Hello again,
>With 2.6.10 + pdc20269, there is a known problem on ATAPI DMA.
>Please use 2.6.11 to test ATAPI.
Easier said than done. Using 2.6.11-rc4-bk9, I get an oops
(see below) with any drives attached. This occurs whether I
use one or four controllers.
How might I get to working around this? I'll try the next
snapshot that includes the latest round of libata fixes to
see if it helps.
Thanks again,
Drew
SCSI device sda: drive cache: write back
sda:<1>Unable to handle kernel NULL pointer dereference at virtual address
00000000
printing eip:
00000000
*pde=00000000
Oops: 0000 [#1]
Modules linked in:
CPU: 0
EIP: 0060:[<00000000>] Not tainted VLI
EFLAGS: 00010093 (2.6.11-rc4-bk9)
EIP is at 0x0 c13071bc
eax: c044c1c0 ebx: c13071bc ecx: c13bd880 edx: 00000032
esi: 00000000 edi: c1307688 ebp: c13928e0 esp: c04b7f90
ds: 007b es: 0007b ss:0068
Process swapper (pid: 0, threadinfo=c04b7000 task=c03dbb20)
Stack: c02c54f6 c13071bc c0484fa0 c0484fa0 00000282 00000000 c13bd880 00000000
c0484fa0 0000000b c012be20 0000000b c13928e0 c0484fa0 00000000 0000000b
c0483cc0 c13bd880 c0484fa0 c012bf0b 0000000b c0483a00 00000001 c0484f90
Call Trace:
[<c02c54f6>] ata_interrupt+0x76/0x110
[<c012be20>] handle_IRQ_event+0x30/0x70
[<c012bf0b>] __do_IRQ_event+0xab/0x120
[<c0104162>] do_IRQ+0x42/0x70
========================
[<c0100570>] default_idle+0x0/0x30
[<c010283e>] common_interrupt+0x1a/0x20
[<c0100570>] default_idle+0x0/0x30
[<c0100594>] default_idle+0x24/0x30
[<c010062c>] cpu_idle+0x4c/0x60
[<c048575c>] start_kernel+0x13c/0x160
[<c0485330>] unknown_bootoption+0x0/0x1e0
Code: Bad EIP value.
<0>Kernel panic - not syncing: Fatal exception in interrupt
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