Testing linux-3.10 and rbd format v2

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Hi,

I've built a copy of linux 3.10-rc6 (and added the patch from
ceph-client/for-linus) however when I try and map a rbd image created
with:

# rbd create test-format-2 --size 10240 --format 2

and then run a map on the machine running the new kernel:

# rbd map test-format-2
rbd: add failed: (22) Invalid argument

I receive the following message in dmesg:

# dmesg | grep rbd
rbd: image test-format-2: unsupported stripe unit (got 4194304 want 1)

Reading the docs it seems a striping unit of 1 is definitely not
wanted at all. Have I misbuilt or misconfigured the kernel at all? Or
created the image incorrectly?

Thanks in advance,
Damien
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