Michal Clapinski wrote: > Comments in linux/device/driver.h say that the goal is to do async > probing on all devices. The current behavior unnecessarily slows down > the boot by synchronously probing dax devices, so let's change that. > > For thousands of devices, this change saves >1s of boot time. > > Michal Clapinski (5): > dax: add PROBE_PREFER_ASYNCHRONOUS to the pmem driver > dax: add PROBE_PREFER_ASYNCHRONOUS to the kmem driver > dax: add PROBE_PREFER_ASYNCHRONOUS to the cxl driver > dax: add PROBE_PREFER_ASYNCHRONOUS to the hmem drivers > dax: add PROBE_PREFER_ASYNCHRONOUS to the dax device driver
After seeing the trouble this causes with libdaxctl and failing to find a quick fix I wonder if you should just go through route of eating the potential regressions in your own environment. I.e. instead of making it a problem that the kernel needs to debug for all legacy users, how about you just boot with the command line option: driver_async_probe=device_dax ...or add the following to your mopdrobe configuration: options device_dax async_probe I.e. do you really need to change this policy globally for everyone at this point? I do want to improve this, but I think it will take time for libdaxctl to get ready for this flag day.
