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authorDavid S. Miller <davem@davemloft.net>2005-07-05 15:24:38 -0700
committerDavid S. Miller <davem@davemloft.net>2005-07-05 15:24:38 -0700
commitc1b4a7e69576d65efc31a8cea0714173c2841244 (patch)
tree92082532651cddc6f0649a9d7ca9ca63e381d310 /net/ipv6
parent0d9901df62fe4820aee86b49f1a074cdb5c6928e (diff)
downloadlinux-stericsson-c1b4a7e69576d65efc31a8cea0714173c2841244.tar.gz
[TCP]: Move to new TSO segmenting scheme.
Make TSO segment transmit size decisions at send time not earlier. The basic scheme is that we try to build as large a TSO frame as possible when pulling in the user data, but the size of the TSO frame output to the card is determined at transmit time. This is guided by tp->xmit_size_goal. It is always set to a multiple of MSS and tells sendmsg/sendpage how large an SKB to try and build. Later, tcp_write_xmit() and tcp_push_one() chop up the packet if necessary and conditions warrant. These routines can also decide to "defer" in order to wait for more ACKs to arrive and thus allow larger TSO frames to be emitted. A general observation is that TSO elongates the pipe, thus requiring a larger congestion window and larger buffering especially at the sender side. Therefore, it is important that applications 1) get a large enough socket send buffer (this is accomplished by our dynamic send buffer expansion code) 2) do large enough writes. Signed-off-by: David S. Miller <davem@davemloft.net>
Diffstat (limited to 'net/ipv6')
-rw-r--r--net/ipv6/tcp_ipv6.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/net/ipv6/tcp_ipv6.c b/net/ipv6/tcp_ipv6.c
index 9dac7fdf4726..f6e288dc116e 100644
--- a/net/ipv6/tcp_ipv6.c
+++ b/net/ipv6/tcp_ipv6.c
@@ -2018,7 +2018,7 @@ static int tcp_v6_init_sock(struct sock *sk)
*/
tp->snd_ssthresh = 0x7fffffff;
tp->snd_cwnd_clamp = ~0;
- tp->mss_cache_std = tp->mss_cache = 536;
+ tp->mss_cache = 536;
tp->reordering = sysctl_tcp_reordering;