Re: [PATCH] libata: Add an additional LPM policy to match Intel recommendations

2015-04-13 Thread Tejun Heo
Hello, On Mon, Apr 13, 2015 at 10:52:59AM -0700, Matthew Garrett wrote: > Ok - my only real concern there was that we might end up changing the > semantics of medium_power enough that it would break somebody. I'll > post a patch to do that instead and I guess we can see what happens - > worst case

Re: [PATCH] libata: Add an additional LPM policy to match Intel recommendations

2015-04-13 Thread Matthew Garrett
On Mon, Apr 13, 2015 at 7:32 AM, Tejun Heo wrote: > On Fri, Apr 10, 2015 at 01:15:29PM -0700, Matthew Garrett wrote: >> Intel publish a document on designing energy efficient SATA devices at >> http://www.intel.com/content/dam/doc/reference-guide/sata-devices-implementation-recommendations.pdf >>

Re: [PATCH] libata: Add an additional LPM policy to match Intel recommendations

2015-04-13 Thread Tejun Heo
On Fri, Apr 10, 2015 at 01:15:29PM -0700, Matthew Garrett wrote: > Intel publish a document on designing energy efficient SATA devices at > http://www.intel.com/content/dam/doc/reference-guide/sata-devices-implementation-recommendations.pdf > which recommends that ALPE be set, ASPE be cleared and t