Hi, If we accept a connection directly, eg without installing a file descriptor for it, or if we use IORING_OP_SOCKET in direct mode, then we have a socket for recv/send that we can fully serialize access to. With that in mind, we can feasibly skip locking on the socket for TCP in that case. Some of the testing I've done has shown as much as 15% of overhead in the lock_sock/release_sock part, with this change then we see none. Comments welcome! -- Jens Axboe
