Subject: poor nfs error recovery
To: None <firstname.lastname@example.org>
From: Robert Dobbs <email@example.com>
Date: 12/13/1994 19:39:44
I have an i386 machine with an old 8 bit 3c503 card; this card is lame
enough that it produces a handful of "ring buffer overruns" under heavy
network load. This machine both serves and clients NFS. Due (I presume)
to the ethernet card, access (read/write) of file larger than ~6K hangs.
(5.8K works, 6.2K fails).
This problem of hanging really sucked before I loaded the mount_nfs with
-disR5 so I can ^C out and hung calls.
I plan to trigger the kernel debugger on this machine to determine where
the process is hanging. I plan to examine the nfs code to see what might
be magic about 6K. Has anyone else seen this sort of problem or have
experience with nfs hangs/old evil ethernet cards.