Hey folks, I think we may have encountered this or a variant of this while running extremely strenuous Ceph performance tests on a very high speed cluster we designed for a customer. We have a write-up that includes a section on needing to disable iommu here:
https://ceph.io/en/news/blog/2024/ceph-a-journey-to-1tibps/ Good job figuring this one out to everyone involved! -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2064999 Title: Prevent soft lockups during IOMMU streaming DMA mapping by limiting nvme max_hw_sectors_kb to cache optimised size To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/2064999/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
