Public bug reported: While testing the final build of 14.10 32bit we found that kernel panic cannot be activated for an installation on a Hyper-V VM.
Repro rate: 100% Repro details: Hyper-V: Server 2012 R2 VM: Ubuntu 14.10 32bit Kdump is enabled in the config file at /etc/default/kdump-tools Different crashkernel values used in grub.cfg – 128M-:64M | 256M-:128m | 384M-:256M VM settings: 2 cores, various RAM sizes attempted: 1, 2 or 4 GB – this in combination with the values for crashkernel. Trying to start the kdump service: root@ubuntu1410i386:~# /etc/init.d/kdump-tools start Starting kdump-tools: Could not find a free area of memory of 0x9f000 bytes... locate_hole failed * failed to load kdump kernel --- root@ubuntu1410i386:~# cat /sys/kernel/kexec_crash_loaded 0 If the conversion from hex to dec is right, the mentioned memory mapping of 0x9f000 bytes is equal to 651264 (bytes), so under 1MB. This is not then related to the RAM allocation nor the crashkernel value used. ** Affects: linux (Ubuntu) Importance: Undecided Status: New ** Tags: hyperv -- 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/1400319 Title: [Hyper-V] Kernel panic not functional on 32bit Ubuntu 14.10 Status in linux package in Ubuntu: New Bug description: While testing the final build of 14.10 32bit we found that kernel panic cannot be activated for an installation on a Hyper-V VM. Repro rate: 100% Repro details: Hyper-V: Server 2012 R2 VM: Ubuntu 14.10 32bit Kdump is enabled in the config file at /etc/default/kdump-tools Different crashkernel values used in grub.cfg – 128M-:64M | 256M-:128m | 384M-:256M VM settings: 2 cores, various RAM sizes attempted: 1, 2 or 4 GB – this in combination with the values for crashkernel. Trying to start the kdump service: root@ubuntu1410i386:~# /etc/init.d/kdump-tools start Starting kdump-tools: Could not find a free area of memory of 0x9f000 bytes... locate_hole failed * failed to load kdump kernel --- root@ubuntu1410i386:~# cat /sys/kernel/kexec_crash_loaded 0 If the conversion from hex to dec is right, the mentioned memory mapping of 0x9f000 bytes is equal to 651264 (bytes), so under 1MB. This is not then related to the RAM allocation nor the crashkernel value used. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1400319/+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