On Sun, Jun 25, 2006 at 09:49:30AM +0000, Philippe CASIDY wrote: > David O'Brien wrote: > >I am getting these errors all the time now (now being -CURRENT newer than > >Dec'05-Jan'06 time frame). Are there some known issues in UDP or NFS > >serving since then? This is on a virtually zero loaded 100Mbit network. > >Both the NFS server and client are FreeBSD-CURRENT systems. > > > >I can trivially trigger this on all my FreeBSD-CURRENT NFS clients, > >simply by exiting Vim. Did something change sometime in 2006 that would > >affect the default NFS mounts? > > > > I experience this problem from now and then too. > The problem was gone when I upgraded my server to from 5.1 to > 5.5-PRELEASE. Before that, I added an entry in the server's crontab to > launch a script that does : > > #!/bin/sh > /sbin/ifconfig re0 mtu 1490 > /bin/sleep 15 > /sbin/ifconfig re0 mtu 1500 > > I had then bad network performances but no more NFS lockdown. This is likely a different story - re chips have broken hardware checksum offloading. All retransmission get the same defect until you force a different pattern with the MTU change. The feature was turned off by default later. -- B.Walter http://www.bwct.de http://www.fizon.de bernd_at_bwct.de info_at_bwct.de support_at_fizon.deReceived on Sun Jun 25 2006 - 07:23:41 UTC
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