Munehisa Kamata (https://launchpad.net/~kamatam) took at a look at this from our side and he believes that
"the following commit has introduced this. It is in Linux kernel 3.13 or later, and I've confirmed that kernel 3.14 still shows the same symptom. http://git.kernel.org/cgit/linux/kernel/git/torvalds/linux.git/commit/drivers/xen/balloon.c?id=c275a57f5ec3056f732843b11659d892235faff7 Looking at the change, only HVM will exhibit this. Also, it seems that this can only happen on c3.large and m3.medium, they have < 4GB of memory. The following discussion may be related to this, but I'm not sure if it is. http://lists.xen.org/archives/html/xen-devel/2014-01/msg01524.html" -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux in Ubuntu. https://bugs.launchpad.net/bugs/1304001 Title: xen:balloon errors in 14.04 beta Status in “linux” package in Ubuntu: Incomplete Bug description: Xen balloon errors on HVM instances on EC2 (Xen 4.2.amazon): ubuntu@ip-10-63-20-99:~$ uname -a Linux ip-10-63-20-99 3.13.0-23-generic #45-Ubuntu SMP Fri Apr 4 06:58:38 UTC 2014 x86_64 x86_64 x86_64 GNU/Linux ubuntu@ip-10-63-20-99:~$ dmesg |grep xen [ 0.000000] xen:events: Xen HVM callback vector for event delivery is enabled [ 0.494613] xen:balloon: Initialising balloon driver [ 0.496046] xen_balloon: Initialising balloon driver [ 0.500077] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 0.541047] Switched to clocksource xen [ 0.562579] xen: --> pirq=16 -> irq=8 (gsi=8) [ 0.562622] xen: --> pirq=17 -> irq=12 (gsi=12) [ 0.562649] xen: --> pirq=18 -> irq=1 (gsi=1) [ 0.562673] xen: --> pirq=19 -> irq=6 (gsi=6) [ 0.562705] xen: --> pirq=20 -> irq=4 (gsi=4) [ 0.920527] xen: --> pirq=21 -> irq=47 (gsi=47) [ 0.920596] xen:grant_table: Grant tables using version 1 layout [ 1.029661] xen_netfront: Initialising Xen virtual ethernet driver [ 1.236083] xenbus_probe_frontend: Device with no driver: device/vfb/0 [ 2.516067] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 6.533941] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 14.560075] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 30.592064] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 62.688153] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 94.752164] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 126.816161] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 158.880084] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 190.944069] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 223.008141] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 255.072112] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 287.136190] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 319.200053] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 351.264164] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 383.328080] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 415.392077] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 447.456112] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 479.520128] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 511.584110] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 543.648181] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 575.712070] xen:balloon: reserve_additional_memory: add_memory() failed: -17 [ 607.776178] xen:balloon: reserve_additional_memory: add_memory() failed: -17 To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1304001/+subscriptions -- Mailing list: https://launchpad.net/~kernel-packages Post to : kernel-packages@lists.launchpad.net Unsubscribe : https://launchpad.net/~kernel-packages More help : https://help.launchpad.net/ListHelp