From: Herbert Xu <[EMAIL PROTECTED]>
Date: Thu, 20 Dec 2007 22:00:12 +0800

> On Thu, Dec 20, 2007 at 04:00:37AM -0800, David Miller wrote:
> >
> > In the most ideal sense, tcp_window_allows() should probably
> > be changed to only return MSS multiples.
> > 
> > Unfortunately this would add an expensive modulo operation,
> > however I think it would elimiate this problem case.
> 
> Well you only have to divide in the unlikely case of us being
> limited by the receiver window.  In that case speed is probably
> not of the essence anyway.

Agreed, to some extent.

I say "to some extent" because it might be realistic, with
lots (millions) of sockets to hit this case a lot.

There are so many things that are a "don't care" performance
wise until you have a lot of stinky connections over crappy
links.
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