Pavel Machek wrote:
Hi!
This is a patch (very ugly, assumes you have just one disk) to bring
powersaving to AHCI. You need Alan's SCSI autosuspend (attached) patch
as a base.
It saves .5W compared to config with disk spinning, and even .15W
compared to hdparm -y... on my thinkpad x60 anyway.
..
There was a discussion of this here today.
It makes good use of AHCI-specific features.
Has it been tested with a Port-Multiplier yet?
This is cool enough that we really ought to do a hardware-independent
version, so that all SATA interfaces could benefit. Especially ata_piix,
but others too.
Cheers
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