------- Comment From niklas.schne...@ibm.com 2024-07-03 05:24 EDT-------
Interesting with "make defconfig" on upstream I get

?
# CONFIG_IOMMU_DEFAULT_DMA_STRICT is not set
CONFIG_IOMMU_DEFAULT_DMA_LAZY=y
?

And that works well.

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https://bugs.launchpad.net/bugs/2071471

Title:
  [UBUNTU 24.04] IOMMU DMA mode changed in kernel config causes massive
  throughput degradation for PCI-related network workloads

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