I fail to come up with a use-case that just wants to add CPU/RAM without onlining it sooner or later. For virtual environments, you add CPU/RAM to use it and therefore want to online it once it appears. In a cloud environment (like ProfitBricks), it makes no sense to add CPU/RAM without using it, because you have to pay for it.
Hot-add is supposed to work on recent kernels (>= 3.10). Kernel 3.2 had an issue, but I can't remember if adding CPU/RAM or onlining it causes the issue. I would be happy to unconditionally turning hot-add on and SRU the udev rule back to Ubuntu 14.04. -- 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/1233466 Title: Hot-Add Memory failing for lack of udev rule Status in linux package in Ubuntu: Confirmed Status in systemd package in Ubuntu: Fix Released Bug description: It appears that the Hot-Add mechanism is not working because of lack of a udev rule. The required rule is attached to this bug. Please include it. Furthermore, please ensure that the following patches are included: https://git.kernel.org/cgit/linux/kernel/git/next/linux- next.git/commit/drivers/hv?id=20138d6cb838aa01bb1b382dcb5f3d3a119ff2cb https://git.kernel.org/cgit/linux/kernel/git/next/linux- next.git/commit/drivers/hv?id=c5e2254f8d63a6654149aa32ac5f2b7dd66a976d https://git.kernel.org/cgit/linux/kernel/git/next/linux- next.git/commit/drivers/hv?id=ed07ec93e83ec471d365ce084e43ad90fd205903 The above patches should be in but just wanted to ensure that you guys got these. Thanks again for the great last minute help. Abhishek To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1233466/+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
