** Changed in: linux-azure (Ubuntu Focal)
Status: In Progress => Fix Committed
** Changed in: linux-azure (Ubuntu Groovy)
Status: In Progress => Fix Committed
** Changed in: linux-azure-4.15 (Ubuntu Bionic)
Status: In Progress => Fix Committed
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https://bugs.launchpad.net/bugs/1908571
Title:
Enable boot from NVMe device for all images
Status in linux-azure package in Ubuntu:
New
Status in linux-azure-4.15 package in Ubuntu:
Invalid
Status in linux-azure source package in Bionic:
Invalid
Status in linux-azure-4.15 source package in Bionic:
Fix Committed
Status in linux-azure source package in Focal:
Fix Committed
Status in linux-azure-4.15 source package in Focal:
Invalid
Status in linux-azure source package in Groovy:
Fix Committed
Status in linux-azure-4.15 source package in Groovy:
Invalid
Bug description:
[Impact]
Azure is planning to have VM sizes that boot from NVMe storage, so the NVMe
drivers need to be in the kernel image itself, or if the NVMe driver is built
as a module, the module needs to be included in the initramfs file. Setting
CONFIG_HYPERV=Y, CONFIG_PCI_HYPERV=Y and CONFIG_BLK_DEV_NVME=Y does the former,
but the latter is acceptable.
Two out of the three configs are set to Y, but we would need
CONFIG_PCI_HYPERV set to Y to build the NVMe driver into the kernel.
Otherwise, we would need an initrd to all booting from NVMe
Microsoft would like to request either of these changes in all the
supported releases.
[Test Case]
The .ko file for the module shouldn't be present under
"/usr/lib/modules/$(uname -r)/".
But it should still be listed under "/sys/module/" for azure
instances.
[Where problems could occur]
There's no outstanding potential regressions from this change. Maybe
some bug with the config change itself might affect the kernel
packaging, but that's very unlikely.
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