This bug is awaiting verification that the linux- aws-5.15/5.15.0-1046.51~20.04.1 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-focal-linux- aws-5.15' to 'verification-done-focal-linux-aws-5.15'. If the problem still exists, change the tag 'verification-needed-focal-linux-aws-5.15' to 'verification-failed-focal-linux-aws-5.15'.
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-focal-linux-aws-5.15-v2 verification-needed-focal-linux-aws-5.15 -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1989990 Title: [SRU] Ubuntu 22.04 - NVMe TCP - Host fails to reconnect to target after link down/link up sequence Status in linux package in Ubuntu: Invalid Status in linux source package in Jammy: Fix Released Bug description: [Impact] Ubuntu 22.04 host fails to reconnect successfully to the NVMe TCP target after link down event if the number of queues have changed post link down. [Fix] Following upstream patch set helps address the issue. 1. nvmet: Expose max queues to configfs https://git.infradead.org/nvme.git/commit/2c4282742d049e2a5ab874e2b359a2421b9377c2 2. nvme-tcp: Handle number of queue changes https://git.infradead.org/nvme.git/commit/516204e486a19d03962c2757ef49782e6c1cacf4 3. nvme-rdma: Handle number of queue changes https://git.infradead.org/nvme.git/commit/e800278c1dc97518eab1970f8f58a5aad52b0f86 The patch in Point 2 above helps address the failure to reconnect in NVMe TCP scenario. Also, following patch addresses error code parsing issue in the reconnect sequence. nvme-fabrics: parse nvme connect Linux error codes https://git.infradead.org/nvme.git/commit/ec9e96b5230148294c7abcaf3a4c592d3720b62d [Test Plan] 1. Boot into Ubuntu 22.04 kernel without fix. 2. Establish connection to NVMe TCP target. 3. Toggle NIC link and bring link up after 10 seconds. When the NIC link is down, on the target increase the number of queues assigned to the controller. 4. Observe that connection to target is lost and after link comes up, controller from host tries to re-establish connection. 5. With patch, reconnection succeeds with higher number of queues [Where problems could occur] Regression risk is low to medium. [Other Info] Test Kernel Source https://code.launchpad.net/~mreed8855/ubuntu/+source/linux/+git/jammy/+ref/lp_1989990_nvme_tcp To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1989990/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp
