Date: Wed, 28 May 2003 15:19:18 -0400 (EDT) From: Garrett Wollman <wollman@lcs.mit.edu> To: Igor Sysoev <is@rambler-co.ru> Cc: freebsd-net@freebsd.org Subject: Re: turning off TCP_NOPUSH Message-ID: <200305281919.h4SJJI5h050586@khavrinen.lcs.mit.edu> In-Reply-To: <Pine.BSF.4.21.0305282221390.51226-100000@is> References: <200305281607.h4SG7SwR049542@khavrinen.lcs.mit.edu> <Pine.BSF.4.21.0305282221390.51226-100000@is>
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<<On Wed, 28 May 2003 22:22:14 +0400 (MSD), Igor Sysoev <is@rambler-co.ru> said: > As I understand if the data in the send buffer is bigger than MSS it means > that TCP stack has some reason not to send it and this reason is not > TF_NOPUSH flag. Am I wrong ? If TCP is for some reason prohibited from sending (i.e., the flow control or congestion control is closed), then tcp_output() will do nothing (except perhaps send a window update if necessary). If TCP is allowed to send data, then tcp_output() will send the data immediately, which is what we want. -GAWollman
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