netdev - RE: [PATCHv6 net-next 20/31] iw_cxgb4: adjust tcp snd/rcv window based on link speed

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Message-ID: <008801cf3e2e$d8679b00$8936d100$@opengridcomputing.com>
Date:	Wed, 12 Mar 2014 15:08:33 -0500
From:	"Steve Wise" <swise@...ngridcomputing.com>
To:	"'David Miller'" <davem@...emloft.net>, <hariprasad@...lsio.com>
Cc:	<netdev@...r.kernel.org>, <linux-rdma@...r.kernel.org>,
	<roland@...estorage.com>, <dm@...lsio.com>, <leedom@...lsio.com>,
	<santosh@...lsio.com>, <kumaras@...lsio.com>,
	<nirranjan@...lsio.com>
Subject: RE: [PATCHv6 net-next 20/31] iw_cxgb4: adjust tcp snd/rcv window based on link speed

> > Added module option named adjust_win, defaulted to 1, that allows
> > disabling the 40G window bump.  This allows a user to specify the exact
> > default window sizes via module options snd_win and rcv_win.
> 
> This is terrible.  As is the existing other TCP tweaking module
> parameters.
> 
> You can just use the TCP settings the kernel already provides for
> the real TCP stack.

Do you mean use sysctl_tcp_*mem, sysctl_tcp_timestamps, sysctl_tcp_window_scaling, etc?
I'll look into this.  

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