On Thu, Feb 14 2013 at 9:34pm -0500,
Alasdair G Kergon <agk@xxxxxxxxxx> wrote:
> On Thu, Feb 14, 2013 at 06:07:56PM -0800, Eric Wheeler wrote:
> > Does this indicate a corrupt volume or metadata volume?
>
> It could be a software bug.
> It is always worth trying the newest code, but I don't spot any
> obvious change that could be related to this.
...
> The trace shows it's applying a 'discard' to the metadata and releasing
> blocks when the problem occurs.
Right, given that the BUG trace shows active discards it could be that
v3.8 commit e808807 ("dm thin: fix race between simultaneous io and
discards to same block") may help.
(though I never saw that race manifest with the BUG in question)
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