On Fri, Oct 29, 2021 at 5:19 PM Jane Chu <jane.chu@xxxxxxxxxx> wrote: > > Hi, Dan, > > I think we're still using _COMPAT, but likely don't need to. Ugh, really? I hope not, that would be unfortunate. Perhaps are you using libndctl / libdaxctl rather than going to /sys/class/dax directly? Those have shipped backwards compatibility for a while now, so applications using those libraries should not notice the switch to the /sys/bus/dax ABI. The only other open source application I could find that had /sys/class/dax dependencies was fio, but I fixed that up years ago as well. > What is your patch based on? This is based on a branch I have with Christoph's recent dax reworks. I have a test merge of that pushed out on my libnvdimm-pending branch if you want to give it a try. https://git.kernel.org/pub/scm/linux/kernel/git/djbw/nvdimm.git/log/?h=libnvdimm-pending
