[linux-lvm] persistent value of tunables for dmsetup --target=cache ?

[Mike Snitzer]

On Wed, Apr 22 2015 at  5:48am -0400,
Zdenek Kabelac <zkabelac at redhat.com> wrote:

> Dne 21.4.2015 v 10:58 nikhil napsal(a):
> >Hello,
> >
> >how do I ensure that the tunable (for eg. dmsetup message vg02-jetcache_lv 0
> >write_promote_adjustment 0) will remain the same value even after reboot?
> >
> >Seems like the tunables values reset to earlier values upon reboot of the
> >machine.
> >
> >Help! :)
> 
> 
> By using them, when you create/load  dm table for your cache target.

Best to use lvm2 to create/configure/tune dm-cache.  Otherwise, if
you're just using the dmsetup interface directly you won't have your
tunings persist.