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List:       linux-lvm
Subject:    Re: [linux-lvm] deadlock during lvm snapshot target
From:       Zdenek Kabelac <zkabelac () redhat ! com>
Date:       2016-11-29 15:59:12
Message-ID: 71a09047-1d6c-88b0-84d7-88049a5bbd15 () redhat ! com
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Dne 29.11.2016 v 11:28 Tomaz Beltram napsal(a):
> On 29. 11. 2016 09:38, Zdenek Kabelac wrote:
> > 
> > Please switch to newer version of lvm2.
> > 
> > Sequence with snapshot activation had been reworked to minimize possibility
> > to hit this kernel race - race is still there even with the latest kernel, but in \
> > the real world you should not have a much chance to hit it.
> Thanks for the explanation. I reported this to Ubuntu launchpad. Please add
> your votes.
> 
> https://bugs.launchpad.net/ubuntu/+source/lvm2/+bug/1645636
> 


Yep just a minor comment - it's not 'fixed' - but the chance to hit the race 
have been considerably decreased - but we still have an example where it could 
be demonstrated (and it's not just 'dm' - it's more generic - see Mikulas's post)

Regards

Zdenek


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