From: Roman Kapl <roman.k...@sysgo.com> Date: Wed, 24 May 2017 10:22:22 +0200
> The default value for somaxconn is set in sysctl_core_net_init(), but this > function is not called when kernel is configured without CONFIG_SYSCTL. > > This results in the kernel not being able to accept TCP connections, > because the backlog has zero size. Usually, the user ends up with: > "TCP: request_sock_TCP: Possible SYN flooding on port 7. Dropping request. > Check SNMP counters." > If SYN cookies are not enabled the connection is rejected. > > Before ef547f2ac16 (tcp: remove max_qlen_log), the effects were less > severe, because the backlog was always at least eight slots long. > > Signed-off-by: Roman Kapl <roman.k...@sysgo.com> This looks better, applied, thanks.
