Re: NFSoRDMA not working with KVM when cache disabled

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On Fri, Aug 31, 2012 at 6:05 PM, Andrew Holway <a.holway@xxxxxxxxxxxx> wrote:
> I am trying to host KVM machines on an NFSoRDMA mount.
>
> This works:
>
> -drive file=/mnt/vm001.img,if=none,id=drive-virtio-disk0,format=raw -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0
>
> This Doesn't!
>
> -drive file=/mnt/vm001.img,if=none,id=drive-virtio-disk0,format=raw,cache=none -device virtio-blk-pci,scsi=off,bus=pci.0,addr=0x5,drive=drive-virtio-disk0,id=virtio-disk0,bootindex=2
>
> Any ideas why this could be?

-drive cache=none results in QEMU opening the image file with O_DIRECT.

It's not clear to me what the first error is.  The node-installer
output you have posted does not show a series of steps to reproduce
the problem.  Can you try running isolated tests with dd or
verify-data (http://people.redhat.com/sct/src/verify-data/)?

Have you tried running a different guest OS, say a Fedora or Debian Live CD?

Stefan
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