I've read tutorials and seen example programs on how to get page information into userspace (eventually, I'll want to dma from a UIO driver) For POC, I have a simple driver with an mmap rule, which does kmalloc on a new buffer. The driver can read/write the memory, and the user space program can read/write the memory (and both sides agree on the data read/written). It appears in /proc/self/maps, and when I try to look it up in /proc/self/pagemap, it says its neither swapped nor present. This seems like a clever way -- if it works (the alternative is sloppy ioctl's or other custom methods) -- Marty Leisner <linux@xxxxxxxxxxxxxxxx>
