Re: [RFC, PATCH] sysdev suspend/resume order?

[Nathan Bryant <nbryant-p32f3XyCuykqcZcGjlUOXw@public.gmane.org>]

Pallipadi, Venkatesh wrote:

> I think the basic resume ordering should be 
> - APIC (if enabled)

You mean Local APIC?

> - IOAPIC (or PIC)

We still use the i8259 in APIC mode for some things. (Some motherboards 
  don't connect certain IOAPIC pins, like IRQ0... I think there may be 
other uses) Does that need to be before or after the local apic? Before 
or after the IO-APIC?

> - Link device
> - All drivers

Makes sense

But where does PIT fit into the order? It has its own sys_device, and 
was, I think, specifically reported by one user to be causing a problem. 
If the following message in the archives is accurate, it might help, but 
it's a little short on details of how he tracked this down: 
http://marc.theaimsgroup.com/?l=acpi4linux&m=109180681500139&w=2

Matthew, care to weigh in? I'm fuzzy on the details of what patches 
broke what, on your system. (That is to say, who did what to who.)

> 
> I somehow feel doing it in a single driver may increase the complexity
> of this whole thing. Especially with various APIC/IOAPIC configs and 
> boot time parameters.

You may be right. Part of the problem is that some of the affected code 
lives in arch/... and some of it lives in drivers/acpi/... That 
certainly makes cleaning up require a little more forethought.

Nathan

> 
> Thanks,
> Venki
> 
> 



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