Your message dated Fri, 23 Jun 2006 16:22:31 +0200 with message-id <[EMAIL PROTECTED]> and subject line Bug#375116: lvm2: Snapshotting the root logical volume crashes the machine, makes it unbootable, and the snapshot can't even be removed when booting from a recovery system has caused the attached Bug report to be marked as done.
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--- Begin Message ---Package: lvm2 Severity: critical Justification: breaks the whole system I unwittingly ran into bug #288354 today. Creating the snapshot froze my machine, as described in that bug report. After a while I rebooted the machine, but it will no longer boot up: device-mapper: 4.1.0-ioctl (2003-12-10) initialised: [EMAIL PROTECTED] Can't expand LV: Snapshot support missing from kernel? 2 logical volume(s) in volume group "main" now active pivot_root: No sKernel panic: Attempted to kill init! uch file or dire ctory /sbin/init: 432: cannot open dev/console: No such file I booted into a recovery system and the various filesystems and volumes seemed fine: rescue:~# lvdisplay --- Logical volume --- LV Name /dev/main/root VG Name main LV UUID x6pkSm-EeXo-a5Mq-B4Qh-JC9K-kxEy-yhtHua LV Write Access read/write LV snapshot status source of /dev/main/rootbackup [active] LV Status available # open 0 LV Size 5.00 GB Current LE 1280 Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:3 --- Logical volume --- LV Name /dev/main/home VG Name main LV UUID mMAlEY-4w0M-rhxD-Er2R-0Z8S-K1nG-CuBBzC LV Write Access read/write LV Status available # open 0 LV Size 5.00 GB Current LE 1280 Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:4 --- Logical volume --- LV Name /dev/main/srv VG Name main LV UUID 3DoKN8-foaO-AkYv-XVyh-x59G-n1zT-OV8LBP LV Write Access read/write LV Status available # open 0 LV Size 10.00 GB Current LE 2560 Segments 1 Allocation inherit Read ahead sectors 0 Block device 253:5 --- Logical volume --- LV Name /dev/main/rootbackup VG Name main LV UUID Zg7bQo-iQT3-w2Sq-voLN-Yj2H-6Owo-Cmjii6 LV Write Access read/write LV snapshot status active destination for /dev/main/root LV Status available # open 0 LV Size 5.00 GB Current LE 1280 Segments 1 Snapshot chunk size 8.00 KB Allocated to snapshot 0.01% Allocation inherit Read ahead sectors 0 Block device 253:2 However, when I try to remove the rootbackup snapshot: rescue:~# lvremove -v /dev/main/rootbackup Using logical volume(s) on command line Do you really want to remove active logical volume "rootbackup"? [y/n]: y Archiving volume group "main" metadata. Found volume group "main" Loading main-root-real Loading main-rootbackup-cow Loading main-rootbackup At this point, the machine crashes as before. I can still ping it, but user space seems totally dead. -- System Information: Debian Release: testing/unstable APT prefers testing APT policy: (530, 'testing'), (520, 'unstable'), (510, 'experimental') Architecture: i386 (i686) Shell: /bin/sh linked to /bin/bash Kernel: Linux 2.6.16-2-k7 Locale: LANG=en_GB.UTF-8, LC_CTYPE=en_GB.UTF-8 (charmap=UTF-8)
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--- Begin Message ---On Fri, Jun 23, 2006 at 02:07:37PM +0100, Sam Morris wrote: > After a while I rebooted the machine, but it will no longer boot up: > device-mapper: 4.1.0-ioctl (2003-12-10) initialised: [EMAIL PROTECTED] > Can't expand LV: Snapshot support missing from kernel? > 2 logical volume(s) in volume group "main" now active You have to load snapshot support as described. > At this point, the machine crashes as before. I can still ping it, but > user space seems totally dead. As you don't describe which version of lvm nor which version of the kernel you use, I can only say: it is fixed. With older versions, it was unreliable to suspend the the root device. Bastian -- Either one of us, by himself, is expendable. Both of us are not. -- Kirk, "The Devil in the Dark", stardate 3196.1
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