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 Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 803C8C4167B for ; Wed, 8 Nov 2023 17:18:19 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232641AbjKHRSU (ORCPT ); Wed, 8 Nov 2023 12:18:20 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:33828 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232401AbjKHRSS (ORCPT ); Wed, 8 Nov 2023 12:18:18 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 783AB1FDF for ; Wed, 8 Nov 2023 09:18:16 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 85959C433C8; Wed, 8 Nov 2023 17:18:12 +0000 (UTC) Date: Wed, 8 Nov 2023 12:18:16 -0500 From: Steven Rostedt To: Peter Zijlstra Cc: Thomas Gleixner , Ankur Arora , linux-kernel@vger.kernel.org, torvalds@linux-foundation.org, paulmck@kernel.org, linux-mm@kvack.org, x86@kernel.org, akpm@linux-foundation.org, luto@kernel.org, bp@alien8.de, dave.hansen@linux.intel.com, hpa@zytor.com, mingo@redhat.com, juri.lelli@redhat.com, vincent.guittot@linaro.org, willy@infradead.org, mgorman@suse.de, jon.grimm@amd.com, bharata@amd.com, raghavendra.kt@amd.com, boris.ostrovsky@oracle.com, konrad.wilk@oracle.com, jgross@suse.com, andrew.cooper3@citrix.com, mingo@kernel.org, bristot@kernel.org, mathieu.desnoyers@efficios.com, geert@linux-m68k.org, glaubitz@physik.fu-berlin.de, anton.ivanov@cambridgegreys.com, mattst88@gmail.com, krypton@ulrich-teichert.org, David.Laight@aculab.com, richard@nod.at, mjguzik@gmail.com Subject: Re: [RFC PATCH 00/86] Make the kernel preemptible Message-ID: <20231108121816.28eebfd5@gandalf.local.home> In-Reply-To: <20231108164916.GR8262@noisy.programming.kicks-ass.net> References: <20231107215742.363031-1-ankur.a.arora@oracle.com> <20231108085156.GD8262@noisy.programming.kicks-ass.net> <87bkc4lfxp.fsf@oracle.com> <20231108101330.GK3818@noisy.programming.kicks-ass.net> <877cmsgsrg.ffs@tglx> <20231108112227.62f0c5a8@gandalf.local.home> <20231108164916.GR8262@noisy.programming.kicks-ass.net> X-Mailer: Claws Mail 3.19.1 (GTK+ 2.24.33; x86_64-pc-linux-gnu) MIME-Version: 1.0 Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, 8 Nov 2023 17:49:16 +0100 Peter Zijlstra wrote: > On Wed, Nov 08, 2023 at 11:22:27AM -0500, Steven Rostedt wrote: > > > Peter, how can you say we can get rid of cond_resched() in NONE when you > > Because that would fix none to actually be none. Who cares. Well, that would lead to regressions with PREEMPT_NONE and the watchdog timer. > > > > Look at my PoC: https://lore.kernel.org/lkml/87jzshhexi.ffs@tglx/ > > > > And I've been saying that many times already ;-) > > Why should I look at random patches on the interweb to make sense of > these patches here? I actually said it to others, this wasn't really supposed to be addressed to you. > > That just underlines these here patches are not making sense. It's a complex series, and there's a lot of room for improvement. I'm happy to help out here. -- Steve