From mboxrd@z Thu Jan 1 00:00:00 1970 From: Nivedita Singhvi Subject: Re: [PATCH] tcp: Increment of LINUX_MIB_LISTENOVERFLOWS in tcp_v4_conn_request() Date: Thu, 24 Jan 2013 23:41:54 -0800 Message-ID: <51023742.2000908@gmail.com> References: <1359097408-9786-1-git-send-email-niv@us.ibm.com> Mime-Version: 1.0 Content-Type: text/plain; charset=ISO-8859-1 Content-Transfer-Encoding: 7bit Cc: netdev@vger.kernel.org, David Miller , Leandro Lucarella , Nivedita Singhvi To: Vijay Subramanian Return-path: Received: from mail-ie0-f182.google.com ([209.85.223.182]:48065 "EHLO mail-ie0-f182.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751175Ab3AYHmA (ORCPT ); Fri, 25 Jan 2013 02:42:00 -0500 Received: by mail-ie0-f182.google.com with SMTP id s9so11991iec.13 for ; Thu, 24 Jan 2013 23:42:00 -0800 (PST) In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On 01/24/2013 11:29 PM, Vijay Subramanian wrote: > On 24 January 2013 23:03, Nivedita Singhvi wrote: >> We drop a connection request if the accept backlog, syn queue are full when processing reaches tcp_v4_conn_request(). Increment the appropriate counter so this isn't silent, for accurate stats and help in debugging. >> > > Commit message seems misleading. syn queue is not really full at this > point. It just has more than enough entries. Er, good point. I should have said "sufficiently full" or "warm enough to warrant starting drops" - hope I'm not confusing things further, am I? DaveM, would you like me to resend, if you're picking this up? thanks, Nivedita