I also would rather like to find a proper fix than just revert that commit. Andrew, can you provide the info Boris was asking for? And just in general, is there something else that looks or goes wrong in the guest. The error looks to be originating from add_memory and EEXIST may be returned if register_memory_resource fails (though should do a pr_debug) or if it is not a new node (with another additional printk). So it sounds likely it it is the former (register_memory_resource) and adding a dyndbg="file xen-balloon.c +p" to the guests grub command line would activate the additional pr_debug lines.
-- 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: Confirmed 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
