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Red Hat Enterprise Linux で SR-IOV を有効化できず、"not enough MMIO resources for SR-IOV" というメッセージが表示される

Solution In Progress - Updated -

Issue

  • max_vfs=4 で igb ドライバーをロードするときに、/var/log/dmesg に次のエラーメッセージが見つかりました

        kernel: Intel(R) Gigabit Ethernet Network Driver - version 2.1.0-k2
        kernel: Copyright (c) 2007-2009 Intel Corporation.
        kernel: igb 0000:01:00.0: PCI INT B -> GSI 17 (level, low) -> IRQ 17
        kernel: igb 0000:01:00.0: not enough MMIO resources for SR-IOV
    
  • i40e の別のエラー

        i40e 0000:01:00.0: not enough MMIO resources for SR-IOV
        i40e 0000:01:00.0: Failed to enable SR-IOV: -12
    
  • ice の別のエラー

        ice 0000:17:00.0: not enough MMIO resources for SR-IOV
        ice 0000:17:00.0: Failed to enable SR-IOV: -12
    
  • bnxt_en の別のエラー

        kernel: bnxt_en 0000:4b:00.0: not enough MMIO resources for SR-IOV
        kernel: bnxt_en 0000:4b:00.1: not enough MMIO resources for SR-IOV
        kernel: bnxt_en 0000:4b:00.1 eno12409np1: Requested VFs 8, can enable 1
        kernel: bnxt_en 0000:4b:00.1: not enough MMIO resources for SR-IOV
        kernel: bnxt_en 0000:4b:00.1: 8 VFs requested; only 1 enabled
        kernel: bnxt_en 0000:4b:00.1 eno12409np1: Cannot enable VF's as all resources are used by PF
    

Environment

  • Red Hat Enterprise Linux (すべてのバージョン)
  • SRIOV

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