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| author | Eric Dumazet <edumazet@google.com> | 2015-10-06 14:49:58 -0700 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2015-10-07 05:08:58 -0700 |
| commit | acb4a6bfc80ddeea4c44074dd630f916259e909e (patch) | |
| tree | c7745772d9dac017daf2754ed3e46be9149d7659 /net/ipv4/inet_connection_sock.c | |
| parent | 686a562449af96a0e8c18c6f1b87b47ff8c36de8 (diff) | |
| download | linux-acb4a6bfc80ddeea4c44074dd630f916259e909e.tar.gz linux-acb4a6bfc80ddeea4c44074dd630f916259e909e.tar.bz2 linux-acb4a6bfc80ddeea4c44074dd630f916259e909e.zip | |
tcp: ensure prior synack rtx behavior with small backlogs
Some applications use a listen() backlog of 1.
Prior kernels were silently enforcing a qlen_log of 4, so that we were
sending up to /proc/sys/net/ipv4/tcp_synack_retries SYNACK messages.
Fixes: ef547f2ac16b ("tcp: remove max_qlen_log")
Signed-off-by: Eric Dumazet <edumazet@google.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv4/inet_connection_sock.c')
| -rw-r--r-- | net/ipv4/inet_connection_sock.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv4/inet_connection_sock.c b/net/ipv4/inet_connection_sock.c index 89eedfbd4ad5..514b9e910bd4 100644 --- a/net/ipv4/inet_connection_sock.c +++ b/net/ipv4/inet_connection_sock.c @@ -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 << 1) > sk_listener->sk_max_ack_backlog) { + if ((qlen << 1) > max(8U, sk_listener->sk_max_ack_backlog)) { int young = reqsk_queue_len_young(queue) << 1; while (thresh > 2) { |