Messages in this thread | | | From | Ray Lee <> | Date | Mon, 8 Jun 2009 09:29:34 -0700 | Subject | Re: Run-time PM idea (was: Re: [linux-pm] [RFC][PATCH 0/2] PM: Rearrange core suspend code) |
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On Mon, Jun 8, 2009 at 8:06 AM, Ingo Molnar<mingo@elte.hu> wrote: > > * Matthew Garrett <mjg59@srcf.ucam.org> wrote:
>> I'd like the kernel to expose this functionality but leave the >> policy decisions to userland. > > The thing is, suspending something that is being used and relied on > by an app is a _bug_. This is rather fundamental: hardware state and > usage tracking is _NOT POLICY_.
Yes. But, actual example time: what about the case where completely turning off a laptop's DVD drive saves extra power, but then also turns off kernel and userspace notification of a disc being inserted?
One of the Other OS's handles this by having a popup when the battery gets low, asking if it's okay to turn the drive off. This is part of what Matthew is talking about here.
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