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andretti
Tux's lil' helper
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Joined: 25 Feb 2007
Posts: 90

PostPosted: Wed Nov 20, 2013 1:56 pm    Post subject: All PCI Interrupt Links are disabled? Reply with quote

I noticed these boot dmesg in 2 EFI enabled PCs. Should I be concerned that all PCI Interrupt Links are disabled?

Code:

[    0.168347] pci_bus 0000:00: on NUMA node 0
[    0.168401] acpi PNP0A08:00: Requesting ACPI _OSC control (0x1d)
[    0.168533] acpi PNP0A08:00: ACPI _OSC control (0x18) granted
[    0.168859] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.168893] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.168926] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.168958] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.168990] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.169021] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.169053] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.169086] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.169238] ACPI: Enabled 4 GPEs in block 00 to 3F
[    0.169243] acpi root: \_SB_.PCI0 notify handler is installed
[    0.169280] Found 1 acpi root devices


However, there seems to be interrupts in /proc/interrupts

Code:

           CPU0       CPU1       CPU2       CPU3       
  0:         75          0          0          0  IR-IO-APIC-edge      timer
  1:          3          0          0          0  IR-IO-APIC-edge      i8042
  8:          1          0          0          0  IR-IO-APIC-edge      rtc0
  9:          0          0          0          0  IR-IO-APIC-fasteoi   acpi
 12:          4          0          0          0  IR-IO-APIC-edge      i8042
 16:  186545226      65074      39718      40249  IR-IO-APIC-fasteoi   ehci_hcd:usb1, saa7164[0]
 18:          0          0          0          0  IR-IO-APIC-fasteoi   cx88[0], cx88[0]
 23:      13283        337          4        151  IR-IO-APIC-fasteoi   ehci_hcd:usb2
 40:          0          0          0          0  DMAR_MSI-edge      dmar0
 41:          0          0          0          0  DMAR_MSI-edge      dmar1
 43:      27069        260        320        153  IR-PCI-MSI-edge      i915
 44:     151200      21414      13312      12540  IR-PCI-MSI-edge      ahci
 45:    3602015     200246      94055      80706  IR-PCI-MSI-edge      eth0
 46:          0          0          0          0  IR-PCI-MSI-edge      xhci_hcd
 47:    2147955      14703       5505       4190  IR-PCI-MSI-edge      snd_hda_intel
NMI:          0          0          0          0   Non-maskable interrupts
LOC:  168580214   10066266    8701516   10395622   Local timer interrupts
SPU:          0          0          0          0   Spurious interrupts
PMI:          0          0          0          0   Performance monitoring interrupts
IWI:     153125     167233     176709     155275   IRQ work interrupts
RTR:          0          0          0          0   APIC ICR read retries
RES:    3693515    4928948    5254751    5094374   Rescheduling interrupts
CAL:        167       2138       2224       2234   Function call interrupts
TLB:      73770      70010      82837      87611   TLB shootdowns
TRM:          0          0          0          0   Thermal event interrupts
THR:          0          0          0          0   Threshold APIC interrupts
MCE:          0          0          0          0   Machine check exceptions
MCP:      15557      15557      15557      15557   Machine check polls
ERR:          0
MIS:          0


Anyone experienced similar situation as above?

Thanks
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aCOSwt
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Joined: 19 Oct 2007
Posts: 2384
Location: Hilbert space

PostPosted: Sat Nov 23, 2013 5:20 pm    Post subject: Re: All PCI Interrupt Links are disabled? Reply with quote

andretti wrote:
Anyone experienced similar situation as above?

Everybody I believe!
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andretti
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Joined: 25 Feb 2007
Posts: 90

PostPosted: Thu Nov 28, 2013 1:36 pm    Post subject: Reply with quote

This is interesting... Not all PCI Interrupt Links were disabled when the same PC was booted from EFI CSM BIOS.

Code:

[    0.759367] acpi PNP0A08:00: Requesting ACPI _OSC control (0x1d)
[    0.759819] acpi PNP0A08:00: ACPI _OSC control (0x1d) granted
[    0.760743] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 10 *11 12 14 15)
[    0.761331] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.762029] ACPI: PCI Interrupt Link [LNKC] (IRQs *3 4 5 6 10 11 12 14 15)
[    0.762593] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 4 5 6 *10 11 12 14 15)
[    0.763155] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.763852] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 5 6 10 11 12 14 15) *0, disabled.
[    0.764593] ACPI: PCI Interrupt Link [LNKG] (IRQs 3 4 *5 6 10 11 12 14 15)
[    0.765180] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 *4 5 6 10 11 12 14 15)
[    0.766309] ACPI: Enabled 3 GPEs in block 00 to 7F
[    0.766506] acpi root: \_SB_.PCI0 notify handler is installed
[    0.766576] Found 1 acpi root devices
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platojones
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Joined: 23 Oct 2002
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PostPosted: Thu Nov 28, 2013 7:16 pm    Post subject: Reply with quote

I don't have any disabled. Running 3.12.1-gentoo on ASUS RIVE, with UEFI bios:

Code:

[    0.289334] acpi PNP0A03:00: ACPI _OSC support notification failed, disabling PCIe ASPM
[    0.291055] ACPI: PCI Interrupt Link [LNKA] (IRQs 3 4 5 6 7 10 *11 12 14 15)
[    0.291092] ACPI: PCI Interrupt Link [LNKB] (IRQs 3 4 5 6 7 *10 11 12 14 15)
[    0.291126] ACPI: PCI Interrupt Link [LNKC] (IRQs 3 4 5 6 11 12 14 *15)
[    0.291160] ACPI: PCI Interrupt Link [LNKD] (IRQs 3 *4 5 6 10 11 12 14 15)
[    0.291195] ACPI: PCI Interrupt Link [LNKE] (IRQs 3 4 5 6 7 10 11 12 *14 15)
[    0.291229] ACPI: PCI Interrupt Link [LNKF] (IRQs 3 4 *5 6 7 10 11 12 14 15)
[    0.291263] ACPI: PCI Interrupt Link [LNKG] (IRQs *3 4 5 6 7 10 11 12 14 15)
[    0.291297] ACPI: PCI Interrupt Link [LNKH] (IRQs 3 4 5 6 *7 10 11 12 14 15)
[    0.291458] ACPI: Enabled 3 GPEs in block 00 to 3F
[    0.291458] ACPI: \_SB_.PCI0: notify handler is installed
[    0.291458] ACPI: \_SB_.UNC0: notify handler is installed
[    0.292023] PCI: Using ACPI for IRQ routing


Of course, I have no idea what it means if they are disabled either.
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