From nobody Sun Feb 8 00:39:01 2026 Received: from galois.linutronix.de (Galois.linutronix.de [193.142.43.55]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id B316871ECC; Wed, 28 Feb 2024 22:00:13 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=193.142.43.55 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709157615; cv=none; b=ZW0AngxJ5JRkrtyX3T1oNZhvJ+8G26apL4xANHzs8Md9ETzMcDpe89OBJFkarFyVGjES+3jXejOXtd2+LTlknrtM4jd09joatFzsHh0EWf/hGB/Y7uJaWQO7xIOuFa+jIFGdODk2Pz8daRJ/5eQ2wJRWxqEG1xAVLbeQLe5IYMI= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1709157615; c=relaxed/simple; bh=5lp/NbP0ANQPeyEBDi8R6ySWbCPdnYiNPagn3a2OrXg=; h=Date:From:To:Subject:Cc:In-Reply-To:References:MIME-Version: Message-ID:Content-Type; b=oINlvOnI94dvTXIcsVzmtTTCfre5cT5HH8mUXSiUUpyT548vc58+MZY0qqmxJi57/06oJHXwk32UgZ5zYXiw0uCbH5xhLH6fbHbJ+UEA069Yw9lsh8PgDHBBCPCr7JEC0TPsIdWXYs6YoDUuxdyLStUYhL9+SC8rBz8j44dbU+c= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de; spf=pass smtp.mailfrom=linutronix.de; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=2XjEvsDu; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b=/UrAq7Cp; arc=none smtp.client-ip=193.142.43.55 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=linutronix.de Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=linutronix.de Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="2XjEvsDu"; dkim=permerror (0-bit key) header.d=linutronix.de header.i=@linutronix.de header.b="/UrAq7Cp" Date: Wed, 28 Feb 2024 22:00:05 -0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020; t=1709157606; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/w85MqrNq8SXh7VO2a1H8eeiPa+skP+jL4mSuCxESp0=; b=2XjEvsDuZuUkPG0JCa2UDvEWltCmaedRNWWJezG1K6e86l8DfA2bMpJHfHtURrHX8/z1LP PjgJJZrgQJijjpRTyQL4bLNjiKSgAsihJVpGKoNsksjVtGtBt1WrCISblxjY8SjtyPFGIC AZMW5y7O0zS4wKIKV5IIK2lDEg9CPn3LPGl5j7shINGqCG99VuhGpm0tsgFyqIWw7sokaq /8iC2AZaGMf40DRJWPBuibh33B076+daxD3sFHfFE+kNUZacF8qYaCxFR+RCMJ8R5P7E0T dxuRX4kcR5Nu84bA9NqifpxxdTrE6rz1aMx3qLdsNBS6qPtpVuVEe3nj5CJ4Nw== DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=linutronix.de; s=2020e; t=1709157606; h=from:from:sender:sender:reply-to:reply-to:subject:subject:date:date: message-id:message-id:to:to:cc:cc:mime-version:mime-version: content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/w85MqrNq8SXh7VO2a1H8eeiPa+skP+jL4mSuCxESp0=; b=/UrAq7Cp3IFcrKie38X+dy7ZmORusp3It1r5azeD8mBpd6CqnGITWJODurHMHJErgoPTZU Uj3PeHJdeg8Fq7DQ== From: "tip-bot2 for Alex Shi" Sender: tip-bot2@linutronix.de Reply-to: linux-kernel@vger.kernel.org To: linux-tip-commits@vger.kernel.org Subject: [tip: sched/core] sched/fair: Check the SD_ASYM_PACKING flag in sched_use_asym_prio() Cc: Alex Shi , Ingo Molnar , Ricardo Neri , Vincent Guittot , x86@kernel.org, linux-kernel@vger.kernel.org In-Reply-To: <20240210113924.1130448-4-alexs@kernel.org> References: <20240210113924.1130448-4-alexs@kernel.org> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-ID: <170915760555.398.490945038019686205.tip-bot2@tip-bot2> Robot-ID: Robot-Unsubscribe: Contact to get blacklisted from these emails Precedence: bulk Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable The following commit has been merged into the sched/core branch of tip: Commit-ID: fbc449864e0d2ee2c16f3af2d1e9093b9b8d7ad0 Gitweb: https://git.kernel.org/tip/fbc449864e0d2ee2c16f3af2d1e9093b9= b8d7ad0 Author: Alex Shi AuthorDate: Sat, 10 Feb 2024 19:39:22 +08:00 Committer: Ingo Molnar CommitterDate: Wed, 28 Feb 2024 15:43:17 +01:00 sched/fair: Check the SD_ASYM_PACKING flag in sched_use_asym_prio() sched_use_asym_prio() checks whether CPU priorities should be used. It makes sense to check for the SD_ASYM_PACKING() inside the function. Since both sched_asym() and sched_group_asym() use sched_use_asym_prio(), remove the now superfluous checks for the flag in various places. Signed-off-by: Alex Shi Signed-off-by: Ingo Molnar Tested-by: Ricardo Neri Reviewed-by: Ricardo Neri Reviewed-by: Vincent Guittot Link: https://lore.kernel.org/r/20240210113924.1130448-4-alexs@kernel.org --- kernel/sched/fair.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 475e2ca..39781a6 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -9744,6 +9744,9 @@ group_type group_classify(unsigned int imbalance_pct, */ static bool sched_use_asym_prio(struct sched_domain *sd, int cpu) { + if (!(sd->flags & SD_ASYM_PACKING)) + return false; + if (!sched_smt_active()) return true; =20 @@ -9937,11 +9940,9 @@ static inline void update_sg_lb_stats(struct lb_env = *env, sgs->group_weight =3D group->group_weight; =20 /* Check if dst CPU is idle and preferred to this group */ - if (!local_group && env->sd->flags & SD_ASYM_PACKING && - env->idle !=3D CPU_NOT_IDLE && sgs->sum_h_nr_running && - sched_group_asym(env, sgs, group)) { + if (!local_group && env->idle !=3D CPU_NOT_IDLE && sgs->sum_h_nr_running = && + sched_group_asym(env, sgs, group)) sgs->group_asym_packing =3D 1; - } =20 /* Check for loaded SMT group to be balanced to dst CPU */ if (!local_group && smt_balance(env, sgs, group)) @@ -11024,9 +11025,7 @@ static struct rq *find_busiest_queue(struct lb_env = *env, * If balancing between cores, let lower priority CPUs help * SMT cores with more than one busy sibling. */ - if ((env->sd->flags & SD_ASYM_PACKING) && - sched_asym(env->sd, i, env->dst_cpu) && - nr_running =3D=3D 1) + if (sched_asym(env->sd, i, env->dst_cpu) && nr_running =3D=3D 1) continue; =20 switch (env->migration_type) { @@ -11122,8 +11121,7 @@ asym_active_balance(struct lb_env *env) * the lower priority @env::dst_cpu help it. Do not follow * CPU priority. */ - return env->idle !=3D CPU_NOT_IDLE && (env->sd->flags & SD_ASYM_PACKING) = && - sched_use_asym_prio(env->sd, env->dst_cpu) && + return env->idle !=3D CPU_NOT_IDLE && sched_use_asym_prio(env->sd, env->d= st_cpu) && (sched_asym_prefer(env->dst_cpu, env->src_cpu) || !sched_use_asym_prio(env->sd, env->src_cpu)); }