From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from foss.arm.com (foss.arm.com [217.140.110.172]) by smtp.subspace.kernel.org (Postfix) with ESMTP id 9125B331EAE for ; Fri, 11 Sep 2026 14:11:43 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=217.140.110.172 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789135905; cv=none; b=JUpj/GQjq2pc3v2M58Ryzt2m64UIr16fmCMvNKgmbCkbXCcupSKJUIu2kFlGaJXwY+twNsIR0s6PnrPaJaClLu6pGQnb1Xdx8DK0IsGhXjCZFH4BwSRGXUwkNlyK8pplVo+lgKa0cxGrVzp1z6Io+6E6dcae3Kt96493oKVL99M= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789135905; c=relaxed/simple; bh=xWDRCpoj9WdBEt44L+2RNU/fKnJEuXhR5O1t04EL2RM=; h=Message-ID:Date:MIME-Version:Subject:To:Cc:References:From: In-Reply-To:Content-Type; b=gSvsRSShABBvvGtCab3emtRcpr0I8Hervzck0K/QFrEL7EtMUysbMm+yFs+feOltFU5l8c3C+/64u0szypJkfd2NKSjge+ldAj+iOtq24qwb/TtUuUalUcLZMQ2h+E29ja9v1bdjIL/BujXr5YZE3pU3nCpM4rKC+Kpett5bLdk= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com; spf=pass smtp.mailfrom=arm.com; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b=tohXVArB; arc=none smtp.client-ip=217.140.110.172 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=arm.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=arm.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=arm.com header.i=@arm.com header.b="tohXVArB" Received: from usa-sjc-imap-foss1.foss.arm.com (unknown [10.121.207.14]) by usa-sjc-mx-foss1.foss.arm.com (Postfix) with ESMTP id CBD7F16A3; Fri, 11 Sep 2026 07:11:38 -0700 (PDT) Received: from [10.57.73.19] (unknown [10.57.73.19]) by usa-sjc-imap-foss1.foss.arm.com (Postfix) with ESMTPSA id BE8CC3F7B4; Fri, 11 Sep 2026 07:11:39 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=arm.com; s=foss; t=1789135902; bh=xWDRCpoj9WdBEt44L+2RNU/fKnJEuXhR5O1t04EL2RM=; h=Date:Subject:To:Cc:References:From:In-Reply-To:From; b=tohXVArBKXDI653lw5Y93+F9TsGTSnLtrf7pLj0Ohcyc9b8lGL7yh5428aPO4vB2B wFYmgo+YfQpoXqkp92OBsMZviKrg6tzf/iISYqyiKLCC/AVkBQP+zb+Wy9chCKs0Vw 6q+wcSq6E6QIWi3Kb2ZDhCKF3uu+aOulSGpPvo3w= Message-ID: <1529268b-8e10-4fef-be6e-60b6dd1e74a0@arm.com> Date: Fri, 11 Sep 2026 16:11:38 +0200 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH 2/2] sched/fair: Honor asymmetric SMT priority in idle selection To: Andrea Righi , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Catalin Marinas , Will Deacon Cc: 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 References: <20260909062649.469633-1-arighi@nvidia.com> <20260909062649.469633-3-arighi@nvidia.com> Content-Language: en-GB From: Dietmar Eggemann In-Reply-To: <20260909062649.469633-3-arighi@nvidia.com> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 09.09.26 08:26, Andrea Righi wrote: [...] > +static bool has_asym_smt_domain(int cpu) > +{ > + struct sched_domain *sd; > + > + for_each_domain(cpu, sd) { > + if (!(sd->flags & SD_SHARE_CPUCAPACITY)) > + break; > + > + if (sd->flags & SD_ASYM_PACKING) > + return true; > + } > + > + return false; > +} Replace for_each_domain() w/ sd = rcu_dereference_all(cpu_rq(cpu)->sd) here as well? [...]