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=-2.2 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_SANE_1 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 D25F7C43331 for ; Fri, 6 Sep 2019 09:40:01 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id B81FB2084F for ; Fri, 6 Sep 2019 09:40:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2404635AbfIFJkB (ORCPT ); Fri, 6 Sep 2019 05:40:01 -0400 Received: from mx2.suse.de ([195.135.220.15]:40994 "EHLO mx1.suse.de" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1726073AbfIFJkA (ORCPT ); Fri, 6 Sep 2019 05:40:00 -0400 X-Virus-Scanned: by amavisd-new at test-mx.suse.de Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 318F7AFC4; Fri, 6 Sep 2019 09:39:57 +0000 (UTC) Date: Fri, 6 Sep 2019 11:39:54 +0200 From: Petr Mladek To: Steven Rostedt Cc: Thomas Gleixner , Andrea Parri , Sergey Senozhatsky , Sergey Senozhatsky , Brendan Higgins , Peter Zijlstra , John Ogness , Linus Torvalds , Greg Kroah-Hartman , "contact@linuxplumbersconf.org" , TheodoreTs'o , linux-kernel@vger.kernel.org Subject: Re: [RFC PATCH v4 0/9] printk: new ringbuffer implementation Message-ID: <20190906093954.lgkxk23osd6blgmm@pathway.suse.cz> References: <20190807222634.1723-1-john.ogness@linutronix.de> <20190904123531.GA2369@hirez.programming.kicks-ass.net> <20190905130513.4fru6yvjx73pjx7p@pathway.suse.cz> <20190905143118.GP2349@hirez.programming.kicks-ass.net> <20190905121101.60c78422@oasis.local.home> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20190905121101.60c78422@oasis.local.home> User-Agent: NeoMutt/20170912 (1.9.0) Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Thu 2019-09-05 12:11:01, Steven Rostedt wrote: > > [ Added Ted and Linux Plumbers ] > > On Thu, 5 Sep 2019 17:38:21 +0200 (CEST) > Thomas Gleixner wrote: > > > On Thu, 5 Sep 2019, Peter Zijlstra wrote: > > > On Thu, Sep 05, 2019 at 03:05:13PM +0200, Petr Mladek wrote: > > > > The alternative lockless approach is still more complicated than > > > > the serialized one. But I think that it is manageable thanks to > > > > the simplified state tracking. And I might safe use some pain > > > > in the long term. > > > > > > I've not looked at it yet, sorry. But per the above argument of needing > > > the CPU serialization _anyway_, I don't see a compelling reason not to > > > use it. > > > > > > It is simple, it works. Let's use it. > > > > > > If you really fancy a multi-writer buffer, you can always switch to one > > > later, if you can convince someone it actually brings benefits and not > > > just head-aches. > > > > Can we please grab one of the TBD slots at kernel summit next week, sit > > down in a room and hash that out? > > > > We should definitely be able to find a room that will be available next > week. Sounds great. I am blocked only during Livepatching miniconference that is scheduled on Wednesday, Sep 11 at 15:00 (basically the very last slot). Best Regards, Petr