[Bug 882579] Re: Some Commands return: "Timed out during operation: cannot acquire state change lock"

[nutznboltz]

** Changed in: libvirt (Ubuntu)
       Status: Incomplete => Confirmed

** Description changed:

+ To reproduce:
+ 
+ apt-get source linux-image-2.6.38-12-generic
+ 
+ examine linux-lts-backport-natty-2.6.38/arch/x86/kvm/x86.c
+ 
+ See missing patch:
+ 
+ diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
+ index 980317a..0556e05 100644
+ --- a/arch/x86/kvm/x86.c
+ +++ b/arch/x86/kvm/x86.c
+ @@ -2100,8 +2100,8 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
+    if (check_tsc_unstable()) {
+     kvm_x86_ops->adjust_tsc_offset(vcpu, -tsc_delta);
+     vcpu->arch.tsc_catchup = 1;
+ - kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
+    }
+ + kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
+    if (vcpu->cpu != cpu)
+     kvm_migrate_timers(vcpu);
+    vcpu->cpu = cpu;
+ 
+ =====
+ 
  While attempting to use "virsh" commands this error occurs:
  
  Oct 27 08:52:22 boron libvirtd: 08:52:23.000: 25851: error :
  qemuDomainObjBeginJobWithDriver:453 : Timed out during operation: cannot
  acquire state change lock
  
  While the error state is present certain commands like "virsh shutdown"
  and "virsh destroy" elicit that error message and fail to work
  completely I found that if I kill the kvm guest processes
  
  $ kill -9 $(ps ax | grep '/usr/bin/kvm.*guestname' | awk '{print $1}')
  
  Then "virsh start guestname" would work.
  
  I'm not certain that the number of VM guests is the issue, however, this
  happens more frequently to me on systems with larger numbers of guests.
  We have one with 14 guests and another with 53.
  
- There seems to be a corresponding Red Hat bug at: 
+ There seems to be a corresponding Red Hat bug at:
  https://bugzilla.redhat.com/show_bug.cgi?id=676205
  
  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: libvirt-bin 0.8.8-1ubuntu6.5
  ProcVersionSignature: Ubuntu 2.6.38-12.51-generic 2.6.38.8
  Uname: Linux 2.6.38-12-generic x86_64
  Architecture: amd64
  Date: Thu Oct 27 09:41:23 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcEnviron:
-  LANGUAGE=en_US:en
-  PATH=(custom, user)
-  LANG=en_US.UTF-8
-  SHELL=/bin/bash
+  LANGUAGE=en_US:en
+  PATH=(custom, user)
+  LANG=en_US.UTF-8
+  SHELL=/bin/bash
  SourcePackage: libvirt
  UpgradeStatus: Upgraded to natty on 2011-05-26 (153 days ago)

** Description changed:

  To reproduce:
  
+ On Lucid run:
  apt-get source linux-image-2.6.38-12-generic
  
  examine linux-lts-backport-natty-2.6.38/arch/x86/kvm/x86.c
  
  See missing patch:
  
  diff --git a/arch/x86/kvm/x86.c b/arch/x86/kvm/x86.c
  index 980317a..0556e05 100644
  --- a/arch/x86/kvm/x86.c
  +++ b/arch/x86/kvm/x86.c
  @@ -2100,8 +2100,8 @@ void kvm_arch_vcpu_load(struct kvm_vcpu *vcpu, int cpu)
-    if (check_tsc_unstable()) {
-     kvm_x86_ops->adjust_tsc_offset(vcpu, -tsc_delta);
-     vcpu->arch.tsc_catchup = 1;
+    if (check_tsc_unstable()) {
+     kvm_x86_ops->adjust_tsc_offset(vcpu, -tsc_delta);
+     vcpu->arch.tsc_catchup = 1;
  - kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
-    }
+    }
  + kvm_make_request(KVM_REQ_CLOCK_UPDATE, vcpu);
-    if (vcpu->cpu != cpu)
-     kvm_migrate_timers(vcpu);
-    vcpu->cpu = cpu;
+    if (vcpu->cpu != cpu)
+     kvm_migrate_timers(vcpu);
+    vcpu->cpu = cpu;
  
  =====
  
  While attempting to use "virsh" commands this error occurs:
  
  Oct 27 08:52:22 boron libvirtd: 08:52:23.000: 25851: error :
  qemuDomainObjBeginJobWithDriver:453 : Timed out during operation: cannot
  acquire state change lock
  
  While the error state is present certain commands like "virsh shutdown"
  and "virsh destroy" elicit that error message and fail to work
  completely I found that if I kill the kvm guest processes
  
  $ kill -9 $(ps ax | grep '/usr/bin/kvm.*guestname' | awk '{print $1}')
  
  Then "virsh start guestname" would work.
  
  I'm not certain that the number of VM guests is the issue, however, this
  happens more frequently to me on systems with larger numbers of guests.
  We have one with 14 guests and another with 53.
  
  There seems to be a corresponding Red Hat bug at:
  https://bugzilla.redhat.com/show_bug.cgi?id=676205
  
  ProblemType: Bug
  DistroRelease: Ubuntu 11.04
  Package: libvirt-bin 0.8.8-1ubuntu6.5
  ProcVersionSignature: Ubuntu 2.6.38-12.51-generic 2.6.38.8
  Uname: Linux 2.6.38-12-generic x86_64
  Architecture: amd64
  Date: Thu Oct 27 09:41:23 2011
  InstallationMedia: Ubuntu 10.10 "Maverick Meerkat" - Release amd64 (20101007)
  ProcEnviron:
   LANGUAGE=en_US:en
   PATH=(custom, user)
   LANG=en_US.UTF-8
   SHELL=/bin/bash
  SourcePackage: libvirt
  UpgradeStatus: Upgraded to natty on 2011-05-26 (153 days ago)

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https://bugs.launchpad.net/bugs/882579

Title:
  Some Commands return: "Timed out during operation: cannot acquire
  state change lock"

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