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@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. _______________________________________________ linux-lvm mailing list linux-lvm@redhat.com https://www.redhat.com/mailman/listinfo/linux-lvm read the LVM HOW-TO at http://tldp.org/HOWTO/LVM-HOWTO/