Date: Thu, 29 Jul 1999 19:22:23 -0400 (EDT) From: Bill Paul <wpaul@skynet.ctr.columbia.edu> To: dillon@apollo.backplane.com (Matthew Dillon) Cc: peter@netplex.com.au, crossd@cs.rpi.edu, current@FreeBSD.ORG Subject: Re: IRIX 6.5.4 NFS v3 TCP client + FreeBSD server = bewm Message-ID: <199907292322.TAA17429@skynet.ctr.columbia.edu> In-Reply-To: <199907292224.PAA79422@apollo.backplane.com> from "Matthew Dillon" at Jul 29, 99 03:24:34 pm
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Of all the gin joints in all the towns in all the world, Matthew Dillon
had to walk into mine and say:
> And here is something *really* scary. For the last month I've been
> running NFS over TCP without even realizing it. I had set up my
> machines to run NFS/TCP as a test instead of NFS/UDP and then forgot
> to change it back!
>
> -Matt
And here is something even scarier: readdirplus from the client side
doesn't appear to work correctly either. This time, you don't need an
IRIX machine to trigger the problem (though it helps :). Do the following
client# mount -o nvsv3,tcp,rdirplus server:/somefs /mnt
client# ls /mnt; du /mnt; etc...
Seems okay so far, right? Ah, but now try to unmount the filesystem:
# umount /mnt
<process wedges, can't be killed, can't log in, other processes wedge, etc..>
With an IRIX server, the machine wedges as soon as you do ls /mnt. With
a FreeBSD server, nothing happens until you try to unmount the filesystem.
The umount process looks like this:
0 418 388 0 -2 0 312 176 vnlock D+ p0 0:00.01 umount /mnt
When the machine got stuck when I tested it with IRIX, I had to take
a crash dump in order to analyze things; the kernel doesn't seem to
be wedged, but I see these:
1063 362 293 0 -2 0 356 0 vnlock D+ v0 0:00.00 (ls)
1063 318 1 17 -2 17 748 0 vnlock DN p0 0:00.00 (mailck)
Actually, it looks like it wedges if you use UDP too, so I guess it's
not related to the transport.
Anybody have any ideas? I did my good deed for the day.
-Bill
--
=============================================================================
-Bill Paul (212) 854-6020 | System Manager, Master of Unix-Fu
Work: wpaul@ctr.columbia.edu | Center for Telecommunications Research
Home: wpaul@skynet.ctr.columbia.edu | Columbia University, New York City
=============================================================================
"It is not I who am crazy; it is I who am mad!" - Ren Hoek, "Space Madness"
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