e1d2e8
RBP: 00000100f7e1d2e8 R08: ffffffff80498000 R09: ffffffff805054a0
R10: 0000000000000000 R11: 0000000000000000 R12: 00000100101f0000
R13: 00000100101f007c R14: 0000000000000000 R15: 0000000000000000
FS:  0000002a95bcf060(0000) GS:ffffffff804901c0(0000)
knlGS:0000000000000000
CS:  0010 DS: 0018 ES: 0018 CR0: 000000008005003b
CR2: 00000000101f007c CR3: 0000000000101000 CR4: 00000000000006e0
Process swapper (pid: 0, stackpage=ffffffff803d83a0)
Stack: 0000010000049080 0000000000000086 00000101ffff1000
0000000000000006
       ffffffff80494488 ffffffff8012eece 00000100100048c0
000001001007d120
       ffffffff804944c8 0000000000000082
Call Trace:<IRQ> <ffffffff8012eece>{recalc_task_prio+430}
<ffffffff8013daec>{update_wall_time+12}
       <ffffffff802c1e21>{aac_rx_intr+97}
<ffffffff8011190f>{handle_IRQ_event+47}
       <ffffffff80111b61>{do_IRQ+193} <ffffffff8010cc60>{default_idle+0}
       <ffffffff8010f1fd>{ret_from_intr+0}  <EOI>
<ffffffff80131600>{thread_return+0}
       <ffffffff8010cc84>{default_idle+36}
<ffffffff8010cd0a>{cpu_idle+26}
       <ffffffff8049d84d>{start_kernel+397}
                                                                                                                       
Code: 89 02 31 d2 e8 2a f7 ff ff ba 01 00 00 00 be 01 00 00 00 49
RIP <ffffffff802c1cad>{aac_command_normal+109} RSP <ffffffff80494448>
CR2: 00000000101f007c
 <0>Kernel panic: Aiee, killing interrupt handler!
In interrupt handler - not syncing
 <0>Rebooting in 2 seconds..


I also got the panic message:

Kernel panic: Attempted to kill the idle task!
In idle task - not syncing

earlier today, but I think that is a BIOS bug that can be fixed with the
kernel option 'idle=poll'

Also, I don't have any swap space setup on the box - should I just
disable swap in the kernel so swapper isn't running? Will this actually
stop the panic, or just cause another process to die?

Thanks,
  Aman Gupta

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