Re: [PATCH] ACPI: add "auto" to acpi_enforce_resources

Matthew Garrett
2009-02-04T06:05:24Z

On Wed, Feb 04, 2009 at 12:52:06AM -0500, Len Brown wrote:

> While it is slightly off-topic of the (I agree, real)
> technical issue here, note that polling is not "normal" on ACPI systems.
> [1] was on SuSE Linux 10.0, which on their own decided to
> over-ride the kernel and enable thermal zone polling by default.

Checking the DSDTs I have to hand, it seems that polling is expected on
about 5% of systems via an explicit _TZP and on almost all machines via
_TSP. Even on systems where thermal notifications are provided, it's
still up to the OS to poll the zone to find the current temperature and
take appropriate action. There's still a window for native smbus drivers
to screw everything up.

--
Matthew Garrett | mjg59@srcf.ucam.org