Dongsheng Yang wrote: > From: Dongsheng Yang <dongsheng.yang.linux@xxxxxxxxx> > > Hi all, > This patchset introduce cbd (CXL block device). It's based on linux 6.8, and available at: > https://github.com/DataTravelGuide/linux > [..] > (4) dax is not supported yet: > same with famfs, dax device is not supported here, because dax device does not support > dev_dax_iomap so far. Once dev_dax_iomap is supported, CBD can easily support DAX mode. I am glad that famfs is mentioned here, it demonstrates you know about it. However, unfortunately this cover letter does not offer any analysis of *why* the Linux project should consider this additional approach to the inter-host shared-memory enabling problem. To be clear I am neutral at best on some of the initiatives around CXL memory sharing vs pooling, but famfs at least jettisons block-devices and gets closer to a purpose-built memory semantic. So my primary question is why would Linux need both famfs and cbd? I am sure famfs would love feedback and help vs developing competing efforts.
