It seems that for some reason the cover-letter wasn't sent properly,
here's listing of the changes:
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(-)
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