XFS corruption with power failure

[John Quigley]

Christoph Hellwig wrote:
> On Wed, Aug 26, 2009 at 12:54:56PM -0500, John Quigley wrote:
>> John Quigley wrote:
>>> John Quigley wrote:
>>>> We've distilled this into a reproducible environment with a stack of  
>>>> NFS + XFS to a local disk + automated sysrq 'b' reboots.  We're  
>>>> working on getting this bundled up into a nice little package as a  
>>>> VirtualBox vm for your consumption.  Please tell me if this is not  
>>>> desirable.
>>> The self-contained and reproducible environment can be downloaded from  
>>> the following location:
>>>
>>>  http://www.jquigley.com/tmp/xfsVM.tar.bz2
>> Has anyone by chance had an opportunity to utilize this?  Any corruption reports?
> 
> Looked at it, but it turns virtualbox is a real big pile of junk
> including it's own huge kernel module.  Qemu/kvm now has support for the
> virtualbox disk images and I will give it a try next.

Ping ... sorry to be a bother.  I've finally gotten some time allocated 
to look at this at the code level, but I'm unfamiliar with the XFS 
implementation, and I believe this problem arises as an interaction 
between XFS and NFS, which causes me heartburn.  I'll report here if I 
discover anything meaningful.

- John Quigley