Hi Yishai,
This series from Yonatan introduces the NULL MR type and its related verbs. It is used to force local HCA operations to skip the PCI bus access, while keeping track of the processed length in the ibv_sge handling. Meaning, instead of a PCI write access the HCA leaves the target memory untouched, and skips filling that packet section. Similar behavior is done upon send, the HCA skips data which is pointed by that NULL MR and saves PCI bus access. This functionality saves PCI read/write operations and improve performance.
Performance of what? I read this but can't figure out what its meant to be used for. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
