Public bug reported: My server is : PowerEdge T630 2x Intel(R) Xeon(R) CPU E5-2623 v4 @ 2.60GHz 128G of ram 4x VGA compatible controller [0300]: NVIDIA Corporation GP102 [TITAN X] [10de:1b00] (rev a1)
Starting 116G ram 16vcpus + 4 pci passthrough allocating memory stops after about half of the memory. When upgrading from kernel 4.13.0 to 4.15.0 starting a vm takes a long time. I tested kernel : linux-image-4.13.0-37 not affected linux-image-4.13.0-45 not affected linux-image-4.15.0-34 affected linux-image-4.15.0-42 affected After disabling transparent_hugepage on 4.15 everything seems to work correctly. cat /proc/cmdline BOOT_IMAGE=/boot/vmlinuz-4.15.0-42-generic root=UUID=<some uuid> ro intel_iommu=on transparent_hugepage=never splash quiet vt.handoff=7 ** Affects: linux (Ubuntu) Importance: Undecided Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1808412 Title: 4.15.0 memory allocation issue To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1808412/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs