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SubjectSuse 2.4.16 LVM hangs with multiple snapshots of the same LV
I have a single-processor ppro200 with 96M memory running Suse's 2.4.16 
kernel (k_deflt-2.4.16-22). I am creating and mounting many (like 8-10)
snapshots of the same logical volume over a week or so (a poor man's
nightly backup, if you will). The write activity on the source logical
volume is limited to a brief period once per day, starting at 23:20; at
all other times the source logical volume is mounted read-only. The
snapshot logs grow to about 3GB per snapshot volume before the oldest
snapshot is removed. So far, so good.

Unfortunately, the box falls over every few days doing this; it has
lasted anywhere from 1 day to over 1 week. Also, memtest completes one
pass with 0 errors. I got the following in the syslog before the latest
hang:

Mar 11 23:24:12 dailies kernel: clm-2100: nesting info a different FS
Mar 11 23:24:44 dailies last message repeated 15 times
Mar 11 23:25:46 dailies last message repeated 94 times
Mar 11 23:26:48 dailies last message repeated 38 times
Mar 11 23:26:50 dailies last message repeated 2 times
Mar 11 23:37:35 dailies kernel: clm-2100: nesting info a different FS
Mar 11 23:38:27 dailies last message repeated 16 times
Mar 11 23:39:28 dailies last message repeated 33 times
Mar 11 23:40:01 dailies last message repeated 27 times
Mar 11 23:40:03 dailies kernel: clm-2100: nesting info a different FS
Mar 11 23:40:34 dailies last message repeated 22 times
Mar 11 23:41:35 dailies last message repeated 42 times
Mar 11 23:42:32 dailies last message repeated 72 times
Mar 11 23:44:22 dailies kernel: clm-2100: nesting info a different FS
Mar 11 23:45:23 dailies last message repeated 57 times
Mar 11 23:46:27 dailies last message repeated 31 times
Mar 11 23:47:28 dailies last message repeated 53 times
Mar 11 23:48:26 dailies last message repeated 81 times
Mar 11 23:49:27 dailies last message repeated 48 times

Is what I'm doing with the multiple snapshots supported and/or sane? I
found very little information in the various LVM howtos, Sistina, and
google on creating multiple snapshots from a single LV.

Regards,
Brian


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