Gitweb:     
http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=371fe7779cad6557a58df9a1b5543652e067400f
Commit:     371fe7779cad6557a58df9a1b5543652e067400f
Parent:     9bf17475eb658a920125bd8f05edf9c57c2dd950
Author:     Gerrit Renker <[EMAIL PROTECTED]>
AuthorDate: Tue Mar 20 14:28:44 2007 -0300
Committer:  David S. Miller <[EMAIL PROTECTED]>
CommitDate: Wed Apr 25 22:26:49 2007 -0700

    [CCID3]: Use MSS for larger initial windows
    
    This improves the slow-start phase by using the MSS
    (as suggested in RFC 4342, sec. 5) instead of the packet size s.
    Also figured out that __u32 is ample resource enough.
    
    After applying, I got the following in the logs:
    
      ccid3_hc_tx_packet_recv: client(f7421700), s=6, MSS=1424, w_init=4380, 
R_sample=176us, X=24886363
    
    Had the previous variant been used, w_init would have been as low as 24.
    
    Committer note: removed unneeded cast to unsigned long long that was
                    causing a compiler warning on 64bit architectures.
    
    Signed-off-by: Gerrit Renker <[EMAIL PROTECTED]>
    Acked-by: Ian McDonald <[EMAIL PROTECTED]>
    Signed-off-by: Arnaldo Carvalho de Melo <[EMAIL PROTECTED]>
    Signed-off-by: David S. Miller <[EMAIL PROTECTED]>
---
 net/dccp/ccids/ccid3.c |   10 +++++-----
 1 files changed, 5 insertions(+), 5 deletions(-)

diff --git a/net/dccp/ccids/ccid3.c b/net/dccp/ccids/ccid3.c
index 0009b39..52dae40 100644
--- a/net/dccp/ccids/ccid3.c
+++ b/net/dccp/ccids/ccid3.c
@@ -466,20 +466,20 @@ static void ccid3_hc_tx_packet_recv(struct sock *sk, 
struct sk_buff *skb)
                if (hctx->ccid3hctx_state == TFRC_SSTATE_NO_FBACK) {
                        /*
                         * Larger Initial Windows [RFC 4342, sec. 5]
-                        * We deviate in that we use `s' instead of `MSS'.
                         */
-                       __u64 w_init = min(4 * hctx->ccid3hctx_s,
-                                          max(2 * hctx->ccid3hctx_s, 4380));
+                       __u32 w_init = min(4 * dp->dccps_mss_cache,
+                                          max(2 * dp->dccps_mss_cache, 4380U));
                        hctx->ccid3hctx_rtt  = r_sample;
                        hctx->ccid3hctx_x    = scaled_div(w_init << 6, 
r_sample);
                        hctx->ccid3hctx_t_ld = now;
 
                        ccid3_update_send_time(hctx);
 
-                       ccid3_pr_debug("%s(%p), s=%u, w_init=%llu, "
+                       ccid3_pr_debug("%s(%p), s=%u, MSS=%u, w_init=%u, "
                                       "R_sample=%dus, X=%u\n", dccp_role(sk),
                                       sk, hctx->ccid3hctx_s,
-                                      (unsigned long long)w_init,
+                                      dp->dccps_mss_cache,
+                                      w_init,
                                       (int)r_sample,
                                       (unsigned)(hctx->ccid3hctx_x >> 6));
 
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