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authorEric Dumazet <eric.dumazet@gmail.com>2009-06-16 06:12:03 -0400
committerDavid S. Miller <davem@davemloft.net>2009-06-17 07:31:25 -0400
commitc564039fd83ea16a86a96d52632794b24849e507 (patch)
tree42c9f525d08ea2e7d36c0231cc628587a175a39b /net/x25
parent1d4ac5d5ef9dd965ae211ebe8acbf83dc4d9571b (diff)
net: sk_wmem_alloc has initial value of one, not zero
commit 2b85a34e911bf483c27cfdd124aeb1605145dc80 (net: No more expensive sock_hold()/sock_put() on each tx) changed initial sk_wmem_alloc value. Some protocols check sk_wmem_alloc value to determine if a timer must delay socket deallocation. We must take care of the sk_wmem_alloc value being one instead of zero when no write allocations are pending. Reported by Ingo Molnar, and full diagnostic from David Miller. This patch introduces three helpers to get read/write allocations and a followup patch will use these helpers to report correct write allocations to user. Reported-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Eric Dumazet <eric.dumazet@gmail.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/x25')
-rw-r--r--net/x25/af_x25.c3
1 files changed, 1 insertions, 2 deletions
diff --git a/net/x25/af_x25.c b/net/x25/af_x25.c
index c51f3095739c..8cd2390b0d45 100644
--- a/net/x25/af_x25.c
+++ b/net/x25/af_x25.c
@@ -372,8 +372,7 @@ static void __x25_destroy_socket(struct sock *sk)
372 kfree_skb(skb); 372 kfree_skb(skb);
373 } 373 }
374 374
375 if (atomic_read(&sk->sk_wmem_alloc) || 375 if (sk_has_allocations(sk)) {
376 atomic_read(&sk->sk_rmem_alloc)) {
377 /* Defer: outstanding buffers */ 376 /* Defer: outstanding buffers */
378 sk->sk_timer.expires = jiffies + 10 * HZ; 377 sk->sk_timer.expires = jiffies + 10 * HZ;
379 sk->sk_timer.function = x25_destroy_timer; 378 sk->sk_timer.function = x25_destroy_timer;