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authorEric Dumazet <edumazet@google.com>2015-03-19 19:04:21 -0700
committerDavid S. Miller <davem@davemloft.net>2015-03-20 12:40:25 -0400
commitbecb74f0acca19b5abfcb24dc602530f3deea66a (patch)
tree1c688749f3b5570f62245a7bb317c94f4af43a80 /net/core/sysctl_net_core.c
parentfa76ce7328b289b6edd476e24eb52fd634261720 (diff)
net: increase sk_[max_]ack_backlog
sk_ack_backlog & sk_max_ack_backlog were 16bit fields, meaning listen() backlog was limited to 65535. It is time to increase the width to allow much bigger backlog, if admins change /proc/sys/net/core/somaxconn & /proc/sys/net/ipv4/tcp_max_syn_backlog default values. Tested: echo 5000000 >/proc/sys/net/core/somaxconn echo 5000000 >/proc/sys/net/ipv4/tcp_max_syn_backlog Ran a SYNFLOOD test against a listener using listen(fd, 5000000) myhost~# grep request_sock_TCP /proc/slabinfo request_sock_TCP 4185642 4411940 304 13 1 : tunables 54 27 8 : slabdata 339380 339380 0 Signed-off-by: Eric Dumazet <edumazet@google.com> Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/core/sysctl_net_core.c')
-rw-r--r--net/core/sysctl_net_core.c2
1 files changed, 0 insertions, 2 deletions
diff --git a/net/core/sysctl_net_core.c b/net/core/sysctl_net_core.c
index 433424804284..e1c85db5216f 100644
--- a/net/core/sysctl_net_core.c
+++ b/net/core/sysctl_net_core.c
@@ -24,7 +24,6 @@
static int zero = 0;
static int one = 1;
-static int ushort_max = USHRT_MAX;
static int net_msg_warn; /* Unused, but still a sysctl */
@@ -401,7 +400,6 @@ static struct ctl_table netns_core_table[] = {
.maxlen = sizeof(int),
.mode = 0644,
.extra1 = &zero,
- .extra2 = &ushort_max,
.proc_handler = proc_dointvec_minmax
},
{ }