I made a test available with the fix at https://kernel.ubuntu.com/~mhcerri/azure/lp1896760.1/focal-linux- azure-5.4.0-1027.27+lp1896760.1.tgz
And microsoft has confirmed the fix solves the issue. ** Description changed: + [Impact] + Mellanox has made a patch to fix DPDK failure in Azure with ConnextX3 pro: https://git.kernel.org/pub/scm/linux/kernel/git/next/linux- next.git/commit/drivers/infiniband/hw/mlx4?h=next-20200908&id=ec78b3bd66bc9a015505df0ef0eb153d9e64b03b Older kernels don't need this patch. It only affects newer kernels with the following patch: commit 9012a6de6b43146c934752a60d358c31dbad4368 Author: Kamal Heib <[email protected]> Date: Tue May 19 13:12:17 2020 -0400 [infiniband] IB/core: Fix potential NULL pointer dereference in pkey cache If a kernel ships with this patch, it needs the 1st patch. + + [Test Case] + + Boot the current 5.4 linux-azure kernel from focal-updates (5.4.0-48.52) + on an Azure instance with a mlx4 device without RoCE support, the + devices are wrongly ignored. + + The expected result is that those devices are created an available. + + [Regression Potential] + + A potential regression would only affect instances running the linux- + azure 5.4 kernels with mlx4 devices. -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1896760 Title: Mellanox patch for fixing failures in ConnectX3 Pro/DPDK To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1896760/+subscriptions -- ubuntu-bugs mailing list [email protected] https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
