David Miller wrote:
From: Alex Sidorenko <[EMAIL PROTECTED]>
Date: Fri, 2 Mar 2007 15:21:58 -0500
they told us that they use small rcvbuf to throttle bandwidth for this
application. I explained it would be better to use TC for this purpose. They
agreed and will probably redesign their application in the future, but they
cannot do it right now. For the same reason they have to use the old 2.4.20
for a while - in big companies the important production software cannot be
changed quickly.
The fix I suggested is trivial and should have no impact the case of
rcvfbuf>mtu, so I think it makes sense to include it in upstream kernel.
I have no objection to the fix, especially John's version.
I was just curious about the app, thanks for the info :)
Please don't apply the patch I sent. I've been thinking about this a
bit harder, and it may not fix this particular problem. (Hard to say
without knowing exactly what it is.) As the comment above
__tcp_select_window() states, we do not do full receive-side SWS
avoidance because of header prediction.
Alex, you're right I missed that special zero-window case. I'm still
not quite sure I'm completely happy with this patch. I'd like to think
about this a little bit harder...
Thanks,
-John
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