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=-0.7 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED autolearn=no 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 88239C433E0 for ; Wed, 17 Jun 2020 12:01:38 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 69C972082F for ; Wed, 17 Jun 2020 12:01:38 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726282AbgFQMBi (ORCPT ); Wed, 17 Jun 2020 08:01:38 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726271AbgFQMBh (ORCPT ); Wed, 17 Jun 2020 08:01:37 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AB843C061573 for ; Wed, 17 Jun 2020 05:01:37 -0700 (PDT) Received: from bigeasy by Galois.linutronix.de with local (Exim 4.80) (envelope-from ) id 1jlWl5-00008R-PH; Wed, 17 Jun 2020 14:01:35 +0200 Date: Wed, 17 Jun 2020 14:01:35 +0200 From: Sebastian Andrzej Siewior To: Marcelo Tosatti Cc: linux-rt-users@vger.kernel.org, Juri Lelli , Thomas Gleixner , Frederic Weisbecker Subject: Re: [patch 2/2] mm: page_alloc: drain pages remotely Message-ID: <20200617120135.s6ze2qa7yjrzqyxy@linutronix.de> References: <20200616161149.392213902@fuller.cnet> <20200616161409.299575008@fuller.cnet> <20200616163248.z5bdrx7gj2sf7d3m@linutronix.de> <20200616165536.GA306273@fuller.cnet> <20200617074223.wtd5lsxbpvqvbxs7@linutronix.de> <20200617101136.GA392445@fuller.cnet> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20200617101136.GA392445@fuller.cnet> Sender: linux-rt-users-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-rt-users@vger.kernel.org On 2020-06-17 07:11:36 [-0300], Marcelo Tosatti wrote: > If your application busy-spins with DPDK (such as FlexRAN does): > > https://www.slideshare.net/LuminaNetworks/osn-bay-area-feb-2019-meetup-intel-5g-flexran-solution-131647692 I see. > Then v5.8-rc1 does not work, right? (remote pagevec locking + remote > draining would be necessary). No, it is what we have in latest rt-devel: A per-CPU spinlock replacement for preempt_disable() on CONFIG_PREEMPT_RT. We use the schedule_work_on() as mainline does. Sebastian