This bug is awaiting verification that the linux-azure- nvidia/6.8.0-1024.26 kernel in -proposed solves the problem. Please test the kernel and update this bug with the results. If the problem is solved, change the tag 'verification-needed-noble-linux-azure-nvidia' to 'verification-done-noble-linux-azure-nvidia'. If the problem still exists, change the tag 'verification-needed-noble-linux-azure-nvidia' to 'verification-failed-noble-linux-azure-nvidia'.
If verification is not done by 5 working days from today, this fix will be dropped from the source code, and this bug will be closed. See https://wiki.ubuntu.com/Testing/EnableProposed for documentation how to enable and use -proposed. Thank you! ** Tags added: kernel-spammed-noble-linux-azure-nvidia-v2 verification-needed-noble-linux-azure-nvidia -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-nvidia-lowlatency in Ubuntu. https://bugs.launchpad.net/bugs/2119661 Title: Set CONFIG_IOMMU_DEFAULT_DMA_LAZY as default for Nvidia CPUs Status in linux-nvidia-6.11 package in Ubuntu: Invalid Status in linux-nvidia-6.14 package in Ubuntu: Invalid Status in linux-nvidia-lowlatency package in Ubuntu: Invalid Status in linux-nvidia-6.11 source package in Noble: Fix Committed Status in linux-nvidia-6.14 source package in Noble: Fix Committed Status in linux-nvidia-lowlatency source package in Noble: Fix Committed Bug description: CONFIG_IOMMU_DEFAULT_DMA_LAZY is disabled for ARM as not all ARM IOMMU support passthrough and LAZY mode. Nvidia CPU SMMU supports passthrough and lazy IOMMU mode so set lazy mode as default for better performance. We need this 24.04 HWE and LTS versions. perf numbers: 2 Grace sockets, 4 SSDs per socket. All 4 SSDs in a socket connected to the same PCIe root port. SSD model: SAMSUNG MZTL63T8HFLT-00AW7 4KiB random read performance per disk: 1.7-2M IOPs (the spec says 1.7, but we are able to hit 2M) IOMMU config | IOPs (M) passthrough | 16.5 lazy invalidations | 16.4 strict invalidations | 2.8 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-nvidia-6.11/+bug/2119661/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : [email protected] Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
