[pve-devel] [Qemu-devel] QEMU LIve Migration - swap_free: Bad swap file entry

[Stefan Priebe - Profihost AG]

Am 05.02.2014 21:15, schrieb Dr. David Alan Gilbert:
> * Stefan Priebe (s.priebe at profihost.ag) wrote:
>> Hello,
>>
>> after live migrating machines with a lot of memory (32GB, 48GB, ...)
>> i see pretty often crashing services after migration and the guest
>> kernel prints:
>>
>> [1707620.031806] swap_free: Bad swap file entry 00377410
>> [1707620.031806] swap_free: Bad swap file entry 00593c48
>> [1707620.031807] swap_free: Bad swap file entry 03201430
>> [1707620.031807] swap_free: Bad swap file entry 01bc5900
>> [1707620.031807] swap_free: Bad swap file entry 0173ce40
>> [1707620.031808] swap_free: Bad swap file entry 011c0270
>> [1707620.031808] swap_free: Bad swap file entry 03c58ae8
>> [1707660.749059] BUG: Bad rss-counter state mm:ffff88064d09f380
>> idx:1 val:1536
>> [1707660.749937] BUG: Bad rss-counter state mm:ffff88064d09f380
>> idx:2 val:-1536
>>
>> Qemu is 1.7
>>
>> Does anybody know a fix?
> 
> I don't, but some more information about:
>     1) What guest you're running

Linux guest the output is also from the guest. Kernel 3.10.26

>     2) The configuration of your hosts

What do you mean by that?

>     3) The command line (or XML if you're running libvirt) for
>        your qemu so we can see what devices you're running.

qemu -chardev
socket,id=qmp,path=/var/run/qemu-server/179.qmp,server,nowait -mon
chardev=qmp,mode=control -vnc
unix:/var/run/qemu-server/179.vnc,x509,password -pidfile
/var/run/qemu-server/179.pid -daemonize -name K31953 -smp
sockets=1,cores=16 -nodefaults -boot
menu=on,strict=on,reboot-timeout=1000 -vga cirrus -cpu
kvm64,+lahf_lm,+x2apic,+sep -k de -m 32768 -device
piix3-usb-uhci,id=uhci,bus=pci.0,addr=0x1.0x2 -device
usb-tablet,id=tablet,bus=uhci.0,port=1 -device
virtio-balloon-pci,id=balloon0,bus=pci.0,addr=0x3 -drive
if=none,id=drive-ide2,media=cdrom,aio=native -device
ide-cd,bus=ide.1,unit=0,drive=drive-ide2,id=ide2,bootindex=200 -device
virtio-scsi-pci,id=scsihw0,bus=pci.0,addr=0x5 -drive
file=rbd:...,if=none,id=drive-scsi0,iops_rd=1000,iops_wr=500,bps_rd=314572800,bps_wr=209715200,aio=native,discard=on
-device
scsi-hd,bus=scsihw0.0,channel=0,scsi-id=0,lun=0,drive=drive-scsi0,id=scsi0,bootindex=100
-netdev
type=tap,id=net0,ifname=tap179i0,script=/var/lib/qemu-server/pve-bridge,vhost=on
-device
virtio-net-pci,mac=CA:CA:23:AC:2D:C5,netdev=net0,bus=pci.0,addr=0x12,id=net0,bootindex=300
-rtc base=localtime -machine type=pc-i440fx-1.7

> Do you get any messages on either the source or destination
> qemu during the migrate?

no

Stefan