Laurent, <Snip>
>I haven't tried to myself, it's just an idea that I'm throwing in the >discussion. One of our application engineer had done this and it seems to work fine. But he mentioned some issues with mmap (didn't remember what issue he had). > >> The driver is basically written to allocate multiple pools and buffers >per >> pool to satisfies various memory allocation requirements inside our TI >SDK. > <Snip> >Are you referring to the cmemk driver ? Yes. CMEM. It seems to really be a quick hack >to >short-circuit all the Linux kernel memory management infrastructure and let >userspace allocate physical memory from a private pool of reserved SDRAM. >I'd >be quite surprised if something like that ever ends up in mainline. > Really. I looked at the code and it seems to do io_remap() on the entire memory region and do mmap of the buffer to user space. I am not sure why you think it is short circuiting the kernel memory management. >Regards, > >Laurent Pinchart >
