** Description changed: SRU Justification [Impact] * 20.04 Azure CVM (with 5.15 kernel) instances are failing to boot with high reproducibility [Fix] * Clean reverts of the following commits: * 8bd834015a5e: "UBUNTU: SAUCE: swiotlb: Split up single swiotlb lock" * 3db34e258474: "UBUNTU: SAUCE: swiotlb: allocate memory in a cache-friendly way" * 9e1b646a9cac: "UBUNTU: SAUCE: swiotlb: use bitmap to track free slots" + + * Backport "cbf53074a528: swiotlb: Honour dma_alloc_coherent() alignment + in swiotlb_alloc() from upstream" [Test Plan] * Compile tested * Boot tested * Tested with Azure images, booted successfully 25 consecutive times [Regression potential] * Changes isolated, minimal regression risk. Changes were SAUCE patches, so reverting back to upstream functionality. * Likely small I/O performance hit under heavy I/O, but alleviates system hangs [Other info] * SF#00405149
-- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/2096813 Title: Ubuntu 20.04 confidential VM deployments are failing To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux-azure/+bug/2096813/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
