[lkml]   [2010]   [May]   [13]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
Messages in this thread
SubjectRe: [linux-pm] [PATCH 0/8] Suspend block api (version 6)
On Thu, 13 May 2010, Tony Lindgren wrote:

> > > And that's why
> > > it should be handled by runtime power management instead.
> >
> > Runtime PM is not capable of freezing userspace and shutting down CPUs.
> > More or less by definition -- if it could then it wouldn't be "runtime"
> > any more, since the processor wouldn't be running.
> Not true. We are already powering off CPUs and rebooting them for
> at least omaps in every idle loop using cpuidle. The memory stays on.

Okay, that's a valid point. But is that approach usable in general
(i.e., on non-OMAP systems)?

How do you handle situations where the CPU is currently idle but an
event (such as I/O completion) is expected to occur in the near future?
You don't want to power-off and reboot then, do you?

Alan Stern

 \ /
  Last update: 2010-05-14 00:03    [W:0.257 / U:21.288 seconds]
©2003-2018 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site