From mboxrd@z Thu Jan 1 00:00:00 1970 From: "David S. Miller" Subject: Re: [PATCH] unclamp tcp receive window if doing dynamic receive sizing Date: Mon, 7 Jun 2004 16:17:41 -0700 Sender: netdev-bounce@oss.sgi.com Message-ID: <20040607161741.1f295aca.davem@redhat.com> References: <20040607133056.5ab9e72d@dell_ss3.pdx.osdl.net> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Cc: netdev@oss.sgi.com Return-path: To: Stephen Hemminger In-Reply-To: <20040607133056.5ab9e72d@dell_ss3.pdx.osdl.net> Errors-to: netdev-bounce@oss.sgi.com List-Id: netdev.vger.kernel.org On Mon, 7 Jun 2004 13:30:56 -0700 Stephen Hemminger wrote: > When running tests over higher speed links, the new 2.6 Dynamic Receiver Sizing > code doesn't increase the window large enough. The problem is that the window > clamp restricts the allowed window to the socket receive buffer size (85k) > > Easiest fix is to not restrict window clamp if we want to dynamic receiver stuff. > This is what web100 did. > > Thanks to John Heffner for finding this. This turns off all tcp_app_win semantics, are you sure that tcp_app_win makes no sense when doing dynamic receive buffer sizing? I think we should still factor it in, perhaps dynamically, during rcvbuf growth.