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Re: [dm-devel] Kernel oops with dm-cache

On Mon, Dec 09, 2013 at 10:28:07AM +0100, Steinar H. Gunderson wrote:
> On Sun, Dec 08, 2013 at 10:13:05PM -0500, Mike Snitzer wrote:
> > This was fixed with this commit:
> > http://git.kernel.org/cgit/linux/kernel/git/device-mapper/linux-dm.git/commit/?h=for-next&id=47821767d26af4073fcfdfb3b96704f24a23416f
> > 
> > I'll be sending it to Linus at some point this coming week (along with
> > other DM fixes that are staged in the 'for-next' branch of
> > linux-dm.git).
> OK. Will applying this actually make my machine boot again, too? check_cache
> says there's nothing wrong with it, just like last time; dump-cache says
> everything's clean, just like last time. But I'm not nuking it once more,
> the backup restore process was too painful last time :-)

My gut feel is you're running out of metadata space for some reason.
How big is your metadata device?  (Obviously this is no excuse for the

I'm really surprised that cache_dump is giving wrong information;
saying everything is clean, saying you were using the cleaner policy
etc.  Are you sure you're passing it the right metadata dev?

- Joe

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