On 4/28/21 6:11 AM, Pavel Begunkov wrote: > Allow empty reg buffer slots any request using which should fail. This > allows users to not register all buffers in advance, but do it lazily > and/or on demand via updates. That is achieved by setting iov_base and > iov_len to zero for registration and/or buffer updates. Empty buffer > can't have a non-zero tag. > > Implementation details: to not add extra overhead to io_import_fixed(), > create a dummy buffer crafted to fail any request using it, and set it > to all empty buffer slots. Applied, thanks. -- Jens Axboe
