RE: Empty core dumps on NFSv4 mounts

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> -----Original Message-----
> From: Chuck Lever [mailto:chuck.lever@xxxxxxxxxx]
> Sent: Monday, December 05, 2011 3:19 PM
> To: Myklebust, Trond
> Cc: Linux NFS Mailing List
> Subject: Re: Empty core dumps on NFSv4 mounts
> 
> 
> On Dec 5, 2011, at 3:14 PM, Myklebust, Trond wrote:
> 
> > No. There have been no kernel idmapper changes since then.
> >
> > The correct thing to do here is to cache the string name in struct
> > nfs_fattr, and then do the upcall from the caller of OPEN. I believe
> > that Arnaud wrote a patch to do this, however the whole pNFS merge
got
> > in my way of reviewing this. Feel free to take a look at what he
did,
> > and post comments...
> 
> We're looking at his patch, from July 2010, now.  It calls kmalloc()
in the XDR
> decoder.  Is there a newer version?

Not as far as I know, and I agree that calling kmalloc in the XDR is a
problem... If, however, we can accept that it will occasionally fail,
then perhaps kmalloc(GFP_NOWAIT) might be acceptable?

Cheers
  Trond

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