Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts

Sinan Kaya
2016-10-21T03:01:54Z

On 10/20/2016 7:41 PM, Bjorn Helgaas wrote:
> On Thu, Oct 20, 2016 at 01:01:04PM -0700, Sinan Kaya wrote:
>> On 10/19/2016 3:44 PM, Bjorn Helgaas wrote:
>
>>> - Maintain a mapping of (IRQ, penalty). Initially all penalties are
>>> zero. This is for *all* IRQs, not just ISA ones. This could be a
>>> linked list, but the structure is not important as long as we can
>>> add things dynamically.
>>
>> Dynamic allocation doesn't work due to early calls from x86 architecture.
>> This is the reason why we iterate the link objects.
>
> Where exactly is this early penalization? That seems to be the
> biggest problem. Well, maybe the question of ACPI core parsing of
> _CRS/_PRS is a bigger structural problem, but the dynamic allocation
> thing at least seems solvable.
>

http://marc.info/?l=linux-acpi&m=145580159209240&w=2

--
Sinan Kaya
Qualcomm Datacenter Technologies, Inc. as an affiliate of Qualcomm Technologies, Inc.
Qualcomm Technologies, Inc. is a member of the Code Aurora Forum, a Linux Foundation Collaborative Project.