tcp: rename sk_forced_wmem_schedule() to sk_forced_mem_schedule()

We plan to use sk_forced_wmem_schedule() in input path as well,
so make it non static and rename it.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

diff --git a/include/net/tcp.h b/include/net/tcp.h
index 7ace6ac..841691a 100644 (file)
--- a/include/net/tcp.h
+++ b/include/net/tcp.h
@@ -311,6 +311,8 @@ static inline bool tcp_out_of_memory(struct sock *sk)
        return false;
 }
 
+void sk_forced_mem_schedule(struct sock *sk, int size);
+
 static inline bool tcp_too_many_orphans(struct sock *sk, int shift)
 {
        struct percpu_counter *ocp = sk->sk_prot->orphan_count;

diff --git a/net/ipv4/tcp_output.c b/net/ipv4/tcp_output.c
index 7386d32..bac1a95 100644 (file)
--- a/net/ipv4/tcp_output.c
+++ b/net/ipv4/tcp_output.c
@@ -2816,8 +2816,10 @@ begin_fwd:
  * connection tear down and (memory) recovery.
  * Otherwise tcp_send_fin() could be tempted to either delay FIN
  * or even be forced to close flow without any FIN.
+ * In general, we want to allow one skb per socket to avoid hangs
+ * with edge trigger epoll()
  */
-static void sk_forced_wmem_schedule(struct sock *sk, int size)
+void sk_forced_mem_schedule(struct sock *sk, int size)
 {
        int amt, status;
 
@@ -2864,7 +2866,7 @@ coalesce:
                        return;
                }
                skb_reserve(skb, MAX_TCP_HEADER);
-               sk_forced_wmem_schedule(sk, skb->truesize);
+               sk_forced_mem_schedule(sk, skb->truesize);
                /* FIN eats a sequence byte, write_seq advanced by tcp_queue_skb(). */
                tcp_init_nondata_skb(skb, tp->write_seq,
                                     TCPHDR_ACK | TCPHDR_FIN);