hang when creating lvm snapshot
Affects | Status | Importance | Assigned to | Milestone | |
---|---|---|---|---|---|
linux (Ubuntu) |
New
|
Undecided
|
Unassigned |
Bug Description
Since the update to kernel
linux-image-
on my amd64 system, with a dm-crypt -mapped harddisk with lvm layered on top of dm-crypt, the system often hangs (any applications doing disk i/o get blocked forever) when I try to create a snapshot - only way is to hard reset.
launchpad bug #595489 looks very similar
i'm attaching 2 dmesg outputs with output by the kernel after applications beeing blocked for more than 120s ....
ProblemType: Bug
DistroRelease: Ubuntu 10.04
Package: linux-image-
Regression: Yes
Reproducible: Yes
ProcVersionSign
Uname: Linux 2.6.32-24-generic x86_64
AlsaVersion: Advanced Linux Sound Architecture Driver Version 1.0.21.
Architecture: amd64
AudioDevicesInUse:
USER PID ACCESS COMMAND
/dev/snd/
CRDA: Error: [Errno 2] No such file or directory
Card0.Amixer.info:
Card hw:0 'SB'/'HDA ATI SB at 0xfe020000 irq 16'
Mixer name : 'Realtek ALC883'
Components : 'HDA:10ec0883,
Controls : 38
Simple ctrls : 21
Date: Fri Jul 30 10:43:17 2010
HibernationDevice: RESUME=
MachineType: System manufacturer System Product Name
ProcCmdLine: BOOT_IMAGE=
ProcEnviron:
LC_TIME=C
LC_COLLATE=C
PATH=(custom, user)
LANG=en_US.UTF-8
SHELL=/bin/bash
RelatedPackageV
RfKill:
0: hci0: Bluetooth
Soft blocked: no
Hard blocked: no
SourcePackage: linux
dmi.bios.date: 03/28/2008
dmi.bios.vendor: Phoenix Technologies, LTD
dmi.bios.version: ASUS M2A-VM ACPI BIOS Revision 1705
dmi.board.name: M2A-VM
dmi.board.vendor: ASUSTeK Computer INC.
dmi.board.version: 1.XX
dmi.chassis.
dmi.chassis.type: 3
dmi.chassis.vendor: Chassis Manufacture
dmi.chassis.
dmi.modalias: dmi:bvnPhoenixT
dmi.product.name: System Product Name
dmi.product.
dmi.sys.vendor: System manufacturer
i was able to capture the dmesg's to another lvm logical volume disk despite i/o beeing blocked on the lvm locical volume that i was trying to take a snapshot of, like so
sudo lvcreate -s -n data.snap -l100%FREE /dev/babar/data
sudo lvcreate -s -n home.snap -l100%FREE /dev/babar/home
i have 225 lvm physical extents free at the end of the disk and the snapshots used to work like a charm in linux-2.6.32-22 (and -23 as well, i think)
judging from the diff from -22 to -24 it could be something about ext4...
btw... why is the linux_2. 6.32-23. 37.diff. gz not available in archive.ubuntu.com ???