From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 1A9B2C31E44 for ; Sat, 15 Jun 2019 03:18:43 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id E884621473 for ; Sat, 15 Jun 2019 03:18:42 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726327AbfFODSl (ORCPT ); Fri, 14 Jun 2019 23:18:41 -0400 Received: from shards.monkeyblade.net ([23.128.96.9]:58042 "EHLO shards.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726046AbfFODSl (ORCPT ); Fri, 14 Jun 2019 23:18:41 -0400 Received: from localhost (unknown [IPv6:2601:601:9f80:35cd::3d5]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (Client did not present a certificate) (Authenticated sender: davem-davemloft) by shards.monkeyblade.net (Postfix) with ESMTPSA id 0AED01426651D; Fri, 14 Jun 2019 20:18:41 -0700 (PDT) Date: Fri, 14 Jun 2019 20:18:40 -0700 (PDT) Message-Id: <20190614.201840.1535431493194799515.davem@davemloft.net> To: edumazet@google.com Cc: netdev@vger.kernel.org, willemb@google.com, feng.tang@intel.com, eric.dumazet@gmail.com Subject: Re: [PATCH net 0/4] tcp: add three static keys From: David Miller In-Reply-To: <20190614232221.248392-1-edumazet@google.com> References: <20190614232221.248392-1-edumazet@google.com> X-Mailer: Mew version 6.8 on Emacs 26.1 Mime-Version: 1.0 Content-Type: Text/Plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH, not delayed by milter-greylist-4.5.12 (shards.monkeyblade.net [149.20.54.216]); Fri, 14 Jun 2019 20:18:41 -0700 (PDT) Sender: netdev-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: netdev@vger.kernel.org From: Eric Dumazet Date: Fri, 14 Jun 2019 16:22:17 -0700 > Recent addition of per TCP socket rx/tx cache brought > regressions for some workloads, as reported by Feng Tang. > > It seems better to make them opt-in, before we adopt better > heuristics. > > The last patch adds high_order_alloc_disable sysctl > to ask TCP sendmsg() to exclusively use order-0 allocations, > as mm layer has specific optimizations. Series applied.