[Qemu-devel] [Bug 816860] [NEW] Guest machine freezes when NFS mount goes offline

[Qemu-devel] [Bug 816860] [NEW] Guest machine freezes when NFS mount goes offline

[Igor Blanco]

Public bug reported:

I have a virtual KVM machine that has 2 CDROM units with ISOs mounted
from a NFS mount point. When NFS server goes offline the virtual machine
blocks completely instead of throwing read errors for the CDROM device.

Host: Proxmox VE 1.8-11 (Debian GNU/Linux 5.0)
KVM commandline version: QEMU emulator version 0.14.1 (qemu-kvm-devel)
Guest: Windows 7 professional SP 1

** Affects: qemu
     Importance: Undecided
         Status: New

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Title:
  Guest machine freezes when NFS mount goes offline

Status in QEMU:
  New

Bug description:
  I have a virtual KVM machine that has 2 CDROM units with ISOs mounted
  from a NFS mount point. When NFS server goes offline the virtual
  machine blocks completely instead of throwing read errors for the
  CDROM device.

  Host: Proxmox VE 1.8-11 (Debian GNU/Linux 5.0)
  KVM commandline version: QEMU emulator version 0.14.1 (qemu-kvm-devel)
  Guest: Windows 7 professional SP 1

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Re: [Qemu-devel] [Bug 816860] [NEW] Guest machine freezes when NFS mount goes offline

[Stefan Hajnoczi]

On Wed, Jul 27, 2011 at 10:09 AM, Igor Blanco <816860@bugs.launchpad.net> wrote:
> Public bug reported:
>
> I have a virtual KVM machine that has 2 CDROM units with ISOs mounted
> from a NFS mount point. When NFS server goes offline the virtual machine
> blocks completely instead of throwing read errors for the CDROM device.
>
> Host: Proxmox VE 1.8-11 (Debian GNU/Linux 5.0)
> KVM commandline version: QEMU emulator version 0.14.1 (qemu-kvm-devel)
> Guest: Windows 7 professional SP 1

Thanks for reporting this.  There are instances where QEMU performs
blocking operations in a thread that will prevent the guest from
running.  I suspect you are hitting this case and refactoring work
needs to be done to ensure that QEMU threads never block.

Stefan

[Qemu-devel] [Bug 816860] Re: Guest machine freezes when NFS mount goes offline

[Stefan Hajnoczi]

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

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Title:
  Guest machine freezes when NFS mount goes offline

Status in QEMU:
  Confirmed

Bug description:
  I have a virtual KVM machine that has 2 CDROM units with ISOs mounted
  from a NFS mount point. When NFS server goes offline the virtual
  machine blocks completely instead of throwing read errors for the
  CDROM device.

  Host: Proxmox VE 1.8-11 (Debian GNU/Linux 5.0)
  KVM commandline version: QEMU emulator version 0.14.1 (qemu-kvm-devel)
  Guest: Windows 7 professional SP 1

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[Qemu-devel] [Bug 816860] Re: Guest machine freezes when NFS mount goes offline

[Thomas Huth]

Can you still reproduce this problem with the latest version of QEMU
(currently version 2.9.0)?

** Changed in: qemu
       Status: Confirmed => Incomplete

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https://bugs.launchpad.net/bugs/816860

Title:
  Guest machine freezes when NFS mount goes offline

Status in QEMU:
  Incomplete

Bug description:
  I have a virtual KVM machine that has 2 CDROM units with ISOs mounted
  from a NFS mount point. When NFS server goes offline the virtual
  machine blocks completely instead of throwing read errors for the
  CDROM device.

  Host: Proxmox VE 1.8-11 (Debian GNU/Linux 5.0)
  KVM commandline version: QEMU emulator version 0.14.1 (qemu-kvm-devel)
  Guest: Windows 7 professional SP 1

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[Qemu-devel] [Bug 816860] Re: Guest machine freezes when NFS mount goes offline

[Launchpad Bug Tracker]

[Expired for QEMU because there has been no activity for 60 days.]

** Changed in: qemu
       Status: Incomplete => Expired

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https://bugs.launchpad.net/bugs/816860

Title:
  Guest machine freezes when NFS mount goes offline

Status in QEMU:
  Expired

Bug description:
  I have a virtual KVM machine that has 2 CDROM units with ISOs mounted
  from a NFS mount point. When NFS server goes offline the virtual
  machine blocks completely instead of throwing read errors for the
  CDROM device.

  Host: Proxmox VE 1.8-11 (Debian GNU/Linux 5.0)
  KVM commandline version: QEMU emulator version 0.14.1 (qemu-kvm-devel)
  Guest: Windows 7 professional SP 1

To manage notifications about this bug go to:
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