X-Git-Url: http://git.onelab.eu/?a=blobdiff_plain;f=net%2Fcore%2Fstream.c;h=e9489696f694540bfb90d12aba6e1cd3c5dd1d57;hb=9464c7cf61b9433057924c36e6e02f303a00e768;hp=d1d7decf70b0087af2de9358049e5e43ed46d326;hpb=41689045f6a3cbe0550e1d34e9cc20d2e8c432ba;p=linux-2.6.git

diff --git a/net/core/stream.c b/net/core/stream.c
index d1d7decf7..e9489696f 100644
--- a/net/core/stream.c
+++ b/net/core/stream.c
@@ -196,13 +196,15 @@ EXPORT_SYMBOL(sk_stream_error);
 
 void __sk_stream_mem_reclaim(struct sock *sk)
 {
-	atomic_sub(sk->sk_forward_alloc / SK_STREAM_MEM_QUANTUM,
-		   sk->sk_prot->memory_allocated);
-	sk->sk_forward_alloc &= SK_STREAM_MEM_QUANTUM - 1;
-	if (*sk->sk_prot->memory_pressure &&
-	    (atomic_read(sk->sk_prot->memory_allocated) <
-	     sk->sk_prot->sysctl_mem[0]))
-		*sk->sk_prot->memory_pressure = 0;
+	if (sk->sk_forward_alloc >= SK_STREAM_MEM_QUANTUM) {
+		atomic_sub(sk->sk_forward_alloc / SK_STREAM_MEM_QUANTUM,
+			   sk->sk_prot->memory_allocated);
+		sk->sk_forward_alloc &= SK_STREAM_MEM_QUANTUM - 1;
+		if (*sk->sk_prot->memory_pressure &&
+		    (atomic_read(sk->sk_prot->memory_allocated) <
+		     sk->sk_prot->sysctl_mem[0]))
+			*sk->sk_prot->memory_pressure = 0;
+	}
 }
 
 EXPORT_SYMBOL(__sk_stream_mem_reclaim);