On Wed, Nov 04, 2020 at 03:09:04PM +0000, Bernard Metzler wrote: > lkey of zero to pass a physical buffer, only allowed for > kernel applications? Very nice idea I think. It already exists, it is called the local_dma_lkey, just set IB_DEVICE_LOCAL_DMA_LKEY and provide the value you want to use in device->local_dma_lkey > btw. > It would even get the vain blessing of the old IETF RDMA > verbs draft ;) > > https://tools.ietf.org/html/draft-hilland-rddp-verbs-00#page-90 IBTA standadized this, they just didn't require HW to use 0 as the lkey. Jason
