[dm-devel] Help request: setting up /dev/zero using dm-crypt ...

[Ravi Prakash Putchala]

Hi,

We would like to experiment and see the performance results with different
options of dm-crypt. To do this we would like to setup /dev/zero with
dm-crypt as mentioned in
https://www.redhat.com/archives/dm-devel/2015-February/msg00106.html
However, when I did the following no new mapping gets created in
/dev/mapper:

# cryptsetup -y luksFormat /dev/zero
# cryptsetup luksOpen /dev/zero dm-zero
# cryptsetup status /dev/mapper/dm-zero
/dev/mapper/dm-zero is inactive.

Could you please help by giving instructions on how to do this right?

Thank you.

Ravi
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