changes from V0: - following feedback from Mike and Dave, changed the ipoib_neigh hash table to allow for lock-free read side, the model follows the RCU based implementation in net/core/neighbour.c
- since RCU hash table uses unidirectional collision list, now ipoib_neigh_free needs to do a linked search in order to find the deleted neighbour predecessor in order to link it to the neighbour successor. - different implementation of hash lookup in ipoib_neigh_get (read-side) vs ipoib_neigh_alloc and ipoib_neigh_free (write-side) - path_free and ipoib_mcast_free now make use of the ipoib_del_neighs_by_gid helper function in order to delete neighbours related to that path or mcast. This new helper scans the hash table and deletes neighbours with the given GID. It had to be done this way of as of the unidrectional nature of the linking which by itself arises from the lock free requirement made here... - a completion mechanism was added to prevent freeing the IPoIB netdevice priv data structure before the RCU based code freed all the neighbours. Again, the patch was made over net-next as of few IPoIB changes that took place there and the parallel submission of the eIPoIB driver. Or. Shlomo Pongratz (1): IB/ipoib: break linkage to neighbouring system drivers/infiniband/ulp/ipoib/ipoib.h | 59 ++- drivers/infiniband/ulp/ipoib/ipoib_cm.c | 16 +- drivers/infiniband/ulp/ipoib/ipoib_main.c | 638 +++++++++++++++++------ drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 57 +-- 4 files changed, 535 insertions(+), 235 deletions(-) Cc: Shlomo Pongratz <shlo...@mellanox.com> -- 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
