WLAN subsystem: Sysctl support for key TCP/IP parameters
It has been observed that default values for some of key tcp/ip
parameters are affecting the tput/performance of the system. Hence
extending configuration capabilities to TCP/Ip stack through
sysctl interface.
Change-Id: I0c99d5b50cbe0d6496e40d391eacc12b0c62dbed
CRs-Fixed: 507581
Signed-off-by: Mahesh A Saptasagar <msapta@codeaurora.org>
diff --git a/net/ipv4/tcp.c b/net/ipv4/tcp.c
index 74a286c..b2458f2 100644
--- a/net/ipv4/tcp.c
+++ b/net/ipv4/tcp.c
@@ -296,6 +296,11 @@
atomic_long_t tcp_memory_allocated; /* Current allocated memory. */
EXPORT_SYMBOL(tcp_memory_allocated);
+int sysctl_tcp_delack_seg __read_mostly = TCP_DELACK_SEG;
+EXPORT_SYMBOL(sysctl_tcp_delack_seg);
+
+int sysctl_tcp_use_userconfig __read_mostly;
+EXPORT_SYMBOL(sysctl_tcp_use_userconfig);
/*
* Current number of TCP sockets.
@@ -1213,8 +1218,11 @@
/* Delayed ACKs frequently hit locked sockets during bulk
* receive. */
if (icsk->icsk_ack.blocked ||
- /* Once-per-two-segments ACK was not sent by tcp_input.c */
- tp->rcv_nxt - tp->rcv_wup > icsk->icsk_ack.rcv_mss ||
+ /* Once-per-sysctl_tcp_delack_segments
+ * ACK was not sent by tcp_input.c
+ */
+ tp->rcv_nxt - tp->rcv_wup > (icsk->icsk_ack.rcv_mss) *
+ sysctl_tcp_delack_seg ||
/*
* If this read emptied read buffer, we send ACK, if
* connection is not bidirectional, user drained