Re: [3/6] 2.6.21-rc2: known regressions

[Tejun Heo]

Mathieu BÃrard wrote:
> Jeff Garzik a Ãcrit :
>> Adrian Bunk wrote:
>>> Subject    : NCQ problem with ahci and Hitachi drive
>>> References : http://lkml.org/lkml/2007/3/4/178
>>> Submitter  : Mathieu BÃrard <Mathieu.Berard@xxxxxxxxx>
>>> Status     : unknown
>> according to the last message in that thread, it sounds like ACPI and
>> interrupt problems
>>
> Hi,
> after more testing with a 2.6.21-rc3, it appears that after several ata
> errors the boot process
> somehow continued as normal, after a "NCQ disabled due to excessive
> errors" message.
> "pci=noacpi" or "noacpi" parameters workarounds the problem "irqpoll"
> does nothing.

I was mistaken.  It can't be IRQ routing problem.  I somehow thought the
port was a ata_piix one.  Considering the reported broken NCQ feature on
the device GTF might be mangling with the drive to disable NCQ or
something.  Does giving "libata.noacpi=1" make any difference?

Thanks.

-- 
tejun
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