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 93551C0018C for ; Wed, 8 Nov 2023 09:53:44 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1344036AbjKHJxo (ORCPT ); Wed, 8 Nov 2023 04:53:44 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:36190 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1344001AbjKHJxk (ORCPT ); Wed, 8 Nov 2023 04:53:40 -0500 Received: from smtp.kernel.org (relay.kernel.org [52.25.139.140]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 2DAE31BB for ; Wed, 8 Nov 2023 01:53:38 -0800 (PST) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 3E383C433C9; Wed, 8 Nov 2023 09:53:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=k20201202; t=1699437217; bh=X1QfPsk6/FLpLtKsEI/zWg5ToEpPgmfoGfnmPEqLETI=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=r03aAzwK8u8Iu4RbZUbQE9MLoKo0DZp6ST+mkNjJY88sj7bB+2v0IItQLxdu4ZlNG Buo1PG+41i9omssomgoaPld5szeOn4Q/ic4fb+xIFNwe88mvFcuY4yJiTXAZvIHhPE jzVtVb1AsRLUyS518rATQSATi/weHa1vvi+vA+VW9Vaiygwpxf3ACx8oSs04lU4zC2 /6NBYhcTbsL7/2LG4jnQb2gFvdzY4Zgrc8zYWV651KjBg/HLgyIa5KMR3bAdhK0gg0 Tfr51PEPmXZTAX65VYmVl8hE0qi9GhdS2QwhQWkK84vjlV6sO3L+13hn+5TbT1ST3Z 7coCu8vgn/PJA== Message-ID: Date: Wed, 8 Nov 2023 10:53:27 +0100 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [RFC PATCH 00/86] Make the kernel preemptible To: Peter Zijlstra , Ankur Arora Cc: linux-kernel@vger.kernel.org, tglx@linutronix.de, 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, 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 References: <20231107215742.363031-1-ankur.a.arora@oracle.com> <20231108085156.GD8262@noisy.programming.kicks-ass.net> Content-Language: en-US, pt-BR, it-IT From: Daniel Bristot de Oliveira In-Reply-To: <20231108085156.GD8262@noisy.programming.kicks-ass.net> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On 11/8/23 09:51, Peter Zijlstra wrote: > On Tue, Nov 07, 2023 at 01:56:46PM -0800, Ankur Arora wrote: >> Hi, >> >> We have two models of preemption: voluntary and full > 3, also none (RT is not actually a preemption model). > >> (and RT which is >> a fuller form of full preemption.) > It is not in fact a different preemption model, it is the same full > preemption, the difference with RT is that it makes a lot more stuff > preemptible, but the fundamental preemption model is the same -- full. +1 -- Daniel