[linux-lvm] lvm Bug? - bad reaction to snapshot creation

Zdenek Kabelac zkabelac at redhat.com
Tue Jun 10 08:31:23 UTC 2014

Dne 9.6.2014 16:53, Leeman Strout napsal(a):
> On 06/09/2014 05:50 AM, Zdenek Kabelac wrote:
>> Dne 7.6.2014 01:26, Leeman Strout napsal(a):
>> Hi
>> Unsure if this relates to all your problem (since I'm not sure how
>> arch linux is in sync with udev rules & systemd version)
>> At certain moment systemd added a new 'feature' about locking
>> devices while updating internal udev state - this locking ignores any
>> udev rule flags and opens internal lvm2 devices - so while for now
>> it's been again disabled for 'dm' devices - you might have installed
>> version of system which has the 'lock everything' feature in?
> systemd 213-6 is what Arch reports, as far as I can tell from the PKGBUILD
> it's vanilla 213 plus 2 patches:
> - backport fix for faily MACAddress matching (FS#40675)
> - backport fix for fsck/udev mess (FS#40706)

this commit should be fixing problems for lvm2 & latest systemd:


and this is systemd commit which has introduced problem:


Unsure what do you have in your arch build.

>> Thought this doesn't explain your 'counter below zero' error - this
>> looks like some incorrect udev rules are running in the field ? (Or
>> maybe multiple systemd-udevd are running ?)
> After a clean restart of everything twice without doing snapshots, the initial
> lvcreate does not have the 'counter below zero' error.  And with special
> attention to make sure the snapshots are cleaned up prior to attempting a new
> snapshot I am not getting this initial decrement on lvcreate.

So could we consider this  'counter' case is solved ?


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