** Tags added: cscc
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https://bugs.launchpad.net/bugs/1682077
Title:
nested KVM fails - KVM: entry failed, hardware error 0x0
Status in linux package in Ubuntu:
This happens in about half of the xenial semaphoreci.com instances as
well:
$ uname -a
Linux semaphore-light-1809b 4.4.0-131-generic #157-Ubuntu SMP Thu Jul 12
15:51:36 UTC 2018 x86_64 x86_64 x86_64 GNU/Linux
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Reproduced in Intel(R) Xeon(R) Gold 5120 CPU @ 2.20GHz
Ubuntu 16.04.5 LTS
4.4.0-134-generic
libvirt 4.0.0
QEMU 4.0.0
Running hypervisor: QEMU 2.11.1
Nested KVM not working, instances log "KVM: entry failed, hardware error
0x0"
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I am sorry if this bug is to old, but i have this problem and cannot
find the solution until now.
I can reproduce this bug with following HW:
Ubuntu 16.04.5 LTS
Kernel 4.4.0-131-generic
libvirtd (libvirt) 1.3.1
QEMU emulator version 2.5.0 (Debian 1:2.5+dfsg-5ubuntu10.32)
Intel(R) Xeon(R) Gold
Running into the same as well.
Is there any workaround on this?
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Title:
nested KVM fails - KVM: entry failed, hardware error 0x0
Changing the script to be used with xenial instead of trusty:
https://gist.github.com/kmindi/4fb1332509a39b6214b0e8b39611f5ad
I can also confirm the bug on the following hardware configuration:
CPU Model - Skylkake (Intel(R) Xeon(R) Gold 5115 CPU @ 2.40GHz)
L0 and L1:
Ubuntu 16.04.3 LTS
Kernel
The last time something like this was fixed was
https://bugs.launchpad.net/bugs/1329434. The fix was to disable APIC
virtualization in nested guests. Did it suddenly get turned on again?
Any patches we could test? Thanks.
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** Tags removed: kernel-da-key
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https://bugs.launchpad.net/bugs/1682077
Title:
nested KVM fails - KVM: entry failed, hardware error 0x0
Status in linux package in
Facing the same issue with KVM enabled L2 VM on following setup
CPU Model - Skylake-Client
L0:
Ubuntu 16.04.3 LTS
Kernel - 4.4.0-98-generic & 4.4.0-101-generic
libvirtd (libvirt) 2.5.0-3ubuntu5.5~cloud0
QEMU emulator version 2.8.0(Debian 1:2.8+dfsg-3ubuntu2.5~cloud0)
L1:
Ubuntu 16.04.3 LTS
Maybe IS happens to have a box that's not provisioned yet and you can
borrow? Or you can borrow that one for a bit if lgw01 has some spare
capacity? Or they'll upgrade to the current lts-xenial kernel so we
maybe get lucky. :)
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Stefan Bader and I have continued trying to reproduce this. Here's what
we've done:
- Tried to reproduce on various pieces of hardware available to us.
- Requested the hardware information about the host machine from IS and tested
on the most similar machine available to us (same generation Xeon
** Tags removed: kernel-key
** Tags added: kernel-da-key
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https://bugs.launchpad.net/bugs/1682077
Title:
nested KVM fails - KVM: entry failed, hardware error 0x0
Status
Adding some miscellaneous data points.
I'm still unable to reproduce this outside of a lgw01 compute node that
Laney set up for me, running xenial with qemu 1:2.5+dfsg-5ubuntu10.10
and linux 4.4.0-72. It doesn't happen on every host. I'm still
experimenting to see if I can reproduce this on some
For me it's enough to boot an instance on an affected lgw01 compute
node, install qemu-system-x86, download a cloud image and run "/usr/bin
/qemu-system-x86_64 -smp 1 -net none -m 512M -nographic -drive
format=raw,cache=unsafe,file=zesty-server-cloudimg-amd64.img -machine
accel=kvm -enable-kvm
** Changed in: linux-lts-xenial (Ubuntu)
Importance: Undecided => High
** Also affects: linux (Ubuntu)
Importance: Undecided
Status: New
** Changed in: linux (Ubuntu)
Status: New => Confirmed
** Changed in: linux (Ubuntu)
Importance: Undecided => High
** Tags added:
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