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

From Bjorn Helgaas <helgaas@kernel.org>
Newsgroups linux.kernel
Subject Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts
Date 2016-10-21 04:50 +0200
Message-ID <suy4a-7Wf-35@gated-at.bofh.it> (permalink)
References (2 earlier) <stD5T-2pf-9@gated-at.bofh.it> <stEuZ-3xx-21@gated-at.bofh.it> <stEEG-3BE-41@gated-at.bofh.it> <su7Ql-7ys-15@gated-at.bofh.it> <surP3-3PX-17@gated-at.bofh.it>
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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.

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Thread

[PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-15 06:50 +0200
  Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts "Rafael J. Wysocki" <rafael@kernel.org> - 2016-10-15 14:50 +0200
    Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-15 19:00 +0200
  Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Bjorn Helgaas <helgaas@kernel.org> - 2016-10-18 16:00 +0200
    Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-18 17:30 +0200
      Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-18 17:40 +0200
        Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Bjorn Helgaas <helgaas@kernel.org> - 2016-10-20 00:50 +0200
          Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts "Rafael J. Wysocki" <rafael@kernel.org> - 2016-10-20 01:20 +0200
            Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Bjorn Helgaas <helgaas@kernel.org> - 2016-10-21 03:10 +0200
          Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-20 22:10 +0200
            Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA interrupts "Rafael J. Wysocki" <rafael@kernel.org> - 2016-10-20 23:10 +0200
              Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-20 23:30 +0200
            Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Bjorn Helgaas <helgaas@kernel.org> - 2016-10-21 04:50 +0200
              Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-21 05:10 +0200
    Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-20 00:30 +0200
  Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Bjorn Helgaas <helgaas@kernel.org> - 2016-10-23 02:00 +0200
    Re: [PATCH V3 1/3] ACPI, PCI IRQ: add PCI_USING penalty for ISA  interrupts Sinan Kaya <okaya@codeaurora.org> - 2016-10-24 06:20 +0200

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