** Description changed:
[Impact]
- on openstack rocky-bionic (with patch, see 1771662), xenial guests will fail
to launch as they drop to the busybox prompt after booting.
+ on openstack rocky-bionic (with patch, see 1771662), xenial guests will fail
to launch as they drop to the busybox
I'm not aware of any armhf hardware that has PCI and was supported by
the 4.4 kernel. Calxeda gear maybe - but that was never officially
released and I don't have access to it anyway.
I did regression test using the virt model in QEMU. System still boots, lspci
smoke tests OK:
ubuntu@ubuntu:~$
Regression tested on ThunderX/X-Gene, which I believe were the only 2
arm64 servers supported by the 4.4 kernel.
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Title:
xenial
@ppisati: Would you be able to regression test this on armhf?
** Description changed:
- on openstack rocky-bionic (with patch, see 1771662), xenial guests will
- fail to launch as they drop to the busybox prompt after booting.
- However, bionic guests will build and launch successfully.
+
** Tags removed: performing-bisect
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Title:
xenial guest on arm64 drops to busybux under openstack bionic-rocky
Status in linux
I've backported the necessary fixes and verified that the result does solve the
problem:
https://git.launchpad.net/~dannf/ubuntu/+source/linux/+git/linux?h=xenial-arm64-acpi-pci
That being said, the changes are not particularly isolated, so it will
require careful review and testing for
There was no v4.6-yakkety build for arm64, but v4.8 booted fine. I
further bisected this down to:
0cb0786bac159 ARM64: PCI: Support ACPI-based PCI host controller
Presumably nova in newer OpenStack releases has made changes to the
libvirt xml it generates that requires additional kernel support.
I'd like to perform a "Reverse" bisect to figure out what commit fixes
this bug. We need to identify the last kernel version that had the bug,
and the first kernel version that fixed the bug.
Can you test the following kernels and report back:
v4.6 Final:
@Joseph I think I have bandwidth, please provide specific links and
instructions:)
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Title:
xenial guest on arm64 drops to busybux
Would it be possible for you to test out some test kernels? That would
allow us to reverse bisect and identify any missing commits from the 4.4
kernel.
** Tags added: performing-bisect
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** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Also affects: linux (Ubuntu Bionic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Bionic)
Importance: Undecided => High
** Changed in: linux (Ubuntu Bionic)
Status: New => Triaged
** Changed
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