These two patches optimize the memory ordering in rxe_queue.h so
that user space and not kernel space indices are protected for loads
with smp_load_acquire() and stores with smp_store_release(). The
original implementation of this did not apply to all index references
which has recently caused test case errors traced to stale memory loads.
These patches fix those errors.
Reported-by: Zhu Yanjun <zyjzyj2000@xxxxxxxxx>
Fixes: d21a1240f516 ("RDMA/rxe: Use acquire/release for memory ordering")
Signed-off-by: Bob Pearson <rpearsonhpe@xxxxxxxxx>
---
v2:
Added a way to distinguish between user and kernel indices.
---
Bob Pearson (2):
RDMA/rxe: Add a type flag to rxe_queue structs
RDMA/rxe: Protect user space index loads/stores
drivers/infiniband/sw/rxe/rxe_cq.c | 4 +-
drivers/infiniband/sw/rxe/rxe_qp.c | 12 +-
drivers/infiniband/sw/rxe/rxe_queue.c | 8 +-
drivers/infiniband/sw/rxe/rxe_queue.h | 181 ++++++++++++++++++--------
drivers/infiniband/sw/rxe/rxe_srq.c | 4 +-
5 files changed, 145 insertions(+), 64 deletions(-)
--
2.30.2
