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tcp: move qlen/young out of struct listen_sock

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qlen_inc & young_inc were protected by listener lock,
while qlen_dec & young_dec were atomic fields.

Everything needs to be atomic for upcoming lockless listener.

Also move qlen/young in request_sock_queue as we'll get rid
of struct listen_sock eventually.

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 11:43:24 -07:00 • committed by David S. Miller
parent fff1f3001c
commit aac065c50a
4 changed files with 18 additions and 38 deletions
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6
net/ipv4/inet_connection_sock.c
View file

@ -640,9 +640,9 @@ static void reqsk_timer_handler(unsigned long data)
* embrions; and abort old ones without pity, if old
* ones are about to clog our table.
*/
qlen = listen_sock_qlen(lopt);
qlen = reqsk_queue_len(queue);
if (qlen >> (lopt->max_qlen_log - 1)) {
int young = listen_sock_young(lopt) << 1;
int young = reqsk_queue_len_young(queue) << 1;
while (thresh > 2) {
if (qlen < young)
@ -664,7 +664,7 @@ static void reqsk_timer_handler(unsigned long data)
unsigned long timeo;
if (req->num_timeout++ == 0)
atomic_inc(&lopt->young_dec);
atomic_dec(&queue->young);
timeo = min(TCP_TIMEOUT_INIT << req->num_timeout, TCP_RTO_MAX);
mod_timer_pinned(&req->rsk_timer, jiffies + timeo);
return;