Copying file from remote NFS share results in a lock up.

quag7

The system locks up when I am trying to copy a file from a mounted NFS share to a local directory. CTRL-C will not abort the copy command, even if intr is set as a mount option. In addition, the shutdown sequence hangs because it complains that it can't unmount the network file systems. I can succesfully mount remote NFS shares. I can successfully traverse directories without a problem. The problem is when I go to copy a file from a mounted NFS share to a local directory. Note that these exported shares are also exported to other machines, and they work fine on those other machines. These other machines are also running Gentoo Linux.

I also can export from the local system, and mount and use these shares from remote machines without a problem, including copying files. The problem is limited to using this system as a client.

System Config
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Hardware: IBM Thinkpad 600E (Client machine)
Distrib : Gentoo Linux 1.4 rc 4
Portmap : 5b-r6 (?) - Recent.
NFS : 1.0.3
Mount : 2.11y

Kernel Modules / Options
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NFS file system support
Provide NFSv3 client support
NFS server support
Provide NFSv3 server support

Other information
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Remote systems housing exported shares:

macquarie:
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/mnt/public antarctica(rw,no_root_squash,sync) amundsen(rw,no_root_squash,sync) shackleton(rw,no_root_squash,sync)

antarctica:
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/mnt/priv amundsen(rw,sync) shackleton(rw,sync)

Local (client) system having the problem has hostname shackleton

Portmap is running
nfsd is running
rpc.mountd is running

syslog and messages don't have anything useful.
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RedBeard0531 · Guru Joined: 21 Sep 2002 Posts: 415 Location: maryland

I have the same problem, were you able to fix it?
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quag7 · Posted: Thu Jun 19, 2003 4:46 am Post subject:

Yes, but unfortunately it was one of those situations where I don't know what I did. I compiled a fresh kernel. Might have missed a module, or had a module which was causing problems. I have it working now but unfortunately dont have the old config to compare.
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RedBeard0531 · Guru Joined: 21 Sep 2002 Posts: 415 Location: maryland

Did you have to use any special mount options. I remember reading somewhere about that.
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quag7 · Posted: Fri Jun 20, 2003 2:45 pm Post subject:

No. Eventually I wound up just using defaults, and it worked perfectly. I did try just about everything under the sun.
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Robelix · Posted: Sun Mar 28, 2004 9:40 pm Post subject:

I just had something similar: Copying large files to the NFS volume stopped after about 80MB. The copy process was in Status D, so not even a clean shutdown was possible. When doing a /etc/init.d/nfs restart on the server the copy went on for another 80MB and stopped again.
The crazy thing was: Other machines had no problems accessing the same share, and the same box had no problems with other shares from the same server

Searching here and on google I found a lot of tips, but nothing that helped.
I tried sync/async, nfs v2 and 3, a bunch of mount options, built new kernels on client and server...
The only thing that helped was decreasing rsize and wsize to 2048, but this resulted in a very poor performance.

So finally - just before going crazy - I remerged util-linux nfs-utils and portmap on client and server - and it works again ?!?

Robelix
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