diff options
| author | Denis Drozdov <denisd@mellanox.com> | 2018-07-29 11:42:28 +0300 |
|---|---|---|
| committer | Jason Gunthorpe <jgg@mellanox.com> | 2018-08-02 00:23:03 +0300 |
| commit | 75da96067ade4e7854379ec2f7834f3497652b1a (patch) | |
| tree | c2d53306b5adefede056c4e352dceac8d6714097 /drivers/infiniband | |
| parent | 0f50d88a6e9ae6d9dd14ed1a7d6b309280a9c23b (diff) | |
| download | linux-75da96067ade4e7854379ec2f7834f3497652b1a.tar.xz | |
IB/IPoIB: Set ah valid flag in multicast send flow
The change of ipoib_ah data structure with adding "valid" flag and
checks of ah->valid in ipoib_start_xmit affected multicast packet flow.
Since the multicast flow doesn't invoke path_rec_start, "ah->valid" flag
remains unset, so that ipoib_start_xmit end up with neigh_refresh_path
instead of sending the packet using neigh.
"ah->valid" has to be set in multicast send flow. As a result IPoIB
starts sending packets via neigh immediately and eliminates 60sec delay
of neigh keep alive interval.
The typical example of this issue are two sequential arpings:
arping 11.134.208.9 -> got response (mcast_send)
arping 11.134.208.9 -> no response (ah->valid = 0)
Fixes: fa9391dbad4b ("RDMA/ipoib: Update paths on CLIENT_REREG/SM_CHANGE events")
Signed-off-by: Denis Drozdov <denisd@mellanox.com>
Reviewed-by: Erez Shitrit <erezsh@mellanox.com>
Reviewed-by: Feras Daoud <ferasda@mellanox.com>
Signed-off-by: Leon Romanovsky <leonro@mellanox.com>
Signed-off-by: Jason Gunthorpe <jgg@mellanox.com>
Diffstat (limited to 'drivers/infiniband')
| -rw-r--r-- | drivers/infiniband/ulp/ipoib/ipoib_multicast.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c index f696ea49c97a..b9e9562f5034 100644 --- a/drivers/infiniband/ulp/ipoib/ipoib_multicast.c +++ b/drivers/infiniband/ulp/ipoib/ipoib_multicast.c @@ -822,6 +822,7 @@ void ipoib_mcast_send(struct net_device *dev, u8 *daddr, struct sk_buff *skb) if (neigh && list_empty(&neigh->list)) { kref_get(&mcast->ah->ref); neigh->ah = mcast->ah; + neigh->ah->valid = 1; list_add_tail(&neigh->list, &mcast->neigh_list); } } |