[PVE-User] Live migration fails with "Mismatched RAM page size ram-node0 (local) 2097152 != 1526773257204281392"

[Sergey Korobkov]

Hello,

Two exactly the same machines ( except ram size 380G and 1.5T ).

Upgraded on Debian 10.7 from:
pve-manager/6.1-5/9bf06119
Linux 5.3.13-1-pve #1 SMP PVE 5.3.13-1 (Thu, 05 Dec 2019 07:18:14 +0100)
QEMU emulator version 4.1.1 (pve-qemu-kvm_4.1.1)

to:
pve-manager/6.3-3/eee5f901
Linux 5.4.78-2-pve #1 SMP PVE 5.4.78-2 (Thu, 03 Dec 2020 14:26:17 +0100)
QEMU emulator version 5.1.0 (pve-qemu-kvm_5.1.0)

We had enabled hugepages for virtual machines( "hugepages: 2" specified 
in virtual machine description).

Live migration fails with errors like this:

Feb 02 16:26:13 QEMU[12090]: kvm7: load of migration failed: Invalid 
argument
Feb 02 16:26:13 QEMU[12090]: kvm7: error while loading state for
instance 0x0 of device 'ram'
Feb 02 16:26:13 QEMU[12090]: kvm7: Mismatched RAM page size ram-node0
(local) 2097152 != 1526773257204281392

We think it's some overflow issue.

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Sincerely yours,
Sergey.