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 6B496C79FB7 for ; Wed, 9 Sep 2026 21:51:32 +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=DYuwB6DL5qoXxnem2Sh49UaLWIq/5mk6bF4glzH7dyA=; b=hZ6SQHbIOea+kOgS6QHDqfCVmH xhzZ60KXBBRVbgTit7P8V5PLU9paqI3/rqUVTaIyN7vRvpYMDMpZLuCfCARpmko+ytiZ5sAoUcHH0 eOwaUjA2DERz35LJJC1EmNz50krFA0w1VfmePYHRzVkqNcczfAJa/C35t9DcKqqgmd7QvnPNZKOhg rcON1sz93+qoliqNa1w9hAt0iU2eplf/eVgjNqI3j/K7TCSGXq1KPMWg4fUfkrkXvo9HVXJ68V8T8 Wlp+ZQAhRDdjFywkYiXGhwbH9WYxDIZYs2iofOLn9GsHijKFvjy5rTvjih55k1RthtAR8y+KYFWSC uUHczOow==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4QCT-0000000Cwlx-3MuD; Wed, 09 Sep 2026 21:51:25 +0000 Received: from casper.infradead.org ([2001:8b0:10b:1236::1]) by bombadil.infradead.org with esmtps (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4QCQ-0000000Cwl6-1Cdk for linux-arm-kernel@bombadil.infradead.org; Wed, 09 Sep 2026 21:51:24 +0000 DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; 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=DYuwB6DL5qoXxnem2Sh49UaLWIq/5mk6bF4glzH7dyA=; b=aWbMEsGXXdzPU/bx+iCtaVcm8e nRg2aqSvGS3f4uve5u3Ke2K4GEO+BE93YcSEFve6tsM7QLcgvDpPg/q4wx8Im5J1Mwy/pLJx9g9pS jgROHSedbRoJ6EqqhPXHI1qFLxlIskGJeoGXTY54fo+jKQfS0+MahJzA5uTyrrnLgFBuailVAOylH j5lGomeixCyu8vSf0Z7F8fv/bZnKXIKpVjv9gpFYYUPHPZ64RfMdnL6R67s/YIcx5SO50G4DOHDBy YJ40ynKuYYisOAFmRlgPyWKvxjM7E02SVl05cWmTFCWWpxZM2RoGW+A5qeplnqiXqgY8EPx2pCEpB mqjJlybg==; Received: from 77-249-17-252.cable.dynamic.v4.ziggo.nl ([77.249.17.252] helo=noisy.programming.kicks-ass.net) by casper.infradead.org with esmtpsa (Exim 4.99.1 #2 (Red Hat Linux)) id 1x4QCM-0000000A1ca-3w9W; Wed, 09 Sep 2026 21:51:19 +0000 Received: by noisy.programming.kicks-ass.net (Postfix, from userid 1000) id 016EE300A9A; Wed, 09 Sep 2026 23:51:17 +0200 (CEST) Date: Wed, 9 Sep 2026 23:51:17 +0200 From: Peter Zijlstra To: Will Deacon 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: <20260909215117.GO776954@noisy.programming.kicks-ass.net> 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: 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 04:36:01PM +0100, Will Deacon wrote: > 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. Yeah, Andrea is a wee bit fast with re-posting. I'll drop this, no worries.