Thanks Toshi! On Mon, Jun 13, 2016 at 3:21 PM, Toshi Kani <[email protected]> wrote: > This patch-set adds DAX support to device-mapper dm-linear devices > used by LVM. It works with LVM commands as follows: > - Creation of a logical volume with all DAX capable devices (such > as pmem) sets the logical volume DAX capable as well. > - Once a logical volume is set to DAX capable, the volume may not > be extended with non-DAX capable devices.
I don't mind this, but it seems a policy decision that the kernel does not need to make. A sufficiently sophisticated user could cope with DAX being available at varying LBAs. Would it be sufficient to move this policy decision to userspace tooling? > The direct_access interface is added to dm and dm-linear to map > a request to a target device. I had dm-linear and md-raid0 support on my list of things to look at, did you have raid0 in your plans?
