[Bug 228646] 11.2-BETA3 fails boot on Epyc 7501 dual socket with intel X710

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=228646

            Bug ID: 228646
           Summary: 11.2-BETA3 fails boot on Epyc 7501 dual socket with
                    intel X710
           Product: Base System
           Version: 11.1-STABLE
          Hardware: amd64
                OS: Any
            Status: New
          Severity: Affects Only Me
          Priority: ---
         Component: kern
          Assignee: bugs at FreeBSD.org
          Reporter: phk at FreeBSD.org

This is the part of the panic I can still see on the console:

    ixl0: <Intel(R) Ethernet Connection 700 Series PF Driver, Version -
1.9.9-k> mem 0xef000000-0xefffffff,0xf0018000-0xf001ffff at device 0.0
numa-domain 0 on pci1
    ixl0: using 1024 tx descriptors and 1024 rx descriptors
    ixl0: fw 6.80.48603 api 1.7 nvm 6.00 etid 800034eb oem 18.4608.6
    ixl0: PF-ID[0]: VFs 32, MSIX 129, VF MSIX 5, QPs 384, I2C
    ixl0: attempting to allocate 9 MSI-X vectors (129 supported)
    panic: nexus_add_irq: failed
    cpuid = 2
    KDB: stack backtrace:
    #0 0xffffffff80b3d407 at kdb_backtrace+0x67
    #1 0xffffffff80af6a77 at vpanic+0x177
    #2 0xffffffff80af68f3 at panic+0x43
    #3 0xffffffff810f31b4 at nexus_add_irq+0x34
    #4 0xffffffff810f2ad5 at msix_alloc+0x35
    #5 0xffffffff80768138 at pci_alloc_msix_method+0x328
    #6 0xffffffff810000eb at ixl_init_msix+0x2fb
    #7 0xffffffff80ffa71d at ixl_attach+0x3bd
    #8 0xffffffff80b2fb38 at device_attach+0x3b8
    #9 0xffffffff80b30ddd at bus_generic_attach+0x3d
    #10 0xffffffff807736d5 at pci_attach+0xd5
    #11 0xffffffff80b2fb38 at device_attach+0x3b8
    #12 0xffffffff80b30ddd at bus_generic_attach+0x3d
    #13 0xffffffff803cee21 at acpi_pcib_pci_attach+0xa1
    #14 0xffffffff80b2fb38 at device_attach+0x3b8
    #15 0xffffffff80b30ddd at bus_generic_attach+0x3d
    #16 0xffffffff807736d5 at pci_attach+0xd5
    #17 0xffffffff80b2fb38 at device_attach+0x3b8

Not sure if this is related to the Intel X710 4x10GBE or the system as such.

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