> I am a bit concerned here. In the current usage model, target QPs are > destroyed when their reference > count goes to zero > (ib_reg_xrc_recv_qp and ibv_xrc_create_qp increment the reference count, > while ib_unreg_xrc_recv_qp > decrements it). > In this model, the TGT QP user/consumer does not need to know if it is the > last user of the QP (and > therefore should > destroy it). The QP simply gets destroyed when no one is left using it. > > In your proposed model, it looks like the last TGT QP user needs to know that > it is the last user and > must therefore destroy > the TGT QP (rather than the QP being destroyed automatically as the result of > the ref count going to > zero). > > Am I correct? > > (Or does every user -- both the creator and the caller of ib_open_qp do an > ib_destroy_qp() -- and the > destroy actually > occurs when no users who did open/create remain?).
The latter is correct. The caller of ib_create_qp() and ib_open_qp() all call ib_destroy_qp() if they wish to destroy the QP once the reference count hits zero. -- To unsubscribe from this list: send the line "unsubscribe linux-rdma" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
