Please open a new bug - thanks.
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https://bugs.launchpad.net/bugs/1448269
Title:
qemu guest hangs on nested kvm startup with host kernel oops
To manage notifications about this bug go
I'm seeing a similar issue with trying to install the latest 16.04.1
i386 edition
(http://releases.ubuntu.com/16.04/ubuntu-16.04.1-server-i386.iso) under
libvirt/virt-manager, on an amd64 VM running 16.04.1 (4.4.0-31-generic
#50-Ubuntu SMP Wed Jul 13 00:07:12 UTC 2016 x86_64 x86_64 x86_64
This bug was fixed in the package linux - 3.16.0-44.59
---
linux (3.16.0-44.59) utopic; urgency=low
[ Brad Figg ]
* Release Tracking Bug
- LP: #1472030
[ Iyappan Subramanian ]
* SAUCE: (no-up) drivers: net: xgene: fix: Out of order descriptor bytes
read
- LP:
This bug is awaiting verification that the kernel in -proposed solves
the problem. Please test the kernel and update this bug with the
results. If the problem is solved, change the tag 'verification-needed-
utopic' to 'verification-done-utopic'.
If verification is not done by 5 working days from
Verified this on my desktop.
** Tags removed: verification-needed-utopic
** Tags added: verification-done-utopic
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Title:
qemu guest hangs on
I've tested this on my own workstation starting nested VMs and also testing
other types of VMs I run on my system.
In addition I've also run kvm-unit-tests on this patchset and it has the same
results as before the patches.
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@arges
that kernel allows me to run accelerated kvm nested - thanks!
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https://bugs.launchpad.net/bugs/1448269
Title:
qemu guest hangs on nested kvm startup with host kernel oops
To
** Changed in: linux (Ubuntu Utopic)
Status: In Progress = Fix Released
** Changed in: linux (Ubuntu Utopic)
Status: Fix Released = Fix Committed
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** Description changed:
+ [Impact]
+ Users of nested KVM may experience the L1 VM hanging when booting an L2 VM.
Overall this seems to be due to issues with external interrupts not reaching L1
when L2 gets booted.
+
+ [Test Case]
+ Run a nested KVM instance:
+
** Also affects: linux (Ubuntu Utopic)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu Utopic)
Assignee: (unassigned) = Chris J Arges (arges)
** Changed in: linux (Ubuntu)
Assignee: Chris J Arges (arges) = (unassigned)
** Changed in: linux (Ubuntu)
A test build with the fix is available here:
http://people.canonical.com/~arges/lp1448269/
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Title:
qemu guest hangs on nested kvm startup with
Ok I can repro on this end. I'll start debugging this.
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Title:
qemu guest hangs on nested kvm startup with host kernel oops
To manage
I had this issue (kernel oops) when I explicitly disabled ignore_msrs
(Ubuntu Trusty, 3.13.0-54-generic):
cat /etc/modprobe.d/qemu-system-x86.conf
options kvm-intel nested=y ept=y
options kvm ignore_msrs=1
Removing the option kvm ignore_msrs=1 made the guest (L2) run but give
a KVM: entry
I had made no changes, i.e.
options kvm_intel nested=1
I've changed that to 0 to get past crashes during automated testing,
but have not added ignore_msrs=1.
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** Changed in: linux (Ubuntu)
Status: Triaged = In Progress
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Title:
qemu guest hangs on nested kvm startup with host kernel oops
To
With 3.16.0-37-generic on the host, i no longer get an oops on the host,
and the guest instantly reboots rather than hanging.
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Title:
qemu guest
This happens with both (first-level) guest kernels 3.19.0-20-generic and
3.19.0-18-generic
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Title:
qemu guest hangs on nested kvm startup with
** Changed in: linux (Ubuntu)
Importance: Undecided = Medium
** Tags added: kernel-da-key
** Tags added: bot-stop-nagging
** Changed in: linux (Ubuntu)
Status: Incomplete = Triaged
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1) Can you dump the domain XML (if using libvirt), or qemu command used to
invoke the VM. I'm wondering if there is some cpu feature mismatch going on.
2) Can you do 'tail /sys/module/kvm_intel/parameters/*'?
Looks like WARN here:
/*
Quoting Chris J Arges (1448...@bugs.launchpad.net):
1) Can you dump the domain XML (if using libvirt), or qemu command used to
invoke the VM. I'm wondering if there is some cpu feature mismatch going on.
domain type='kvm'
namep9/name
uuid558ac100-65d0-437b-b19b-7d8946b92b8d/uuid
memory
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