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Re: [dm-devel] lvm2 hangs when creating snapshot of live root and IO to the root filesystem is happening



Dne 9.1.2013 21:20, Peter & Kelly Passchier napsal(a):
1. One-line summary
lvm2 hangs when creating snapshot of live root and IO to the root filesystem
is happening


2. Full description
Root filesystem ext4 on lvm2 extent in luks-encrypted
partition with mainline kernel 3.8-rc2.
This is causing a hang:
lvcreate -s -n oscopy -v -l 100%FREE /dev/secret/root 2>/root/savefile

See: https://bugs.launchpad.net/ubuntu/+source/linux/+bug/1096520


Attach full -vvvv trace.

Hmm bugreport talks about  2.6.35 kernel.

My first suspect would be the 'Debian way' of handling udev rules - handling differes from the upstream solution and must be tracked and fixed on Debian.


6. Script to replicate the problem
lvcreate -s -n oscopy -v -l 100%FREE /dev/secret/root 2>/root/savefile

'-vvvv'


Attach also 'changes' to udev rules from the upstream solution.

Probably  udevadm  monitoring output would be also useful.

Any cookies left unfinished  'dmsetup udevcookies' ?


Zdenek


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