axboe

4 ms·

1. 1.▲
   by axboe 4y ago

   Thank you for highlighting that, part of the design criteria for io_uring was indeed to be able to do everything. It's even mentioned in the second sentence of the linked write-up, no more "everything is a file... until you need t
2. 2.▲
   by axboe 4y ago

   This is correct, the "u" is for userspace/usermapped. The memory is actually allocate by the kernel, but it's mapped into the applications address space.
3. 3.▲
   by axboe 4y ago

   The buffers are supplied elsewhere outside that example, just consider it an array of pointers to buffers of size BUF_SIZE. br->bufs[] is the shared space, it holds information on the address/size/id of a given buffer.