i have a similar/same issue. i have 2 identical dell 2950 servers.
both are running vmware-server-1.0.4-1gutsy2 only.
uname -a:
Linux devel-vms-01 2.6.22-14-server #1 SMP Tue Feb 12 03:10:53 UTC 2008
x86_64 GNU/Linux
free -m (as of now while things are fine):
total used free shared buffers cached
Mem: 16079 11343 4735 0 40 10718
-/+ buffers/cache: 584 15494
Swap: 6203 0 6203
lvdisplay:
--- Logical volume ---
LV Name /dev/vmware/virtual-machines
VG Name vmware
LV UUID 8KNzsj-NiWT-weMr-Rdvg-ULWT-q4rf-HBUCM9
LV Write Access read/write
LV Status available
# open 1
LV Size 1.35 TB
Current LE 353864
Segments 1
Allocation inherit
Read ahead sectors 0
Block device 254:2
i'm using a script that shutsdown the vm i want to backup, then makes a
snapshot and restarts the vm. the snapshots were taking around a minute when
it was working. i found that i could run some syncs before actually doing the
snapshot and the snapshot step would be instantaneous. until of course, it
hangs seemingly forever. i have to use sysrq to reboot as previously mentioned.
i have dmesg output from 2 times when the snapshot process hung which
i'm attaching. both appear to be stuck in the xfs driver, but at
slightly different places.
it would be great if this could be resolved, but it sounds like
switching to a different filesystem is going to be required. i was able
to run my script and backup about 9 vms on one machine without any
issues, but when i tried it on the production machine that only had 3
vms (1 fairly active) i started getting the hangs. then when trying
again on the machine that was working i got hangs after a couple of
snapshots worked.
** Attachment added: "dmesg output from "echo t > /proc/sysrq-trigger"
http://launchpadlibrarian.net/13267769/task-dump.0
--
LVM snapshot freezes system since 7.10 upgrade
https://bugs.launchpad.net/bugs/163807
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