On 8/18/2016 10:55 AM, Yishai Hadas wrote:
3) Add IBV_WC_TSO to be used as part of poll_cq to report a TSO completion.
why is that needed? what's the proposed/possible applicative usage of
that bit?
It's consistent with the kernel API that adds similar bit for LSO.
http://lxr.free-electrons.com/source/include/rdma/ib_verbs.h#L842
C&P is not something you want to use as argument, specifically if no one
uses this 10y old define nowadays (and maybe never)
net.git]# git grep IB_WC_LSO drivers/infiniband/ include/rdma/
drivers/infiniband/hw/mlx4/cq.c: wc->opcode = IB_WC_LSO;
include/rdma/ib_verbs.h: IB_WC_LSO,
Specifically, it can give an application an accurate knowledge about the completion type as done for other cases as part of ibv_post_send as of IBV_WC_BIND_MW, IBV_WC_LOCAL_INV, etc.
IPoIB uses LSO for 10y and doesn't need that, I don't see why user-space
IPoIBs would need that
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