NFS hangs on 5.3-RELEASE-p5

Simonas Kareiva simonas.kareiva at
Tue Feb 15 12:23:13 GMT 2005

Good evening,

We have a problematic FreeBSD box, which acts as nfs server and runs
5.3-RELEASE-p5 on an i386 AMD Athlon 64 3000+ (in a 32-bit mode). The
purpose of the box is to supply another FreeBSD (5.2.1-RC) ftp server
with more disk space. As of -p5, we have src/usr.sbin/nfsd/nfsd.c,v
1.30 2004/08/07 04:27:52. Average system load is about 2,5.

The problem is, that the nfs server hangs after running for a while,
like, 20 minutes. Any file operations (at the nfs mount points and
below) hang on the ftp server too, making it inaccessible. The nfsd
processes on the nfs server do not respond to any signals sent by
`kill`, so only a reboot of the system is a temporary solution. We
have ACPI enabled, NMBCLUSTERS set to 65535, SMP, debug.mpsafenet=0
and also some kern.ipc.* customizations which, as we assume, do not
affect the behavior of nfsd. Everything is served via 3COM 3C940
single port, 1000baseT adapter (device sk). The whole dmesg is
available at

Some file operations on the nfs server cause system panic. I didn't
debug anything, because I do not have much experience in it, but I
could try to do it by a request from anyone, who is willing to help.
The strace utility shows that no system calls are performed by any of
nfsd processes while they are inoperative.

Any help or comments would be appreciated. Thanks in advance.

 Simonas Kareiva

More information about the freebsd-questions mailing list