Messages in this thread Patch in this message | | | Subject | Re: [PATCH] PCI/LINK: Account for BW notification in vector calculation | From | Alex G <> | Date | Mon, 22 Apr 2019 19:05:57 -0500 |
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On 4/22/19 5:43 PM, Alex Williamson wrote: > [ 329.725607] vfio-pci 0000:07:00.0: 32.000 Gb/s available PCIe bandwidth, > limited by 2.5 GT/s x16 link at 0000:00:02.0 (capable of 64.000 Gb/s with 5 > GT/s x16 link) > [ 708.151488] vfio-pci 0000:07:00.0: 32.000 Gb/s available PCIe bandwidth, > limited by 2.5 GT/s x16 link at 0000:00:02.0 (capable of 64.000 Gb/s with 5 > GT/s x16 link) > [ 718.262959] vfio-pci 0000:07:00.0: 32.000 Gb/s available PCIe bandwidth, > limited by 2.5 GT/s x16 link at 0000:00:02.0 (capable of 64.000 Gb/s with 5 > GT/s x16 link) > [ 1138.124932] vfio-pci 0000:07:00.0: 32.000 Gb/s available PCIe bandwidth, > limited by 2.5 GT/s x16 link at 0000:00:02.0 (capable of 64.000 Gb/s with 5 > GT/s x16 link) > > What is the value of this nagging?
Good! The bandwidth notification service is working as intended. If this bothers you, you can unbind the device from the bandwidth notification driver:
echo 0000:07:00.0:pcie010 | sudo tee /sys/bus/pci_express/drivers/pcie_bw_notification/unbind
> diff --git a/drivers/pci/pcie/portdrv_core.c b/drivers/pci/pcie/portdrv_core.c > index 7d04f9d087a6..1b330129089f 100644 > --- a/drivers/pci/pcie/portdrv_core.c > +++ b/drivers/pci/pcie/portdrv_core.c > @@ -55,7 +55,8 @@ static int pcie_message_numbers(struct pci_dev *dev, int mask, > * 7.8.2, 7.10.10, 7.31.2. > */ > > - if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP)) { > + if (mask & (PCIE_PORT_SERVICE_PME | PCIE_PORT_SERVICE_HP | > + PCIE_PORT_SERVICE_BWNOTIF)) { > pcie_capability_read_word(dev, PCI_EXP_FLAGS, ®16); > *pme = (reg16 & PCI_EXP_FLAGS_IRQ) >> 9; > nvec = *pme + 1;
Good catch!
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