Hi, One of the things we currently cannot do with direct descriptors is pass it to another application or ring. This adds support for doing so, through the IORING_OP_MSG_RING ring-to-ring messaging opcode. Changes since v1: - Add IORING_MSG_RING_CQE_SKIP flag for IORING_OP_MSG_RING - Expand commit message in patch 2 -- Jens Axboe