DragonFly kernel List (threaded) for 2011-05
Re: git: powerd: Wait hw.acpi.cpu.px_dom* sysctl to be created by kernel
On Mon, May 16, 2011 at 5:54 AM, Thomas Nikolajsen
>>Author: Sepherosa Ziehau <firstname.lastname@example.org>
>>Date: Sun Apr 17 15:00:54 2011 +0800
>> powerd: Wait hw.acpi.cpu.px_dom* sysctl to be created by kernel
>> Since hw.acpi.cpu.px_dom* creation is queued into ACPI taskqueue
>> and ACPI taskqueue is shared across various ACPI modules, any delay
>> in other modules may cause hw.acpi.cpu.px_dom* to be created at
>> quite a later time (e.g. cmbat module's task could take quite a lot
>> of time).
> A timeout would be nice, for now powerd(8) will wait indefinite
> if hw.acpi.cpu.px_dom* isn't created on system.
> How long timeout is reasonable? Maybe 5 minutes; or 1 minute; or ..?
Hmm, I think powerd will daemonize itself before endless waiting, so
it should not choke the booting process at least. Well, as about the
timeout, I didn't measure; it mainly depends on how much time the
tasks before pstate consumed (e.g. battery detection failure could
take quite some time).
Tomorrow Will Never Die