4.0.3 NFS lockup: summary

From: Ed Arnold (era@niwot.scd.ucar.edu)
Date: Mon Sep 10 1990 - 12:51:45 CDT

From: era@ncar.ucar.edu (Ed Arnold)
Path: ncar.ucar.edu!era
Newsgroups: comp.sys.sun
Subject: 4.0.3 NFS lockup: summary
Reply-To: era@ncar.ucar.edu (Ed Arnold)
Distribution: world
Organization: Nat'l Center for Atmospheric Research (NCAR); Boulder, CO

A while back, I posted an inquiry about lockup of the NFS daemons on
a 4/280 running 4.0.3. This lockup seemed to be provoked by an IBM RS/6000
that was writing into one of the 280's filesystems. The NFS Jumbo Patch
did not cure the problem.

I subsequently learned of a patch known as "nfs_dw", a changed ufs_bmap.o
module, which fixes a problem with nfsd hanging on a memory page
that never gets unlocked due to a bug. This information was provided
by Hal Stern of Sun (halstern@sun.com).


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