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 87408C4332F for ; Wed, 8 Nov 2023 16:17:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229769AbjKHQRC (ORCPT ); Wed, 8 Nov 2023 11:17:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:60976 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229579AbjKHQRA (ORCPT ); Wed, 8 Nov 2023 11:17:00 -0500 Received: from desiato.infradead.org (desiato.infradead.org [IPv6:2001:8b0:10b:1:d65d:64ff:fe57:4e05]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id AFA74C6 for ; Wed, 8 Nov 2023 08:16:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=desiato.20200630; h=In-Reply-To:Content-Type:MIME-Version: References:Message-ID:Subject:Cc:To:From:Date:Sender:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description; bh=HQBcuS6yynl+Xfotv8WVzOrBYwQy2vL25amr6eMARVY=; b=h9bhuwShSjT5j1fkk4MZczqB8z HfLwgnd9msTJSp9dw2tR9kzySqbfyg7v3aN+xtjbR+/jp8jUAm1irqQuRR7Mnjd+4fw1WxSFmCWSG iTdn9D7DCqdl07LtkC4IKvTyG+dh18oTHkIFD5pY2ZVmzZIaOJJzOLD/QpTJdWClCinmaInGnOVEO 4SiRqxsBaHReCi9fBod7QUPljDBd2+9bPCoLON3h22BNT1CXB7k8HkC/kr/7NFaPbLoC9H4eL5UNv yjmQpKZ5Gen3NcmUI7JtV3ZlkCiImVYzbbjGudQyw69w6xKMg0BHLpEKJteoeHXvfqC64x5Guquu/ W8xzPniQ==; Received: from j130084.upc-j.chello.nl ([24.132.130.84] helo=noisy.programming.kicks-ass.net) by desiato.infradead.org with esmtpsa (Exim 4.96 #2 (Red Hat Linux)) id 1r0lDg-00DbhO-1v; Wed, 08 Nov 2023 16:15:56 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 4485030049D; Wed, 8 Nov 2023 17:15:56 +0100 (CET) Date: Wed, 8 Nov 2023 17:15:56 +0100 From: Peter Zijlstra To: Thomas Gleixner Cc: 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, rostedt@goodmis.org, David.Laight@aculab.com, richard@nod.at, mjguzik@gmail.com Subject: Re: [RFC PATCH 00/86] Make the kernel preemptible Message-ID: <20231108161556.GL3818@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> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <877cmsgsrg.ffs@tglx> Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wed, Nov 08, 2023 at 04:38:11PM +0100, Thomas Gleixner wrote: > No. The whole point of LAZY is to keep preempt_schedule(), > preempt_schedule_notrace(), irqentry_exit_cond_resched() always enabled. Yeah, I got that. What wasn't at all clear is that it also wanted to replace NONE. 0/n didn't even mention none.