On 26/03/15 19:37, Mark wrote:
Hi,
We're trying to nest virtualisation using 64bit Xen inside a Hyper-V
virtual machine.
When we enable CONFIG_HYPERV_STORAGE and boot with the Xen hypervisor
we can't see /dev/sda. If we boot the Linux kernel without Xen it
works fine.
The full dmesg for booting with and without Xen is attached.
Without Xen, first the disk is deliberately ignored:
[ 3.728055] ata_piix 0000:00:07.1: Hyper-V Virtual Machine
detected, ATA device ignore set
And later picked up by hv_storevsc:
[ 8.432089] scsi host0: storvsc_host_t
[ 8.432946] scsi 0:0:0:0: Direct-Access Msft Virtual Disk
1.0 PQ: 0 ANSI: 4
[ 8.434538] scsi host1: storvsc_host_t
[ 8.435324] sd 0:0:0:0: Attached scsi generic sg0 type 0
Any ideas why sda is never attached under Xen or how I can further
diagnose this?
We would need to see `xl dmesg` to get the Xen dmesg ring as well,
preferably with a debug build of Xen.
~Andrew
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