hi,

This patch is necessary to be able to mount snapshots of journalling
filesystems. It was flying around lvm for long time, years!!.
And LiNUX distributions bring it, Red Hat at least since 7.x.
So, it should be sure.

Last thread about it [1] is recent and the patch still is pending...

[1] http://marc.theaimsgroup.com/?t=106623259800004&r=1&w=2

-thanks-