Path: utzoo!utgpu!watserv1!watmath!att!tut.cis.ohio-state.edu!nisca.ircc.ohio-state.edu!zaphod.mps.ohio-state.edu!rpi!uupsi!sunic!chalmers!mathrt0.math.chalmers.se!ncar.ucar.edu!era
From: era@ncar.ucar.edu (Ed Arnold)
Newsgroups: comp.sys.sun
Subject: 4.0.3 NFS lockup: summary
Message-ID: <1990Sep10.195944.22308@mathrt0.math.chalmers.se>
Date: 10 Sep 90 19:59:44 GMT
Sender: daemon@mathrt0.math.chalmers.se (The devil himself)
Reply-To: era@ncar.ucar.edu (Ed Arnold)
Organization: Nat'l Center for Atmospheric Research (NCAR); Boulder, CO
Lines: 11
Approved: recnews

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).

era@ncar.ucar.edu