Re: Problems with SATA/AHCI with 'nosmp' boot option

[Reuben Farrelly <reuben-lkml@reub.net>]

Hi,

On 4/10/2005 11:31 p.m., Jeff Garzik wrote:
> Reuben Farrelly wrote:
>> Hi,
>>
>> While trying to gather more info about a problem with the latest 
>> sky2.c Gig ethernet driver hanging, I thought I'd boot my SMP built 
>> kernel (on an SMP/HT machine) with the 'nosmp' boot option.
>>
>> However when I did this, I could no longer boot the machine, because 
>> the ahci
>> driver reported timeouts when probing the drives attached to the SATA 
>> ports, like this:
>>
>> Uniform Multi-Platform E-IDE driver Revision: 7.00alpha2
>> ide: Assuming 33MHz system bus speed for PIO modes; override with 
>> idebus=xx
>> ICH6: IDE controller at PCI slot 0000:00:1f.1
>> ACPI: PCI Interrupt 0000:00:1f.1[A] -> GSI 18 (level, low) -> IRQ 73
>> ICH6: chipset revision 3
>> ICH6: not 100% native mode: will probe irqs later
>>     ide0: BM-DMA at 0xffa0-0xffa7, BIOS settings: hda:pio, hdb:pio
>>     ide1: BM-DMA at 0xffa8-0xffaf, BIOS settings: hdc:pio, hdd:pio
>> ACPI: PCI Interrupt 0000:00:1f.2[B] -> GSI 19 (level, low) -> IRQ 81
>> ahci(0000:00:1f.2) AHCI 0001.0000 32 slots 4 ports 1.5 Gbps 0xf impl 
>> SATA mode
>> ahci(0000:00:1f.2) flags: 64bit ncq led slum part
>> ata1: SATA max UDMA/133 cmd 0xF8806D00 ctl 0x0 bmdma 0x0 irq 81
>> ata2: SATA max UDMA/133 cmd 0xF8806D80 ctl 0x0 bmdma 0x0 irq 81
>> ata3: SATA max UDMA/133 cmd 0xF8806E00 ctl 0x0 bmdma 0x0 irq 81
>> ata4: SATA max UDMA/133 cmd 0xF8806E80 ctl 0x0 bmdma 0x0 irq 81
>> ata1 is slow to respond, please be patient
>> ata1 failed to respond (30 secs)
>> scsi0 : ahci
>> ata2 is slow to respond, please be patient
>> ata2 failed to respond (30 secs)
> 
> Sounds like AHCI or MSI is broken.
> 
>     Jeff

I am still seeing this on 2.6.15-rc1-mm1.  I don't think we got any further 
than to conclude it _might_ be AHCI or MSI.

What other information is required for me to be able to help someone look 
closer and/or resolve this bug?

I have information about my system up at http://www.reub.net/kernel/ including 
some system specifications and my .config.  (It's a lot easier to put it there 
than attaching to every email)

Thanks,
Reuben