From nobody Sun Feb 8 15:58:21 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 513AC155A24 for ; Sun, 18 Aug 2024 23:45:44 +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=1724024746; cv=none; b=ixykUHdHghanPOo7W1ab1D0cwiXwHj/+oxIPJym/lCeQVGY+c9u27WKW8/AvCOJV2SB/RivM2BIMY2wa4OH8Dpo7YAdBcK5uCf8mCs5qJ4aW/RAMfd+tZt7/2BugZ67A0WSZWwfFgUgCThFDXbnrAaBeyr/oSqYQ1XOY0IKUae8= ARC-Message-Signature: i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1724024746; c=relaxed/simple; bh=5GLJcx23yiK6O5h0SYqrBFpzEywtPryZurqS5veZTjs=; h=From:To:Cc:Subject:Date:Message-ID:In-Reply-To:References: MIME-Version; b=K6u1PK9MSDIWv3NzDIKzugcuD1aT8PdXXi8uDzsNW4A/7aiyR2F5nLOsdMilfXEmLzEXeeYSQAfExU7hOqqhOj0CYrkV7X3uQEM/nbA5OoxcMXcWd3ABk89tVkJDM+q6oCCfpLGUvvKYgBkuQXcdwD6jlnVfRwbNiwUffp63UQ8= 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=Pa/u5Dmz; 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="Pa/u5Dmz" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1724024743; 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=UsNWp9LzBud4wrCMbUUSaGfMdSBqayoquJewiX+GBJw=; b=Pa/u5Dmz6BDXC6ydhXescE0tCAMijuOAzjHgwmKY99NdaAUIPOv1YeUjJ2/HKUfMX2Uth8 ScK2M9X7sQKazzdMQbxIb6F5jbbBaDvlOiqCzwUsKM0I2jrzEntxBh+P3E+AGEiKCQ2IfF 8lpUzw+pQl5qDiZR3an8SQaBErGTo8U= 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-1-7xNAUBQZNE6Vd42dqqL3_Q-1; Sun, 18 Aug 2024 19:45:39 -0400 X-MC-Unique: 7xNAUBQZNE6Vd42dqqL3_Q-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 DD72219560B0; Sun, 18 Aug 2024 23:45:37 +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 C449E30001A4; Sun, 18 Aug 2024 23:45:34 +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 1/3] sched/isolation: Add HK_FLAG_SCHED to nohz_full Date: Sun, 18 Aug 2024 19:45:18 -0400 Message-ID: <20240818234520.90186-2-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" The HK_FLAG_SCHED/HK_TYPE_SCHED flag is defined and is also used in kernel/sched/fair.c since commit de201559df87 ("sched/isolation: Introduce housekeeping flags"). However, the corresponding cpumask isn't currently updated anywhere. So the mask is always cpu_possible_mask. Add it in nohz_full setup so that nohz_full CPUs will now be removed from HK_TYPE_SCHED cpumask. Signed-off-by: Waiman Long --- kernel/sched/isolation.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/kernel/sched/isolation.c b/kernel/sched/isolation.c index 5891e715f00d..a514994af319 100644 --- a/kernel/sched/isolation.c +++ b/kernel/sched/isolation.c @@ -196,7 +196,7 @@ static int __init housekeeping_nohz_full_setup(char *st= r) unsigned long flags; =20 flags =3D HK_FLAG_TICK | HK_FLAG_WQ | HK_FLAG_TIMER | HK_FLAG_RCU | - HK_FLAG_MISC | HK_FLAG_KTHREAD; + HK_FLAG_MISC | HK_FLAG_KTHREAD | HK_FLAG_SCHED; =20 return housekeeping_setup(str, flags); } --=20 2.43.5