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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4C671C79FB6 for ; Wed, 9 Sep 2026 15:36:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=xL4GWNyZy2EEYdBhSmnDddwtNaFG49DB7p0/uhH7nuA=; b=pYOCCzX8LrGswVl3z+RhyQM1+E /cavmAodVYhm7HT/Olelu3J4skkVnLoyw6lBwZeFVxssbZK2F1QZM+maGuMM0/eDD3aWzRo3tYgRG A/gKqjqhUMxvaZ9UXCE8x3tV86YH5yWZBay+k4ASC/TY7KfyRISC61La+dWlbt4GWux/fksRwfYl8 07QPNL/NVU0+cYLaNP+NJGpSwpyimpN7PORqvL9hjyIEyDrjo5HJ5fkeQEt10+Z6mc/vLs5OXzRKB 0xxJClolE+hhfJYyPRYlNpyom+0Y8TCx8if9NfoL37FdyzNmf11B0Og8Z7AcCtTRiHC7NYaJ1C1pE k26h85Iw==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4KLL-0000000CBjT-0oF4; Wed, 09 Sep 2026 15:36:11 +0000 Received: from tor.source.kernel.org ([172.105.4.254]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4KLJ-0000000CBj3-1EgO for linux-arm-kernel@lists.infradead.org; Wed, 09 Sep 2026 15:36:09 +0000 Received: from smtp.kernel.org (quasi.space.kernel.org [100.103.45.18]) by tor.source.kernel.org (Postfix) with ESMTP id 97825600CB; Wed, 9 Sep 2026 15:36:08 +0000 (UTC) Received: by smtp.kernel.org (Postfix) with ESMTPSA id 7527A1F00A3A; Wed, 9 Sep 2026 15:36:04 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel.org; s=k20260515; t=1788968168; bh=xL4GWNyZy2EEYdBhSmnDddwtNaFG49DB7p0/uhH7nuA=; h=Date:From:To:Cc:Subject:References:In-Reply-To; b=Md1ebTiocQTMrxL598KX8+yXuKfpi2/4t9URltTQztmgYTDkmpXWohsCheUd6M8n+ TCetYdf3jyIRwqDonImBJt7CVh5ix1jItm4hWLEABmfRVyHia67NHfxc3dPm8PzzHZ hoYnMJ2FwHjDldUl1z76houFfC/n+zftd1Uyl1CpBQFdfmDmb+1NtURXUEphvDTQkt 7YJzDYM5A2MdQND27l1lUalH+9VMWGz08GLswndGMgSSqOlZXwsb8oI/vnfrrvGJOw yIE86kDbAhAUhhV9YzXvX8nlh1ewMBtNYFg0k+nXikV05lrhFPE0Ydbt7L1GU9w66Y s0Auah+XgnIEg== Date: Wed, 9 Sep 2026 16:36:01 +0100 From: Will Deacon To: Peter Zijlstra Cc: Andrea Righi , Ingo Molnar , Juri Lelli , Vincent Guittot , Catalin Marinas , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Mark Rutland , Christian Loehle , Shrikanth Hegde , Phil Auld , Breno Leitao , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org Subject: Re: [PATCH v5 0/2] sched: Enable preferred SMT siblings on NVIDIA Olympus Message-ID: References: <20260909062649.469633-1-arighi@nvidia.com> <20260909131415.GB4120091@noisy.programming.kicks-ass.net> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260909131415.GB4120091@noisy.programming.kicks-ass.net> X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On Wed, Sep 09, 2026 at 03:14:15PM +0200, Peter Zijlstra wrote: > On Wed, Sep 09, 2026 at 08:26:07AM +0200, Andrea Righi wrote: > > > Andrea Righi (2): > > arm64: topology: Prefer PE0 on NVIDIA Olympus SMT cores > > sched/fair: Honor asymmetric SMT priority in idle selection > > > > arch/arm64/include/asm/topology.h | 1 + > > arch/arm64/kernel/smp.c | 1 + > > arch/arm64/kernel/topology.c | 51 +++++++++++++++++++++++ > > kernel/sched/fair.c | 85 +++++++++++++++++++++++++++++++-------- > > kernel/sched/sched.h | 6 +++ > > kernel/sched/topology.c | 36 +++++++++++++++++ > > 6 files changed, 163 insertions(+), 17 deletions(-) > > I tentatively picked these up, but I need an arm64 ack before I can > merge them, and ideally vingu will bless them too :-) We've had five versions of this in five minutes, but the arch code is pretty filthy tbh. Detecting topology based on MIDR is a non-starter, sorry. Will