From nobody Sun Feb 8 17:37:33 2026 Received: from us-smtp-delivery-124.mimecast.com (us-smtp-delivery-124.mimecast.com [170.10.129.124]) (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 04AA4156F3F for ; Sun, 18 Aug 2024 23:45:47 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=170.10.129.124 ARC-Seal: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724024749; cv=none; b=FC2CqLas9zNLIqUCcSNtuEZdPJX92nfwclLMX26N1YPdhSGiv5zQ0M0SEJnPncGu3VW5f1y+jc/asF2tztiuKkx/CuQ0LGHV5DwVeKt7QkOSGbYWoJu0vZdrAPwHf8d1QJwW8UhY+46c8Dvpx+siNuNft05h2/EOxjhrhM9Uy6I= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724024749; c=relaxed/simple; bh=K8N4sqRBO1QmisApM5o1j014BZ0JiNvo9k0GVZKy9Mk=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=dwAoTIpRGkUdqNCf48IvXsbeqLWXL1zkVsMPBkmik+n4jfrvFPKFmg4anY9gT7mu8wmuMxRHbJ47axatdvkn44p9QJF1x2LB7zYQMajDyNFrGYKT7krFz9Tnz9+cL5N5nb/HyFR3PaQp8SNNtusqyr7H5xvuF5QY/q+pOxOkhx4= ARC-Authentication-Results: i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com; spf=pass smtp.mailfrom=redhat.com; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b=JsW4/DrK; arc=none smtp.client-ip=170.10.129.124 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=redhat.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=redhat.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (1024-bit key) header.d=redhat.com header.i=@redhat.com header.b="JsW4/DrK" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724024746; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=/xTT9PXPTqZi64l2mdUMl7RWoFN2PRqSXvjmstfCL2M=; b=JsW4/DrKGty5EfK1au/BFl2Tc9DX6wovGow0CJD9KOeA7MX8Stl1ZagD7RXEPGDmTSl6Xp NbVgVmQyXgmvQxHGCkoW6Uq3cjE8hXWvw+x0GnxVHlX72pjs+WrWW+9SlppK5+hiWT5WnG OQAb90ueXyVM8G5yJaX8VAWdXQ673G4= Received: from mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (ec2-54-186-198-63.us-west-2.compute.amazonaws.com [54.186.198.63]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.3, cipher=TLS_AES_256_GCM_SHA384) id us-mta-669-YRjt1jxCOEqJEzPC9NJdnw-1; Sun, 18 Aug 2024 19:45:42 -0400 X-MC-Unique: YRjt1jxCOEqJEzPC9NJdnw-1 Received: from mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com [10.30.177.4]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by mx-prod-mc-04.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTPS id 9E69219560AD; Sun, 18 Aug 2024 23:45:40 +0000 (UTC) Received: from llong.com (unknown [10.2.16.4]) by mx-prod-int-01.mail-002.prod.us-west-2.aws.redhat.com (Postfix) with ESMTP id E398130001A1; Sun, 18 Aug 2024 23:45:37 +0000 (UTC) From: Waiman Long To: Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , Frederic Weisbecker Cc: linux-kernel@vger.kernel.org, Waiman Long Subject: [PATCH 2/3] sched/fair: Use HK_TYPE_SCHED housekeeping CPUs Date: Sun, 18 Aug 2024 19:45:19 -0400 Message-ID: <20240818234520.90186-3-longman@redhat.com> In-Reply-To: <20240818234520.90186-1-longman@redhat.com> References: <20240818234520.90186-1-longman@redhat.com> Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Transfer-Encoding: quoted-printable X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 Content-Type: text/plain; charset="utf-8" As the previous commit has enabled the setting of HK_TYPE_SCHED housekeeping CPUs in nohz_full setup, we can now use the more aptly named HK_TYPE_SCHED housekeeping CPUs instead of HK_TYPE_MISC. Signed-off-by: Waiman Long --- kernel/sched/fair.c | 7 ++----- 1 file changed, 2 insertions(+), 5 deletions(-) diff --git a/kernel/sched/fair.c b/kernel/sched/fair.c index 6be618110885..0350667f5ce8 100644 --- a/kernel/sched/fair.c +++ b/kernel/sched/fair.c @@ -12128,16 +12128,13 @@ static inline int on_null_domain(struct rq *rq) * - When one of the busy CPUs notices that there may be an idle rebalanci= ng * needed, they will kick the idle load balancer, which then does idle * load balancing for all the idle CPUs. - * - * - HK_TYPE_MISC CPUs are used for this task, because HK_TYPE_SCHED is no= t set - * anywhere yet. */ static inline int find_new_ilb(void) { const struct cpumask *hk_mask; int ilb_cpu; =20 - hk_mask =3D housekeeping_cpumask(HK_TYPE_MISC); + hk_mask =3D housekeeping_cpumask(HK_TYPE_SCHED); =20 for_each_cpu_and(ilb_cpu, nohz.idle_cpus_mask, hk_mask) { =20 @@ -12155,7 +12152,7 @@ static inline int find_new_ilb(void) * Kick a CPU to do the NOHZ balancing, if it is time for it, via a cross-= CPU * SMP function call (IPI). * - * We pick the first idle CPU in the HK_TYPE_MISC housekeeping set (if the= re is one). + * We pick the first idle CPU in the HK_TYPE_SCHED housekeeping set (if th= ere is one). */ static void kick_ilb(unsigned int flags) { --=20 2.43.5