ACK: [Precise][PATCH 1/1] UBUNTU: SAUCE: pci: Rework ASPM disable code

Colin Ian King colin.king at canonical.com
Tue Dec 6 09:51:53 UTC 2011


On 06/12/11 07:17, Stefan Bader wrote:
> On 05.12.2011 22:16, Tim Gardner wrote:
>> Appears to have good test results. Certainly better then the last time ASPM was
>> enabled by default.
>>
>> rtg
> Did we have ASPM enabled by default? Or was that ALPM?
>
> -Stefan
>
I was under the impression it was Aggressive Link Power Management 
(ALPM) that was causing some users
grief. ALPM is where the SATA AHCI controller puts the SATA link to the 
disk into a very low power mode when there's no IO for awhile, if this 
mechanism is broken I suspect users may see their data being eaten.

Colin




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