Re: NFSv3/NFSv4 problem.

["J. Bruce Fields" <bfields@fieldses.org>]

On Tue, Mar 02, 2010 at 07:05:08PM +0100, Anton Starikov wrote:
> 
> On Mar 2, 2010, at 6:52 PM, J. Bruce Fields wrote:
> 
> >> 
> >>> That's pretty old kernel; I'd file a bug with CentOS.
> >> 
> >> Unfortunately, with newer kernels this setup is even more problematic. :)
> > 
> > Any details?
> > 
> > As a rule, this list is probably going to be a better place to handle
> > bugs with the latest upstream kernels, and your distributor is more
> > likely to be useful for their kernels.
> 

> I submitted that to this list about year ago. It seems that one of the
> biggest issues that with NFS3 root, and NFS4 /home idmapd get
> deadlocked. To resolve NFS4 credentials it need to access NFS3. which
> is blocked by waiting final of NFS4 operation. I tried to move a lot
> of stuff to tmpfs, but it didn't resolve situation, if root still
> NFS3.

Do you have a pointer to the previous discussion?

--b.

> 
> My general observation is that there is trend: newer kernel, faster
> you get deadlock with this setup :)
> 
> Anton.
> 
> 
> 
>