** Changed in: linux (Ubuntu)
Status: In Progress => Fix Released
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https://bugs.launchpad.net/bugs/1720867
Title:
Trusty NVMe boot fails on some systems
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Trusty:
Fix Released
Bug description:
Trusty linux (3.13) fails to boot on some NVMe-based cloud instance
types.
[Impact]
* Ubuntu trusty images can't be used on some NVMe-based cloud
instance types.
* Mainline commit a522905 "NVMe: Always use MSI/MSI-x interrupts"
fixes the issue; application of this to 3.13 requires a set of
prerequisite patches, and a minor backport.
a522905 NVMe: Always use MSI/MSI-x interrupts
e32efbf NVMe: make setup work for devices that don't do INTx
be577fa nvme: Use pci_enable_msi_range() and pci_enable_msix_range()
42f6142 NVMe: per-cpu io queues
4f5099a NVMe: IOCTL path RCU protect queue access
5a92e70 NVMe: RCU protected access to io queues
[Test Case]
* Verify that a trusty-based image can boot on the affected instance
type.
[Regression Potential]
* This change set affects all users of the NVMe driver, so regression
potential is moderate to high. Additional soak testing may be
warranted before merging this patch set.
* The patched NVMe driver has been exercised by Dan Streetman, and
given the thumbs-up.
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