netdev - Re: [PATCH V2 net-next] tcp: increase size at which tcp_bound_to_half_wnd bounds to > TCP_MSS

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Date:	Thu, 30 Jun 2016 08:19:16 -0400 (EDT)
From:	David Miller <davem@...emloft.net>
To:	shane.seymour@....com
Cc:	netdev@...r.kernel.org, eric.dumazet@...il.com
Subject: Re: [PATCH V2 net-next] tcp: increase size at which
 tcp_bound_to_half_wnd bounds to > TCP_MSS_DEFAULT

From: "Seymour, Shane M" <shane.seymour@....com>
Date: Tue, 28 Jun 2016 23:06:48 +0000

> In previous commit 01f83d69844d307be2aa6fea88b0e8fe5cbdb2f4
> the following comments were added:
> 
> "When peer uses tiny windows, there is no use in packetizing to sub-MSS
> pieces for the sake of SWS or making sure there are enough packets in
> the pipe for fast recovery."
> 
> The test should be > TCP_MSS_DEFAULT not >= 512. This allows low end
> devices that send an MSS of 536 (TCP_MSS_DEFAULT) to see better network
> performance by sending it 536 bytes of data at a time instead of bounding
> to half window size (268). Other network stacks work this way, e.g. HP-UX.
> 
> Signed-off-by: Shane Seymour <shane.seymour@....com>

Applied.