Comment # 5 on bug 1032593 from Manish Patel

Hi Neil,

One more observation is that this only happens with NFS v3 and with NFS v4
hangs doesn't happens.

linux-otlh:~ # mount -t nfs -o vers=3 10.0.0.216:/root/test-nfs /mnt/nfs/
linux-otlh:~ # mount|egrep nfs
10.0.0.216:/root/test-nfs on /mnt/nfs type nfs
(rw,relatime,vers=3,rsize=524288,wsize=524288,namlen=255,hard,proto=tcp,timeo=600,retrans=2,sec=sys,mountaddr=10.0.0.216,mountvers=3,mountport=60245,mountproto=udp,local_lock=none,addr=10.0.0.216)
linux-otlh:~ #
linux-otlh:~ #
linux-otlh:~ # date
Sat May 20 17:27:38 EDT 2017
linux-otlh:~ # while sleep 302; do date; time df /mnt/nfs; date;done
Sat May 20 17:32:44 EDT 2017
Filesystem                1K-blocks    Used Available Use% Mounted on
10.0.0.216:/root/test-nfs   7061504 1963520   4732928  30% /mnt/nfs

real    0m21.054s
user    0m0.000s
sys     0m0.000s
Sat May 20 17:33:06 EDT 2017
Sat May 20 17:38:08 EDT 2017
Filesystem                1K-blocks    Used Available Use% Mounted on
10.0.0.216:/root/test-nfs   7061504 1963520   4732928  30% /mnt/nfs

real    1m33.164s
user    0m0.000s
sys     0m0.000s
Sat May 20 17:39:41 EDT 2017
Sat May 20 17:44:43 EDT 2017
Filesystem                1K-blocks    Used Available Use% Mounted on
10.0.0.216:/root/test-nfs   7061504 1963520   4732928  30% /mnt/nfs

real    1m33.132s
user    0m0.000s
sys     0m0.000s
Sat May 20 17:46:16 EDT 2017


Thank You,
         Manish