From mboxrd@z Thu Jan  1 00:00:00 1970
From: Gabriel de Perthuis <g2p.code-Re5JQEeQqe8AvxtiuMwx3w@public.gmane.org>
Subject: bcache oops with 3.12-rc3
Date: Sat, 05 Oct 2013 23:51:02 +0200
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Hello,
I have this reproducible crash soon after booting:
http://i.imgur.com/ynDFOI2.jpg

Partial transcript:
bch_insert_data
closure_queue
request_write
cached_dev_make_request

bcache is stacked on top of LVM.

I've confirmed it with this vanilla kernel:
http://kernel.ubuntu.com/~kernel-ppa/mainline/v3.12-rc3-saucy/