Messages in this thread | | | From | Nigel Cunningham <> | Subject | Re: Hotplug events for system suspend/resume | Date | Wed, 12 May 2004 13:59:50 +1000 |
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Hi.
On Wed, 12 May 2004 12:44, Todd Poynor wrote: > The patch hooks into the power subsystem prior to freezing processes and > after unfreezing processes, so I don't think it's a concern (unless > something is using the power subsystem rather oddly). This patch sends > a single notification of system suspend and a single notification of > system resume, in case there's any confusion with the individual device > state change notifiers also recently discussed. It's been run > successfully on one ACPI system and one non-ACPI system.
Great.
> > In my mind, this approach is simpler and makes more sense: userspace > > should worry about userspace actions related to suspending before calling > > kernelspace. Kernel space should then only worry about saving and > > restoring driver states and should be transparent to user space. ... > > Agreed, with the minor reservations listed in a previous email (suspend > initiated by drivers must coordinate ad-hoc with userspace, etc.).
You're thinking ACPI drivers initiating a suspend? They would do it through acpid, wouldn't they? At least that's the glue I use to get my sleep button to initiate a suspend. I would assume thermal events would/should work the same.
> I'll let anybody who cares more deeply about this speak up now, > otherwise this isn't a battle I'll be fighting on behalf of others any > more. Thanks -- Todd
:> I wasn't meaning to make it a battle!
Nigel
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