Public bug reported: I have Ubuntu Precise guests running in kvm to which I attach volumes immediately after boot. Sometimes I notice that the devices do not show up in the guest e.g. they are not visible in /proc/partitions and dmesg boot log shows no sign of then being noticed. Qemu itself shows that the devices are attached and if I do a rescan within the guest the devices appear. A reboot also cause the devices to appear. So, it feels like there is enough evidence to suggest that the devices were properly attached by qemu/seabios but they just didn't get noticed by the guest.
This issue is reproducible with Precise running 3.2, 3.5 (lts-quantal) and 3.8 (lts-raring) kernels but not as of 3.11 (lts-saucy) so it would appear that something changed between 3.8 and 3.11 that resolved this issue and if we can identify it we should backport to 3.2. I am able to reproduce this issue using Openstack to spin up vms and attach volumes using the following script: http://pastebin.ubuntu.com/11954253/ I hit this issue with 1/2 instances. ** Affects: linux (Ubuntu) Importance: Undecided Status: Fix Released ** Affects: linux (Ubuntu Precise) Importance: Undecided Assignee: Chris J Arges (arges) Status: New -- You received this bug notification because you are a member of Ubuntu Bugs, which is subscribed to Ubuntu. https://bugs.launchpad.net/bugs/1479031 Title: attached block devices not showing up To manage notifications about this bug go to: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1479031/+subscriptions -- ubuntu-bugs mailing list ubuntu-bugs@lists.ubuntu.com https://lists.ubuntu.com/mailman/listinfo/ubuntu-bugs
