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Subject: Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA
 interrupts
To: Bjorn Helgaas <helgaas@kernel.org>
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Cc: linux-acpi@vger.kernel.org, rjw@rjwysocki.net, bhelgaas@google.com,
 ravikanth.nalla@hpe.com, linux@rainbow-software.org, timur@codeaurora.org,
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From: Sinan Kaya <okaya@codeaurora.org>
Message-ID: <cf80d0a4-c59d-23ff-081a-cf66feea3563@codeaurora.org>
Date: Thu, 20 Oct 2016 20:01:51 -0700
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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.