On Sat, 2007-07-07 at 12:17 -0400, Alan Stern wrote:
> On Sat, 7 Jul 2007, Benjamin Herrenschmidt wrote:
>
> > > > And guess what ? It's what we do on powerbooks, and it works fine,
> > > > without a freezer :-)
>
> > If you remember, one of the things I've been advocating has always been
> > that we should put on hold all plug activity (unplug might be alright as
> > long as the user events are just delayed) when we start suspending. No
> > new devices, no new bindings. "hub" type devices are respondible for
> > bringing in the new stuff after resume.
>
> Which is exactly my point. It _doesn't_ work fine without a freezer,
> because the USB stack currently relies on the freezer to prevent plug
> activity.
Putting on hold plug activity has nothing, NOTHING, to do with the half
assed piece of deadlocking crap we have now we call a freezer.
As long as you guys keep mixing up all the issues and coming up with
totally bogus solutions that cannot work, we won't have a useful suspend
(either to RAM or to disk) in linux.
Ben.
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