Messages Logs Flooded With Xen_balloon: Reserve_additional_memory: Add_memory() Failed

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My /var/log/messages log is being flooded with kernel messages showing the following messages

Aug 1 11:22:52 host43 kernel: System RAM resource 48000000 – 4fffffff cannot be added Aug 1 11:22:52 host43 kernel: xen_balloon: reserve_additional_memory: add_memory() failed: –17

Doing a search I found a thread from xen-devel that talks a bit about it. I’m not sure if this is related to the same issue or if that issue was ever fixed. When I cat current_kb and target_kb the values don’t match, they are just barely off. I have not tried setting them to match yet.

http://marc.info/?t=135601508900004&r=1&w=3

[root@host ~]# cat /sys/devices/system/xen_memory/xen_memory0/info/current_kb
1048532
[root@host ~]# cat /sys/devices/system/xen_memory/xen_memory0/target_kb
1048576

Any ideas?

2 thoughts on - Messages Logs Flooded With Xen_balloon: Reserve_additional_memory: Add_memory() Failed

  • Yesterday I’ve decided to give CentOS xen a try and I get this messages also.

    [root@fhpxen1 ~]# dmesg -c System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    device vif10.0 entered promiscuous mode ADDRCONF(NETDEV_UP): vif10.0: link is not ready device vif10.0-emu entered promiscuous mode virbr0: topology change detected, propagating virbr0: port 2(vif10.0-emu) entered forwarding state virbr0: port 2(vif10.0-emu) entered forwarding state System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added xen_balloon: reserve_additional_memory: add_memory() failed: -17
    System RAM resource 48000000 – 4fffffff cannot be added

    [root@fhpxen1 ~]# cat
    /sys/devices/system/xen_memory/xen_memory0/info/current_kb
    1048568
    [root@fhpxen1 ~]# cat /sys/devices/system/xen_memory/xen_memory0/target_kb
    1048576
    [root@fhpxen1 ~]#

    [root@fhpxen1 ~]# xl info host : fhpxen1
    release : 3.4.54-8.el6.CentOS.alt.x86_64
    version : #1 SMP Tue Jul 23 17:29:30 UTC 2013
    machine : x86_64
    nr_cpus : 8
    max_cpu_id : 7
    nr_nodes : 1
    cores_per_socket : 4
    threads_per_core : 2
    cpu_mhz : 3400
    hw_caps :
    bfebfbff:2c100800:00000000:00007f40:77fafbff:00000000:00000021:00002fbb virt_caps : hvm hvm_directio total_memory : 32630
    free_memory : 28071
    sharing_freed_memory : 0
    sharing_used_memory : 0
    free_cpus : 0
    xen_major : 4
    xen_minor : 2
    xen_extra : .2-23.el6
    xen_caps : xen-3.0-x86_64 xen-3.0-x86_32p hvm-3.0-x86_32
    hvm-3.0-x86_32p hvm-3.0-x86_64
    xen_scheduler : credit xen_pagesize : 4096
    platform_params : virt_start=0xffff800000000000
    xen_changeset : unavailable xen_commandline : dom0_mem=1024M,max:1024M loglvl=all guest_loglvl=all cc_compiler : gcc (GCC) 4.4.7 20120313 (Red Hat 4.4.7-3)
    cc_compile_by : mockbuild cc_compile_domain : CentOS.org cc_compile_date : Thu Jul 18 13:42:23 UTC 2013
    xend_config_format : 4

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