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
---
AlsaDevices:
total 0
crw-rw---- 1 root audio 116, 1 Dec 18 20:02 seq
crw-rw---- 1 root audio 116, 33 Dec 18 20:02 timer
AplayDevices: Error: [Errno 2] No such file or directory
ApportVersion: 2.20.1-0ubuntu2.18
Architecture: amd64
ArecordDevices: Error: [Errno 2] No such file or directory
AudioDevicesInUse: Error: command ['fuser', '-v', '/dev/snd/seq', '/dev/snd/timer'] failed with exit code 1:
DistroRelease: Ubuntu 16.04
HibernationDevice: RESUME=UUID=d1a63627-71f0-4d12-90cb-025ed3aa8439
IwConfig: Error: [Errno 2] No such file or directory
MachineType: Supermicro X8DTH-i/6/iF/6F
Package: linux (not installed)
PciMultimedia:
ProcFB: 0 mgadrmfb
ProcKernelCmdLine: BOOT_IMAGE=/vmlinuz-4.15.0-42-generic root=UUID=7d5fdcc6-37a6-4b95-bf01-4f5c9637720b ro biosdevname=0 net.ifnames=0 splash intel_iommu=on quiet audit=1 vt.handoff=7
ProcVersionSignature: Ubuntu 4.15.0-42.45~16.04.1-generic 4.15.18
RelatedPackageVersions:
linux-restricted-modules-4.15.0-42-generic N/A
linux-backports-modules-4.15.0-42-generic N/A
linux-firmware 1.157.21
RfKill: Error: [Errno 2] No such file or directory
Tags: xenial xenial
Uname: Linux 4.15.0-42-generic x86_64
UnreportableReason: The report belongs to a package that is not installed.
UpgradeStatus: No upgrade log present (probably fresh install)
UserGroups:
_MarkForUpload: False
dmi.bios.date: 05/04/12
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 2.1b
dmi.board.asset.tag: To Be Filled By O.E.M.
dmi.board.name: X8DTH
dmi.board.vendor: Supermicro
dmi.board.version: 1234567890
dmi.chassis.asset.tag: To Be Filled By O.E.M.
dmi.chassis.type: 17
dmi.chassis.vendor: Supermicro
dmi.chassis.version: 1234567890
dmi.modalias: dmi:bvnAmericanMegatrendsInc.:bvr2.1b:bd05/04/12:svnSupermicro:pnX8DTH-i/6/iF/6F:pvr1234567890:rvnSupermicro:rnX8DTH:rvr1234567890:cvnSupermicro:ct17:cvr1234567890:
dmi.product.family: Server
dmi.product.name: X8DTH-i/6/iF/6F
dmi.product.version: 1234567890
dmi.sys.vendor: Supermicro
4.18.0 is also affected.
Installed the pkg on xenial, and the same issue was present, i didn't tested disabling the transparent_
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