Description of Problem:
while copying large (avi) files from one mounted filesystem to another, the
kernel panics.  The offending comand is:

       cp /tmp/tv-200202101700-59m-CH46.avi /home/bishop/vcr-out

s/cp/mv/ for the same result (since mv over mounted FSes is really cp&&rm).

The FS is not full:

Filesystem           1k-blocks      Used Available Use% Mounted on
/dev/hda1              9273984   2693332   6109548  31% /
/dev/hdb1             20161172  17430536   1706496  92% /home


[root@ducky root]# cat /etc/mtab | grep relevant-bits
/dev/hda1 / ext3 rw 0 0
/dev/hdb1 /home ext2 rw 0 0

Version-Release number of selected component (if applicable):

How Reproducible:

Twice today, but only with the large file.  a 200Mb avi was successfully copied.

Steps to Reproduce:
1. take one updated RH72 system
2. mount one FS e2, one e3.
3. cp larger file from e3 to e2 fs.

Actual Results:
Kernel Panic.

Expected Results:
cp succeeds.

Additional Information:

System is an athlon 900Mhz on an ASUS a7v133 mobo, with 512M RAM and 256M swap.
 it's got a 10G ide drive hooked to its 33Mbit IDE, and a 60G UDMA100 drive
hooked to its 100Mbit iface.

This system is 3012 miles away from me, and is a logistical nightmare so I can't
reboot it often (requires a call-out).

The tech called out this morning has taken some rough screen shots (literally,
because she had her new cam in the car).  I'll attach them.