Ira Weiny wrote: [..] > > However, after that, I tried to create a dax device as below, it failed. > > > > root@debian:~# daxctl create-device -r region0 -v > > libdaxctl: __dax_regions_init: no dax regions found via: /sys/class/dax
Note that /sys/class/dax support was removed from the kernel back in v5.17: 83762cb5c7c4 dax: Kill DEV_DAX_PMEM_COMPAT daxctl still supports pre-v5.17 kernels and always checks both subsystem types. This is a debug message just confirming that it is running on a new kernel, see dax_regions_init() in daxctl. > > error creating devices: No such device or address > > created 0 devices > > root@debian:~# > > > > root@debian:~# ls /sys/class/dax > > ls: cannot access '/sys/class/dax': No such file or directory > > Have you update daxctl with cxl-cli? > > I was confused by this lack of /sys/class/dax and checked with Vishal. He > says this is legacy. > > I have /sys/bus/dax and that works fine for me with the latest daxctl > built from the ndctl code I sent out: > > https://github.com/weiny2/ndctl/tree/dcd-region3-2025-04-13 > > Could you build and use the executables from that version? The same debug message still exists in that version and will fire every time when debug is enabled.
