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tcp: remove max_qlen_log

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This control variable was set at first listen(fd, backlog)
call, but not updated if application tried to increase or decrease
backlog. It made sense at the time listener had a non resizeable
hash table.

Also rounding to powers of two was not very friendly.

Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Eric Dumazet
2015-10-02 11:43:37 -07:00
committed by David S. Miller
parent 10cbc8f179
commit ef547f2ac1
4 changed files with 6 additions and 18 deletions
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4
net/ipv4/inet_connection_sock.c
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@@ -579,7 +579,7 @@ static void reqsk_timer_handler(unsigned long data)
* ones are about to clog our table.
*/
qlen = reqsk_queue_len(queue);
if (qlen >> (queue->max_qlen_log - 1)) {
if ((qlen << 1) > sk_listener->sk_max_ack_backlog) {
int young = reqsk_queue_len_young(queue) << 1;
while (thresh > 2) {
@@ -732,7 +732,7 @@ int inet_csk_listen_start(struct sock *sk, const int nr_table_entries)
struct inet_connection_sock *icsk = inet_csk(sk);
struct inet_sock *inet = inet_sk(sk);
reqsk_queue_alloc(&icsk->icsk_accept_queue, nr_table_entries);
reqsk_queue_alloc(&icsk->icsk_accept_queue);
sk->sk_max_ack_backlog = 0;
sk->sk_ack_backlog = 0;