Re: NFS4 in combination with root over NFS3, hangs and dedlocks

Anton Starikov
2010-03-30T18:30:51Z

If it is already resolved problem, can someone point me into direction of particular patch?

Anton.

On Mar 29, 2010, at 5:14 PM, Anton Starikov wrote:

> Hi,
>
> Early (year ago and recently) I reported about my faults in getting working NFS4 mounts (primary automounting /home) with system booted with NFSv3-root. It always used to silently hang nodes with zero output in the logs. It was definitely client issue (I tried it with different versions of linux and solaris servers)
>
> Although I can't get simple and reproducible test-case, because hangs appears randomly, it can happen in 1hour, it can happen in 5 days, but it always will happen after some time. But this time I got some some improvement.
>
> With 2.6.32.9-70.fc12.x86_64 kernel and fresh nfs-utils from Fedora-12, after NFS4 mounts hangs, NFS3 mounts and node itself still continue to work, which gives chance to investigate problem.
>
> Can you give me instruction how to collect all necessary information to figure out where the bug is?
>
> As starting point I will attach output of echo "t" > sysrq-trigge, list of NFS mounts.
>
> Thanks,
> Anton.
>
> # cat /proc/mounts | grep nfs
> 172.19.8.1:/export/share/cluster/fedora-root / nfs ro,relatime,vers=3,rsize=32768,wsize=32768,namlen=255,hard,nolock,proto=udp,port=65535,timeo=7,retrans=3,sec=sys,mountport=65535,addr=172.19.8.1 0 0
> none /var/lib/nfs tmpfs rw,relatime 0 0
> sunrpc /var/lib/nfs/rpc_pipefs rpc_pipefs rw,relatime 0 0
> 172.19.8.1:/export/share/cluster/admin /root nfs rw,noatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,nolock,noacl,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=172.19.8.1,mountvers=3,mountport=44114,mountproto=tcp,addr=172.19.8.1 0 0
> 172.19.8.1:/export/share/cluster/checkpoint /mnt/checkpoint nfs rw,noatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,noacl,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=172.19.8.1,mountvers=3,mountport=52574,mountproto=udp,addr=172.19.8.1 0 0
> 172.19.8.1:/export/share/software /software nfs rw,noatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,nolock,noacl,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=172.19.8.1,mountvers=3,mountport=44114,mountproto=tcp,addr=172.19.8.1 0 0
> 172.19.8.1:/export/share/cluster/torque /var/torque nfs rw,noatime,vers=3,rsize=1048576,wsize=1048576,namlen=255,hard,nolock,noacl,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=172.19.8.1,mountvers=3,mountport=44114,mountproto=tcp,addr=172.19.8.1 0 0
> 172.19.8.1:/export/share/common/ /common nfs4 rw,noatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=172.19.8.133,addr=172.19.8.1 0 0
> 172.19.8.1:/export/home/alfons/ /home/alfons nfs4 rw,relatime,vers=4,rsize=1048576,wsize=1048576,namlen=255,hard,proto=tcp,port=0,timeo=600,retrans=2,sec=sys,clientaddr=172.19.8.133,addr=172.19.8.1 0 0
>
> <log1.txt.gz>
>