Re: [Xen-devel] NFS related netback hang

[Wei Liu <wei.liu2@xxxxxxxxxx>]

On Thu, Apr 11, 2013 at 02:55:48PM +0100, G.R. wrote:
> Hi,
> I'm suffering from strange NFS related network issue for a while.
> 
> The issue shows up when copying from dom0 to domU through a NFS mount.
> After a short while, the transfer suddenly freezes and the domU
> network simply stops any response. Force mounting the NFS mount
> generally resolves the freeze. But some times you can really be in
> bad luck that the trick does not work.
> 
> Lucky enough, I captured the following log in a recent instance. It
> appears to be a dead-lock when the netback tries to get some free
> pages from NFS. I'm not sure if this is the whole story. Any
> suggestion how to solve the issue?
> 

Ian, does this look familiar to you? IIRC you once discovered some NFS
bug related to SKB life cycle tracking.


Wei.


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