Bug#576405: linux-image-2.6.26: Deadlock during combined NFS3/NFS4 use

[Anton Ivanov <anton.ivanov@kot-begemot.co.uk>]

On 12/09/11 10:07, Jonathan Nieder wrote:
> Hi Anton,
>
> Anton Ivanov wrote:
>
>    
> > When an export is exported and mounted via autofs using BOTH
> > NFSv3 and NFSv4 the NFSv4 one deadlocks.
> >      
> We ought to have put this in the hands of upstream about a year ago.
> Better late than never, so I will echo Ben:
>
> Ben Hutchings wrote:
>
>    
> > OK.  Next, can you test whether the kernel version in unstable
> > (linux-image-2.6.32-4-* version 2.6.32-10) or testing
> > (linux-image-2.6.32-3-* version 2.6.32-9) also has this bug?
> >      

I cannot reproduce it on 2.6.32 with autofs5 (squeeze). You can close it.

In general 2.6.26/autofs4 (lenny) was quite fragile with automounted 
nfs4. nfs4 itself was OK, autofs itself was OK, together the combination 
was rather "explosive".

Squeeze fixed all of that. I have yet to observe a single problem with 
nfs4 + autofs on my squeeze systems.

> Can you reproduce this with a recent (3.x) kernel?  (If so, upstream
> might care, and if not, we can try to find the fix and backport it.)
>
> Thanks for an interesting report, and sorry to have left it hanging.
> Jonathan
>
>    


--
    Humans are allergic to change. They love to say, "We've always
done it this way." I try to fight that. That's why I have a clock
on my wall that runs counter-clockwise.   -- R.A. Grace Hopper

A. R. Ivanov
E-mail:  anton.ivanov@kot-begemot.co.uk