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73416ba
(Get the code!)
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 currently able to reproduce this issue using openstack to spin up vms and attach volumes using the following script:
http://
I currently hit this issue with 1/2 instrances.