This bug is missing log files that will aid in diagnosing the problem. While running an Ubuntu kernel (not a mainline or third-party kernel) please enter the following command in a terminal window:
apport-collect 1759893 and then change the status of the bug to 'Confirmed'. If, due to the nature of the issue you have encountered, you are unable to run this command, please add a comment stating that fact and change the bug status to 'Confirmed'. This change has been made by an automated script, maintained by the Ubuntu Kernel Team. ** Changed in: linux (Ubuntu) Status: New => Incomplete -- 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/1759893 Title: [18.04][config] regression: nvme and nvme_core couldn't be built as modules starting 4.15-rc2 Status in linux package in Ubuntu: Incomplete Bug description: Some regression was introduced into NVME-related kernel configuration by 32c662c58a9b9 into 4.15-rc2, which was pulled later into ubuntu- bionic.git In result, "nvme" and "nvme_core" drivers are built into the kernel, we can't build them as modules. It caused incompatibility of NMVe-OF target and initiator modules (nvmet, nvme-rdma) installed by Mellanox OFED with the inbox "nvme" driver. Root cause analysis. In the drivers/lightnvm/Kconfig file - kernel configuration for the OpenChannel SSDs (lightnvm) we have: menuconfig NVM bool "Open-Channel SSD target support" depends on BLOCK && HAS_DMA && PCI select BLK_DEV_NVME help Say Y here to get to enable Open-channel SSDs. ... It means that BLK_DEV_NVME is selected to "y" when NVM (CONFIG_NVM) is selected. NVM parameter is 2 state (on / off, i.e. "y" or "no"), it couldn't be built as a module. So that it triggers the change of BLK_DEV_NAME=y and NVME_CORE=y $ git blame drivers/lightnvm/Kconfig 32c662c58a9b9 (Rakesh Pandit 2017-10-13 14:45:55 +0200 7) depends on BLOCK && HAS_DMA && PCI 32c662c58a9b9 (Rakesh Pandit 2017-10-13 14:45:55 +0200 8) select BLK_DEV_NVME commit 32c662c58a9b9d0c99e713a14ca323a9a91c73a0 Author: Rakesh Pandit <rak...@tuxera.com> Date: Fri Oct 13 14:45:55 2017 +0200 lightnvm: include NVM Express driver if OCSSD is selected for build Because NVM needs BLK_DEV_NVME, select it automatically if we mark NVM in config file before building kernel. Also append PCI to depends as select doesn't automatically add dependencies. Signed-off-by: Rakesh Pandit <rak...@tuxera.com> Signed-off-by: Matias Bjørling <m...@bjorling.me> Signed-off-by: Jens Axboe <ax...@kernel.dk> drivers/lightnvm/Kconfig | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) $ git diff 32c662c58a9b9^1..32c662c58a9b9 diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig index ead61a93cb4e..2a953efec4e1 100644 --- a/drivers/lightnvm/Kconfig +++ b/drivers/lightnvm/Kconfig @@ -4,7 +4,8 @@ menuconfig NVM bool "Open-Channel SSD target support" - depends on BLOCK && HAS_DMA + depends on BLOCK && HAS_DMA && PCI + select BLK_DEV_NVME help Say Y here to get to enable Open-channel SSDs. Proposed fix is following: diff --git a/drivers/lightnvm/Kconfig b/drivers/lightnvm/Kconfig index 2a953efec4e1..9969236314d7 100644 --- a/drivers/lightnvm/Kconfig +++ b/drivers/lightnvm/Kconfig @@ -4,8 +4,7 @@ menuconfig NVM bool "Open-Channel SSD target support" - depends on BLOCK && HAS_DMA && PCI - select BLK_DEV_NVME + depends on BLOCK && HAS_DMA && PCI && BLK_DEV_NVME help Say Y here to get to enable Open-channel SSDs. Regards, Yurii Shestakov To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1759893/+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