--- Comment From barbara.mun...@de.ibm.com 2024-08-09 05:10 EDT---
As pointed out before, I consider the verification done. Bug can be closed.
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--- Comment From barbara.mun...@de.ibm.com 2024-07-19 02:38 EDT---
I verified that with 6.8.0-40-generic from -proposed the degradation is indeed
gone.
Thanks a lot!
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--- Comment From niklas.schne...@ibm.com 2024-07-03 06:53 EDT---
(In reply to comment #11)
> Looks like it's not sufficient to have IOMMU_DEFAULT_DMA_LAZY=y only
> in addition IOMMU_DEFAULT_DMA_STRICT=n seems to be needed on top (otherwise
> the build failed for me).
> (Which I think is not
--- 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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--- Comment From niklas.schne...@ibm.com 2024-07-01 04:49 EDT---
For reference the the CONFIG_DMA_DEFAULT_DMA setting is relevant to s390 only
since upstream commit c76c067e488c ("s390/pci: Use dma-iommu layer").
This commit also includes the following hunk to default to
CONFIG_DEFAULT_DMA
