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Forced commit to provide the correct commit message to r242251:

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Defer sending an independent window update if a delayed ACK is pending
  saving a packet.  The window update then gets piggy-backed on the next
  already scheduled ACK.

Added grammar fixes as well.

MFC after:	2 weeks
This commit is contained in:
Andre Oppermann 2012-10-29 13:16:33 +00:00
parent e8ad36aba4
commit 78f59b4bfd
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=242311
1 changed files with 3 additions and 3 deletions
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6
sys/netinet/tcp_output.c
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@ -547,13 +547,13 @@ tcp_output(struct tcpcb *tp)
/* /*
* Sending of standalone window updates. * Sending of standalone window updates.
* *
* Window updates important when we close our window due to a full * Window updates are important when we close our window due to a
* socket buffer and are opening it again after the application * full socket buffer and are opening it again after the application
* reads data from it. Once the window has opened again and the * reads data from it. Once the window has opened again and the
* remote end starts to send again the ACK clock takes over and * remote end starts to send again the ACK clock takes over and
* provides the most current window information. * provides the most current window information.
* *
* We must avoid to the silly window syndrome whereas every read * We must avoid the silly window syndrome whereas every read
* from the receive buffer, no matter how small, causes a window * from the receive buffer, no matter how small, causes a window
* update to be sent. We also should avoid sending a flurry of * update to be sent. We also should avoid sending a flurry of
* window updates when the socket buffer had queued a lot of data * window updates when the socket buffer had queued a lot of data