[Qemu-devel] [Bug 789831] [NEW] kvm locks up when out of disk space

[Qemu-devel] [Bug 789831] [NEW] kvm locks up when out of disk space

[Michal Suchanek]

Public bug reported:

Running a VM using raw sparse disk image on kvm 0.14 on Debian.

When disk writes use up all disk space kvm locks up.

if it cannot handle this situation gracefully (eg suspend the VM until
space becomes available) it should at the very least report an error and
exit, not keep sitting there.

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  kvm locks up when out of disk space

Status in QEMU:
  New

Bug description:
  Running a VM using raw sparse disk image on kvm 0.14 on Debian.

  When disk writes use up all disk space kvm locks up.

  if it cannot handle this situation gracefully (eg suspend the VM until
  space becomes available) it should at the very least report an error
  and exit, not keep sitting there.

[Qemu-devel] [Bug 789831] Re: kvm locks up when out of disk space

[Michael Tokarev]

I already replied to the OP in the Debian bug tracking system, and
closed his bug there, see http://bugs.debian.org/628152 .

** Bug watch added: Debian Bug tracker #628152
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628152

** Also affects: qemu-kvm (Debian) via
   http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=628152
   Importance: Unknown
       Status: Unknown

** Changed in: qemu
       Status: New => Invalid

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https://bugs.launchpad.net/bugs/789831

Title:
  kvm locks up when out of disk space

Status in QEMU:
  Invalid
Status in “qemu-kvm” package in Debian:
  Unknown

Bug description:
  Running a VM using raw sparse disk image on kvm 0.14 on Debian.

  When disk writes use up all disk space kvm locks up.

  if it cannot handle this situation gracefully (eg suspend the VM until
  space becomes available) it should at the very least report an error
  and exit, not keep sitting there.

Re: [Qemu-devel] [Bug 789831] [NEW] kvm locks up when out of disk space

[Stefan Hajnoczi]

On Sun, May 29, 2011 at 11:48 AM, Michal Suchanek <hramrach@centrum.cz> wrote:
> Public bug reported:
>
> Running a VM using raw sparse disk image on kvm 0.14 on Debian.
>
> When disk writes use up all disk space kvm locks up.
>
> if it cannot handle this situation gracefully (eg suspend the VM until
> space becomes available) it should at the very least report an error and
> exit, not keep sitting there.

Actually it should pause the VM - are you sure that KVM is "locking
up"?  If you run with SDL the window title says "[Stopped]" and you
can resume the VM with the "c" (continue) QEMU monitor command once
you've rectified the storage shortage.

Are you using libvirt (virsh/virt-manager)?

What makes you think that KVM is locked up?

How much CPU is the qemu-kvm process consuming?

Stefan

Re: [Qemu-devel] [Bug 789831] [NEW] kvm locks up when out of disk space

[Michal Suchanek]

On 29 May 2011 13:33, Stefan Hajnoczi <stefanha@gmail.com> wrote:
> On Sun, May 29, 2011 at 11:48 AM, Michal Suchanek <hramrach@centrum.cz> wrote:
>> Public bug reported:
>>
>> Running a VM using raw sparse disk image on kvm 0.14 on Debian.
>>
>> When disk writes use up all disk space kvm locks up.
>>
>> if it cannot handle this situation gracefully (eg suspend the VM until
>> space becomes available) it should at the very least report an error and
>> exit, not keep sitting there.
>
> Actually it should pause the VM - are you sure that KVM is "locking
> up"?  If you run with SDL the window title says "[Stopped]" and you

Unfortunately, the window title is not visible at all times so even if
it says [Stopped] it is not useful indication of the VM state.

> can resume the VM with the "c" (continue) QEMU monitor command once
> you've rectified the storage shortage.
>
> Are you using libvirt (virsh/virt-manager)?

No.

>
> What makes you think that KVM is locked up?

Nothing apparent happens. eg. the VM mouse cursor does not move, no
messages printed in the terminal from which kvm was started.

>
> How much CPU is the qemu-kvm process consuming?

Did not check.

Thanks

Michal

[Qemu-devel] [Bug 789831] Re: kvm locks up when out of disk space

[Bug Watch Updater]

** Changed in: qemu-kvm (Debian)
       Status: Unknown => Fix Released

-- 
You received this bug notification because you are a member of qemu-
devel-ml, which is subscribed to QEMU.
https://bugs.launchpad.net/bugs/789831

Title:
  kvm locks up when out of disk space

Status in QEMU:
  Invalid
Status in “qemu-kvm” package in Debian:
  Fix Released

Bug description:
  Running a VM using raw sparse disk image on kvm 0.14 on Debian.

  When disk writes use up all disk space kvm locks up.

  if it cannot handle this situation gracefully (eg suspend the VM until
  space becomes available) it should at the very least report an error
  and exit, not keep sitting there.

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