boot hangs near ata

[Lars Eggert]

Hi,

Lars Eggert wrote:
> for the last few days, -current kernels have been hanging when the ata 
> devices are probed. Below is the relevant dmesg snippet (copied by hand, 
> because I currently have no way to hook up a serial console):

sorry for replying to myself, but I thought I'd add another data point. 
With ATAPI DMA disabled (I've had this enabled for ages), I get a 
slightly different error messages followed by a kernel panic:

acpi_cpu: throtteling enabled, 8 steps (100% to 12.5%), currently 100%
ad0: 190782MB <WDC WD2000JB-32EVA0> [387621/16/63] at ata0-master UDMA100
acd0: WARNING - MODE_SENSE_BIG read overrun 34>18
acd0: FAILURE - MODE_SENSE_BIG HARDWARE ERROR asc=0xf1 ascq=0x63 error=0
acd0: FAILURE - MODE_SENSE_BIG HARDWARE ERROR asc=0x00 ascq=0x00 error=0
acd0: WARNING - MODE_SENSE_BIG read overrun 34>18
acd0: FAILURE - MODE_SENSE_BIG HARDWARE ERROR asc=0xf1 ascq=0x63 error=0
acd0: CDROM <PIONEER DVD-RW DVR-106D> at ata0-slave PIO4
acd0: timeout waiting for ATAPI ready
acd0: unknown transfer phase
acd0: timeout waiting for ATAPI ready

Fatal trap 12: page fault while in kernel mode

The panic is in camisr():

camisr
ithread_loop
fork_exit
fork_trampoline

Hope this means something to someone.

(A second reboot just after the panic did not cause another panic, but 
resulted again in a hang.)

Lars
-- 
Lars Eggert                                     NEC Network Laboratories
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