tcp: avoid order-1 allocations on wifi and tx path

[pandora-kernel.git] / net / ipv4 / tcp.c

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index cfd7edd..a5daa21 100644 (file)
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -701,11 +701,12 @@ struct sk_buff *sk_stream_alloc_skb(struct sock *sk, int size, gfp_t gfp)
        skb = alloc_skb_fclone(size + sk->sk_prot->max_header, gfp);
        if (skb) {
                if (sk_wmem_schedule(sk, skb->truesize)) {
+                       skb_reserve(skb, sk->sk_prot->max_header);
                        /*
                         * Make sure that we have exactly size bytes
                         * available to the caller, no more, no less.
                         */
-                       skb_reserve(skb, skb_tailroom(skb) - size);
+                       skb->avail_size = size;
                        return skb;
                }
                __kfree_skb(skb);
@@ -860,7 +861,7 @@ wait_for_memory:
        }
 
 out:
-       if (copied)
+       if (copied && !(flags & MSG_SENDPAGE_NOTLAST))
                tcp_push(sk, flags, mss_now, tp->nonagle);
        return copied;
 
@@ -995,10 +996,9 @@ new_segment:
                                copy = seglen;
 
                        /* Where to copy to? */
-                       if (skb_tailroom(skb) > 0) {
+                       if (skb_availroom(skb) > 0) {
                                /* We have some space in skb head. Superb! */
-                               if (copy > skb_tailroom(skb))
-                                       copy = skb_tailroom(skb);
+                               copy = min_t(int, copy, skb_availroom(skb));
                                err = skb_add_data_nocache(sk, skb, from, copy);
                                if (err)
                                        goto do_fault;
@@ -3302,8 +3302,7 @@ void __init tcp_init(void)
 
        tcp_init_mem(&init_net);
        /* Set per-socket limits to no more than 1/128 the pressure threshold */
-       limit = nr_free_buffer_pages() << (PAGE_SHIFT - 10);
-       limit = max(limit, 128UL);
+       limit = nr_free_buffer_pages() << (PAGE_SHIFT - 7);
        max_share = min(4UL*1024*1024, limit);
 
        sysctl_tcp_wmem[0] = SK_MEM_QUANTUM;