On Wed, Mar 19, 2025 at 08:32:19AM -0700, Joe Damato wrote: > See the docs on MSG_ZEROCOPY [1], but in short when a user app calls > sendmsg and passes MSG_ZEROCOPY a completion notification is added > to the error queue. The user app can poll for these to find out when > the TX has completed and the buffer it passed to the kernel can be > overwritten. Yikes. That's not just an ugly interface, but something entirely specific to sockets and incompatible with all other asynchronous I/O interfaces. > > and why aren't you simply plugging this into io_uring and generate > > a CQE so that it works like all other asynchronous operations? > > I linked to the iouring work that Pavel did in the cover letter. > Please take a look. Please write down what matters in the cover letter, including all the important tradeoffs.
