We have just encountered this issue on a large deployment on one random node, but it's not a Power8 machines -- just a regular HP DL360. Here's an excerpt from the log:
[ 15.623526] tty ttyS9: hash matches [ 15.625028] rtc_cmos 00:00: setting system clock to 2017-06-07 00:45:20 UTC (1496796320) [ 15.627839] BIOS EDD facility v0.16 2004-Jun-25, 0 devices found [ 15.629838] EDD information not available. [ 15.631363] md: Waiting for all devices to be available before autodetect [ 15.661880] md: If you don't use raid, use raid=noautodetect [ 15.687911] md: Autodetecting RAID arrays. [ 15.706358] md: Scanned 0 and added 0 devices. [ 15.726206] md: autorun ... [ 15.738696] md: ... autorun DONE. [ 15.753535] VFS: Cannot open root device "disk/by-path/ip-10.144.10.62:3260-iscsi-iqn.2004-05.com.ub" or unknown-block(0,0): error -6 [ 15.807400] Please append a correct "root=" boot option; here are the available partitions: [ 15.845000] Kernel panic - not syncing: VFS: Unable to mount root fs on unknown-block(0,0) I bet this is not actually a Power problem, but instead something which causes the iscsi mount to fail. -- You received this bug notification because you are a member of Kernel Packages, which is subscribed to linux-lts-vivid in Ubuntu. https://bugs.launchpad.net/bugs/1547192 Title: power8 kernel panic Status in linux package in Ubuntu: Confirmed Status in linux-lts-vivid package in Ubuntu: Confirmed Bug description: I ran into this bug while trying to deploy a power8 (powerVM) LPAR via MAAS. I was using Trusty with hwe-v kernel. Most of the time, using the same images, I never have issues but I have seen this panic happen randomly. Here is the output from the console during deployment: http://paste.ubuntu.com/15117191/ This should have the information that is needed. To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1547192/+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
