From mboxrd@z Thu Jan 1 00:00:00 1970 From: Eric Dumazet Subject: Re: [PATCH 1/1] net: Add SO_REUSEPORT_LISTEN_OFF socket option as drain mode Date: Tue, 10 Nov 2015 22:19:29 -0800 Message-ID: <1447222769.17135.92.camel@edumazet-glaptop2.roam.corp.google.com> References: <1443313848-751-1-git-send-email-tolga.ceylan@gmail.com> <877fnc7i0i.fsf@bytheb.org> <1443320655.3273.7.camel@edumazet-glaptop2.roam.corp.google.com> Mime-Version: 1.0 Content-Type: text/plain; charset="UTF-8" Content-Transfer-Encoding: 7bit Cc: Tolga Ceylan , Aaron Conole , "David S. Miller" , Linux Kernel Network Developers To: Tom Herbert Return-path: Received: from mail-pa0-f48.google.com ([209.85.220.48]:35781 "EHLO mail-pa0-f48.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1750714AbbKKGTc (ORCPT ); Wed, 11 Nov 2015 01:19:32 -0500 Received: by pasz6 with SMTP id z6so22544716pas.2 for ; Tue, 10 Nov 2015 22:19:32 -0800 (PST) In-Reply-To: Sender: netdev-owner@vger.kernel.org List-ID: On Tue, 2015-11-10 at 21:41 -0800, Tom Herbert wrote: > Tolga, are you still planning to respin this patch (when tree opens?) I was planning to add an union on skc_tx_queue_mapping and sk_max_ack_backlog, so that adding a check on sk_max_ack_backlog in listener lookup would not add an additional cache line miss. This would remove false sharing because sk_ack_backlog is often dirtied when a socket is added into accept queue.