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NFS lockups/hangs on RHEL64 U4 ?

DISCUSSION gb 1 participant 1 message Jan 24, 2005

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All,

Apologies in advance if this forward is viewed as uncouth; I wanted to ask the folks here if they have had any experience, or have seen the NFS problem described below (well, linked to below may be a better explanation...)

The showTasks output lists multiple deadlocked tasks with a Call Trace in the following condition:

(from the sif029.strings included on the Bugzilla
page)

Call Trace:

[<ffffffffa00c6024>]{:nfs:nfs_complete_unlink+308}

Call Trace: [<ffffffffa00d39c0>]{:nfs:nfs_sops+0}

[<ffffffffa00d3d00>]{:nfs:nfs_fs_type+0}

Ideas? Suggestions? I've also opened a ticket with internal Redhat support to see if they have any hypothesis.

Thanks,

--Greg

Quoted 1 line

https://bugzilla.redhat.com/bugzilla/show_bug.cgi?id=145550

Quoted 41 lines

Summary: NFS lockups/hangs on RHEL3
x86_64 U4
Product: Red Hat Enterprise Linux
Version: 3
Platform: x86_64
OS/Version: Linux

Description of problem:

We have a group of 10 systems to distribute builds (gcc). When these
systems are under heavy load, the builds (make process) hang in a
blocked, deadlocked state.

The NFS servers do not show excessive load or any
problems.

NFS gcc source: NetApp Release 6.4.5P2
NFS build source: NetApp Release 6.5.2R1P9:

The 10 build clients are exactly the same hardware and configuration.
I'll be attaching the following from a system that
is exhibiting this
behavior:

# lspci -vv
# lsmod
# cat /proc/meminfo
# cat /proc/cpuinfo
# uname -a

And as much as I can capture from the console as
possible.

Unfortunately, we cannot recreate the hang
on-demand.

Quoted 8 lines

Please let me know if there is any other information I can provide
that would be helpful.

Version-Release number of selected component (if
applicable):

Redhat Enterprise Linux 3 Update 4 x86_64

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