Re: [Linaro-mm-sig] Memory Management Discussion

• Efficient lookup in system calls
• Established ways to pass them around
• Easy to mmap() -- if you want to map anything into user space, you

need a file descriptor anyway

This isn't a great boon as we've seen with GEM and TTM.

The problem for GEM was we used shmem to back the fds, so the mmap was a cached mapping, now when we had alternate mapping available such as via the GTT we had to go and add code to mmap via that drm file descriptor. Though probably could have gotten around that by changing the mmap backing away from shmem.

Dave.