RE: [Xen-devel] copying large files over NFS locks up machine on-testing from Thursday

["Ian Pratt" <m+Ian.Pratt@xxxxxxxxxxxx>]

> If it happens on -unstable in domUs (it probably does) I can 
> grab a coredump or attach to it while it is running and see 
> where it is wedged. I don't have a port master where I'm at 
> so I can't use pdb or cdb.

It's also worth giving it a prod with 'xm sysrq' to see what's going on.
Also knowing whether its busy looping or blocked can be useful.

Ian
 
> On 5/21/05, Chris Wright <chrisw@xxxxxxxx> wrote:
> > * Kip Macy (kip.macy@xxxxxxxxx) wrote:
> > > I've locked up my dom0 a couple of times this morning 
> copying a 3GB 
> > > file from local disk to an NFS mount(neither xend nor 
> guests running).
> > > I don't encounter this problem on the stock CentOS 4 kernel. The 
> > > machine is a PowerEdge 2850 with 2 e1000 cards - the one 
> in use is 
> > > connected to a PowerConnect 2216 10/100 switch and has negotiated 
> > > 100Mbit. I'll check if the stock Cambridge isn't negotiating full 
> > > duplex but that shouldn't cause lockups.
> > >
> > > My mount options are:
> > > defaults,intr,rsize=32768,wsize=32768,nfsvers=3,tcp,timeo=600
> > 
> > Hmm, I've seen this on stock 2.6.11 kernels as well (no xen).  Any 
> > chance you can get useful debugging out it?
> > 
> > thanks,
> > -chris
> >
> 
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