On 18/10/2018 20:43, Mike Snitzer wrote: > On Fri, Oct 12 2018 at 7:56am -0400, > laurent cop <laurent.cop@xxxxxxxxx> wrote: > >> 2) Is it normal to have low performances while writing with dd. I was >> using LUKS previously and I got only one dev mapper. Now I got 2. Does it >> have a big impact on performances? > > This last question really makes me wonder: did you intend to enable the > use of dm-integrity? If you use an authenticated encryption in LUKS2, it must use dm-integrity as a backend, so you get two stacked devices. (Authentication tag and random IV must be stored together with every sector, here dm-integrity just provides a space for it, it does not calculate anything, all is up to dm-crypt.) m. -- dm-devel mailing list dm-devel@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/dm-devel
