sdp: Limit total memory consumed by rcvbuf

rcvbuf is already limited by the payload in the queue. But also need to limit
total memory consumption of it, since small packets received might have a very
large overhead to the payload.

Signed-off-by: Amir Vadai <amirv@mellanox.co.il>

diff --git a/drivers/infiniband/ulp/sdp/sdp_rx.c b/drivers/infiniband/ulp/sdp/sdp_rx.c
index 4ecd0877259c2b38dfb97f22fcab7bd72bd717b2..3d054d6dc5006e648f22cfb7aefb1aeca561e8c7 100644 (file)
--- a/drivers/infiniband/ulp/sdp/sdp_rx.c
+++ b/drivers/infiniband/ulp/sdp/sdp_rx.c
@@ -282,6 +282,9 @@ static inline int sdp_post_recvs_needed(struct sdp_sock *ssk)
                return 0;
        }
 
+       if (atomic_read(&sk->sk_rmem_alloc) >= sk->sk_prot->sysctl_rmem[2])
+               return 0;
+
        return 1;
 }