VM Guests Hang While Rebooting Due to KVM Clock Bug
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
Confirmed
|
Undecided
|
Unassigned |
Bug Description
SRU Justification:
Impact: Various Qemu/KVM guests hang while attempting to reboot due to a missing kvm clock kernel patch.
Testcase: Some guests are more susceptible to this issue. A 32-bit RHEL-5 (or compatible) 2-CPU VM guest hangs 100% of the time (fully reproducible.) I have personally seen Ubuntu VM guests hang too but this is much harder to reproduce.
Fix: A one line patch from 2.6.39
diff --git a/arch/
index 980317a..0556e05 100644
--- a/arch/
+++ b/arch/
@@ -2100,8 +2100,8 @@ void kvm_arch_
if (check_
kvm_
vcpu-
- kvm_make_
}
+ kvm_make_
if (vcpu->cpu != cpu)
kvm_
vcpu->cpu = cpu;
This is a resubmission of LP: #795717
See also http://
See also LP: #882579
ProblemType: Bug
DistroRelease: Ubuntu 11.04
Package: linux-image-
ProcVersionSign
Uname: Linux 2.6.38-12-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.23.
Architecture: amd64
ArecordDevices:
**** List of CAPTURE Hardware Devices ****
card 0: SB [HDA ATI SB], device 0: ALC892 Analog [ALC892 Analog]
Subdevices: 1/1
Subdevice #0: subdevice #0
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfe4f4000 irq 16'
Mixer name : 'Realtek ALC892'
Components : 'HDA:10ec0892,
Controls : 32
Simple ctrls : 18
Card1.Amixer.info:
Card hw:1 'HDMI'/'HDA ATI HDMI at 0xfe6e8000 irq 19'
Mixer name : 'ATI RS690/780 HDMI'
Components : 'HDA:1002791a,
Controls : 4
Simple ctrls : 1
Card1.Amixer.
Simple mixer control 'IEC958',0
Capabilities: pswitch pswitch-joined penum
Playback channels: Mono
Mono: Playback [on]
Date: Wed Nov 2 07:54:16 2011
HibernationDevice: RESUME=
InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
IwConfig:
lo no wireless extensions.
eth0 no wireless extensions.
virbr0 no wireless extensions.
MachineType: System manufacturer System Product Name
ProcEnviron:
LANGUAGE=en_US:en
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
ProcKernelCmdLine: BOOT_IMAGE=
RelatedPackageV
linux-
linux-
linux-firmware 1.52
RfKill:
SourcePackage: linux
UpgradeStatus: Upgraded to natty on 2011-05-26 (159 days ago)
dmi.bios.date: 08/24/2010
dmi.bios.vendor: American Megatrends Inc.
dmi.bios.version: 1606
dmi.board.
dmi.board.name: M4A89GTD-PRO/USB3
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: Rev 1.xx
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.
dmi.modalias: dmi:bvnAmerican
dmi.product.name: System Product Name
dmi.product.
dmi.sys.vendor: System manufacturer
Changed in linux (Ubuntu): | |
status: | New → Confirmed |
description: | updated |
description: | updated |
@nutznboltz: I'm including the patch again into natty, and probably we will have a new kernel for you to verify next week. I'm marking this bug as duplicate of the original one (bug 795717). Make sure you follow that bug, a new request for verification will be made there. Once the kernel with the fix is in -proposed, I'll send again a message on that bug requesting the kernel to be verified (tested) to fix the problem. If it's not tested, the patch will be reverted again.