1 files changed, 13 insertions, 13 deletions

diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index cfd7edda0a8e..1272a88c2a63 100644
--- 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;
@@ -1452,7 +1452,7 @@ int tcp_recvmsg(struct kiocb *iocb, struct sock *sk, struct msghdr *msg,
                 if ((available < target) &&
                     (len > sysctl_tcp_dma_copybreak) && !(flags & MSG_PEEK) &&
                     !sysctl_tcp_low_latency &&
-                    dma_find_channel(DMA_MEMCPY)) {
+                    net_dma_find_channel()) {
                         preempt_enable_no_resched();
                         tp->ucopy.pinned_list =
                                         dma_pin_iovec_pages(msg->msg_iov, len);
@@ -1667,7 +1667,7 @@ do_prequeue:
                 if (!(flags & MSG_TRUNC)) {
 #ifdef CONFIG_NET_DMA
                         if (!tp->ucopy.dma_chan && tp->ucopy.pinned_list)
-                                tp->ucopy.dma_chan = dma_find_channel(DMA_MEMCPY);
+                                tp->ucopy.dma_chan = net_dma_find_channel();
 
                         if (tp->ucopy.dma_chan) {
                                 tp->ucopy.dma_cookie = dma_skb_copy_datagram_iovec(
@@ -3243,7 +3243,7 @@ void __init tcp_init(void)
 {
         struct sk_buff *skb = NULL;
         unsigned long limit;
-        int max_share, cnt;
+        int max_rshare, max_wshare, cnt;
         unsigned int i;
         unsigned long jiffy = jiffies;
 
@@ -3302,17 +3302,17 @@ 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);
-        max_share = min(4UL*1024*1024, limit);
+        limit = nr_free_buffer_pages() << (PAGE_SHIFT - 7);
+        max_wshare = min(4UL*1024*1024, limit);
+        max_rshare = min(6UL*1024*1024, limit);
 
         sysctl_tcp_wmem[0] = SK_MEM_QUANTUM;
         sysctl_tcp_wmem[1] = 16*1024;
-        sysctl_tcp_wmem[2] = max(64*1024, max_share);
+        sysctl_tcp_wmem[2] = max(64*1024, max_wshare);
 
         sysctl_tcp_rmem[0] = SK_MEM_QUANTUM;
         sysctl_tcp_rmem[1] = 87380;
-        sysctl_tcp_rmem[2] = max(87380, max_share);
+        sysctl_tcp_rmem[2] = max(87380, max_rshare);
 
         pr_info("Hash tables configured (established %u bind %u)\n",
                 tcp_hashinfo.ehash_mask + 1, tcp_hashinfo.bhash_size);