* [PVE-User] Live migration fails with "Mismatched RAM page size ram-node0 (local) 2097152 != 1526773257204281392"
@ 2021-02-02 14:50 Sergey Korobkov
2021-02-04 16:59 ` Stefan Reiter
0 siblings, 1 reply; 2+ messages in thread
From: Sergey Korobkov @ 2021-02-02 14:50 UTC (permalink / raw)
To: pve-user; +Cc: Damir Chanyshev
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.
------------------
Sincerely yours,
Sergey.
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: [PVE-User] Live migration fails with "Mismatched RAM page size ram-node0 (local) 2097152 != 1526773257204281392"
2021-02-02 14:50 [PVE-User] Live migration fails with "Mismatched RAM page size ram-node0 (local) 2097152 != 1526773257204281392" Sergey Korobkov
@ 2021-02-04 16:59 ` Stefan Reiter
0 siblings, 0 replies; 2+ messages in thread
From: Stefan Reiter @ 2021-02-04 16:59 UTC (permalink / raw)
To: Sergey Korobkov; +Cc: Damir Chanyshev, Proxmox VE user list
On 02/02/2021 15:50, Sergey Korobkov wrote:
> 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.
>
Hi!
After looking carefully I believe to have found the root cause of this
issue in an upstream bug that we run into since pve-qemu-kvm 5.1.0-4,
where we started migrating dirty bitmaps.
I have sent a potential fix to the upstream qemu-devel mailing list:
https://lists.nongnu.org/archive/html/qemu-devel/2021-02/msg01711.html
If the resident experts on there agree that this is indeed the solution,
we will most likely ship it once we release our QEMU 5.2 build :)
Thanks for the report!
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-02-02 14:50 [PVE-User] Live migration fails with "Mismatched RAM page size ram-node0 (local) 2097152 != 1526773257204281392" Sergey Korobkov
2021-02-04 16:59 ` Stefan Reiter
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