Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off

From	Sinan Kaya <okaya@codeaurora.org>
Newsgroups	linux.kernel
Subject	Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off
Date	2016-09-30 23:20 +0200
Message-ID	<sndnP-7le-1@gated-at.bofh.it> (permalink)
References	(3 earlier) <sn8oe-3Ev-15@gated-at.bofh.it> <snbP3-6b5-13@gated-at.bofh.it> <snbP3-6b5-19@gated-at.bofh.it> <sncBs-6LW-7@gated-at.bofh.it> <snde9-7hu-5@gated-at.bofh.it>
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On 9/30/2016 5:04 PM, Rafael J. Wysocki wrote:
>> >
>> > I hope it makes sense now. I tend to skip details sometimes. Feel free to
>> > send more questions.
> Thanks for the information!
> 
> IIUC, basically, what you are proposing would be to restore the old
> penalizing method for IRQs in the 0-255 range and use the new approach
> for the rest, right?

Correct. 

> 
> What's the drawback, if any?

I don't see any drawback to be honest. The reason why I got rid of these ISA
API functions was to remove some of the x86ism from ACPI code. This was Bjorn's
request to clean it up and we failed in two places so far. 

1. acpi_irq_penalty_init
2. acpi_penalize_sci_irq

and we ended up reverting both of these changes. The reverts are all because of the
fact that these APIs are called asynchronously without any coordination with the
PCI Link object or the interrupt controller driver about when it is a good time to be
called.

During this debug, I learnt that acpi_penalize_isa_irq gets called before even ACPI
gets to initialize and relies on static IRQ array for keeping the penalties.

> 
> Thanks,
> Rafael
> 

-- 
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.

Thread

4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-09-25 15:20 +0200
  Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-09-26 14:20 +0200
    Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-09-27 23:10 +0200
      Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-09-27 23:30 +0200
        Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-09-28 00:30 +0200
          Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off "Rafael J. Wysocki" <rjw@rjwysocki.net> - 2016-09-28 01:00 +0200
            Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-28 01:10 +0200
              Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-28 16:20 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-28 20:30 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-29 01:40 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-09-29 11:20 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off okaya@codeaurora.org - 2016-09-29 15:10 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-09-29 15:50 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-29 16:30 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-29 16:40 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-29 19:20 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-09-29 20:10 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-30 00:50 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-09-30 08:50 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off okaya@codeaurora.org - 2016-09-30 15:20 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-09-30 18:00 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off "Rafael J. Wysocki" <rafael@kernel.org> - 2016-09-30 21:40 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-30 22:30 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off "Rafael J. Wysocki" <rafael@kernel.org> - 2016-09-30 23:10 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-30 23:20 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off "Rafael J. Wysocki" <rafael@kernel.org> - 2016-09-30 23:30 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-30 23:40 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-10-01 19:50 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-10-03 03:10 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-10-04 16:40 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link [LNKD]. Try pci=noacpi or acpi=off Ondrej Zary <linux@rainbow-software.org> - 2016-10-04 20:00 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-30 21:40 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Wim Osterholt <wim@djo.tudelft.nl> - 2016-09-29 16:20 +0200
                Re: 4.7 regression: ACPI: No IRQ available for PCI Interrupt Link  [LNKD]. Try pci=noacpi or acpi=off Sinan Kaya <okaya@codeaurora.org> - 2016-09-29 16:40 +0200

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