[linux-lvm] kernel panic on lvcreate
Stuart D. Gathman
stuart at bmsi.com
Wed Nov 4 18:58:51 UTC 2009
On Tue, 3 Nov 2009, Christopher Hawkins wrote:
> Actually it looks like the reverse might be true. I tried this on a box with
> older kernel 2.6.18-92.1.22.el5 and there is no panic. I upgraded that box to
> kernel 2.6.18-164.2.1.el5, reboot, and now the panic is reproducible. Trying
> to get an oops, will post again soon.
I believe I am getting the same thing. An lvcreate -s ... on the root
filesystem of dom0 causes a kernel panic. This happened at 5:30am via cron.
This has been working for years, and seems to have started when we rebooted to
load kernel-xen-2.6.18-164.el5. After the crash, the BIOS was unable to
respond to the soft power button, and the system required a hard poweroff.
Unfortunately, the person on site this morning didn't get anything from the
console. Just like the OP, the snapshot is created after the reboot, BUT not
attached to the origin. The snapsnot causing the crash was c5_SNAP below:
# lvs
LV VG Attr LSize Origin Snap% Move Log Copy% Convert
backup backvg6 -wi-ao 232.88G
BWI rootvg -wi-a- 20.00G
C4 rootvg -wi-ao 30.00G
C4_SWAP rootvg -wi-ao 512.00M
CentOS5 rootvg -wi-a- 9.75G
DFL rootvg -wi-a- 10.00G
DFL_SWAP rootvg -wi-a- 512.00M
GEN rootvg -wi-a- 10.00G
GENSWAP rootvg -wi-a- 512.00M
SPAN rootvg -wi-a- 30.00G
SPD rootvg -wi-ao 20.00G
SPD_SWAP rootvg -wi-ao 512.00M
USEXP rootvg -wi-a- 10.00G
c5 rootvg -wi-ao 40.00G
c5_SNAP rootvg -wi-a- 2.00G
c5_swap rootvg -wi-ao 2.00G
# rpm -q kernel-xen lvm2
kernel-xen-2.6.18-164.el5
lvm2-2.02.46-8.el5
# diff backup/rootvg archive/rootvg_01566.vg
6c6
< description = "Created *after* executing '/usr/sbin/lvcreate -s -L 2G -n c5_SNAP /dev/rootvg/c5'"
---
> description = "Created *before* executing '/usr/sbin/lvcreate -s -L 2G -n c5_SNAP /dev/rootvg/c5'"
13c13
< seqno = 2340
---
> seqno = 2339
345,363d344
<
< c5_SNAP {
< id = "vdbcj3-1E3H-5ywU-QSJ8-M3W6-dLbj-FDr035"
< status = ["READ", "WRITE", "VISIBLE"]
< flags = []
< segment_count = 1
<
< segment1 {
< start_extent = 0
< extent_count = 64 # 2 Gigabytes
<
< type = "striped"
< stripe_count = 1 # linear
<
< stripes = [
< "pv3", 1920
< ]
< }
< }
--
Stuart D. Gathman <stuart at bmsi.com>
Business Management Systems Inc. Phone: 703 591-0911 Fax: 703 591-6154
"Confutatis maledictis, flammis acribus addictis" - background song for
a Microsoft sponsored "Where do you want to go from here?" commercial.
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