On 6/23/21 6:05 PM, Coly Li wrote: > On 6/23/21 3:21 PM, Christoph Hellwig wrote: > Does the already mapped DAX base address change in runtime during memory > hot plugable ? > If not, it won't be a problem here for this specific use case. >> It could change between one use and another. > Hmm, I don't understand the implicit meaning of the above line. > Could you please offer a detail example ? > Hi Christoph, I feel I come to understand "It could change between one use and another." Yes, this is a problem for full pointer design. I will switch to base + offset format. Thank you for joining the discussion and provide your comments, to help me have improved understand for better design :-) Coly Li