From nobody Mon Feb 9 10:12:30 2026 Delivered-To: importer@patchew.org Received-SPF: none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) client-ip=192.237.175.120; envelope-from=xen-devel-bounces@lists.xenproject.org; helo=lists.xenproject.org; Authentication-Results: mx.zohomail.com; spf=none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org ARC-Seal: i=1; a=rsa-sha256; t=1564751331; cv=none; d=zoho.com; s=zohoarc; b=f3ynKizZtW6/Ezxylk7++Bx0OGdUySjdQF03ytLDkPkT9gtf28h1IrbesK68FhQGmtroBpQB9u+7WR9aXsJYVv3EopDAt6PJZBJCv3JSZKDCA9AuxmZE1Gh/Lycm29k31a/+0d/MprgiPyenMgtXvjEEyDMA3ZDf2m69qdNIPMM= ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=zoho.com; s=zohoarc; t=1564751331; h=Content-Type:Content-Transfer-Encoding:Cc:Date:From:In-Reply-To:List-Subscribe:List-Post:List-Id:List-Help:List-Unsubscribe:MIME-Version:Message-ID:References:Sender:Subject:To:ARC-Authentication-Results; bh=iVb8encPVXra1exJKBE2Hb29QbdKlhBgqiziwUj1R1Q=; b=Zx8WxRbDcohpm66bCgVPNnv3Azu2oMh0wh+jjLOfPbN8XGw3klkZqhGej0hNCpI6EmvRIISPHQuuwXfsSo9aXnAn4Me8vfzXfutFrHLGtN72ux+wYa6V6JyBjpssVAgYFVgyuSz3U0xGVx9T/ZPoyIG4at+BPxws5QLWbcqqssg= ARC-Authentication-Results: i=1; mx.zoho.com; spf=none (zoho.com: 192.237.175.120 is neither permitted nor denied by domain of lists.xenproject.org) smtp.mailfrom=xen-devel-bounces@lists.xenproject.org Return-Path: Received: from lists.xenproject.org (lists.xenproject.org [192.237.175.120]) by mx.zohomail.com with SMTPS id 1564751331158256.10434576056423; Fri, 2 Aug 2019 06:08:51 -0700 (PDT) Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1htXHV-0007F5-4O; Fri, 02 Aug 2019 13:07:37 +0000 Received: from us1-rack-dfw2.inumbo.com ([104.130.134.6]) by lists.xenproject.org with esmtp (Exim 4.89) (envelope-from ) id 1htXHT-0007Eg-Ao for xen-devel@lists.xenproject.org; Fri, 02 Aug 2019 13:07:35 +0000 Received: from mx1.suse.de (unknown [195.135.220.15]) by us1-rack-dfw2.inumbo.com (Halon) with ESMTPS id 7dc822c0-b526-11e9-8980-bc764e045a96; Fri, 02 Aug 2019 13:07:34 +0000 (UTC) Received: from relay2.suse.de (unknown [195.135.220.254]) by mx1.suse.de (Postfix) with ESMTP id 10C21AD45 for ; Fri, 2 Aug 2019 13:07:33 +0000 (UTC) X-Inumbo-ID: 7dc822c0-b526-11e9-8980-bc764e045a96 X-Virus-Scanned: by amavisd-new at test-mx.suse.de From: Juergen Gross To: xen-devel@lists.xenproject.org Date: Fri, 2 Aug 2019 15:07:28 +0200 Message-Id: <20190802130730.15942-2-jgross@suse.com> X-Mailer: git-send-email 2.16.4 In-Reply-To: <20190802130730.15942-1-jgross@suse.com> References: <20190802130730.15942-1-jgross@suse.com> Subject: [Xen-devel] [PATCH 1/3] xen/sched: populate cpupool0 only after all cpus are up X-BeenThere: xen-devel@lists.xenproject.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Cc: Juergen Gross , Dario Faggioli MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Errors-To: xen-devel-bounces@lists.xenproject.org Sender: "Xen-devel" With core or socket scheduling we need to know the number of siblings per scheduling unit before we can setup the scheduler properly. In order to prepare that do cpupool0 population only after all cpus are up. With that in place there is no need to create cpupool0 earlier, so do that just before assigning the cpus. Initialize free cpus with all online cpus at that time in order to be able to add the cpu notifier late, too. Signed-off-by: Juergen Gross --- V1: new patch --- xen/common/cpupool.c | 18 ++++++++++++++---- 1 file changed, 14 insertions(+), 4 deletions(-) diff --git a/xen/common/cpupool.c b/xen/common/cpupool.c index f90e496eda..caea5bd8b3 100644 --- a/xen/common/cpupool.c +++ b/xen/common/cpupool.c @@ -762,18 +762,28 @@ static struct notifier_block cpu_nfb =3D { .notifier_call =3D cpu_callback }; =20 -static int __init cpupool_presmp_init(void) +static int __init cpupool_init(void) { + unsigned int cpu; int err; - void *cpu =3D (void *)(long)smp_processor_id(); + cpupool0 =3D cpupool_create(0, 0, &err); BUG_ON(cpupool0 =3D=3D NULL); cpupool_put(cpupool0); - cpu_callback(&cpu_nfb, CPU_ONLINE, cpu); register_cpu_notifier(&cpu_nfb); + + spin_lock(&cpupool_lock); + + cpumask_copy(&cpupool_free_cpus, &cpu_online_map); + + for_each_cpu ( cpu, &cpupool_free_cpus ) + cpupool_assign_cpu_locked(cpupool0, cpu); + + spin_unlock(&cpupool_lock); + return 0; } -presmp_initcall(cpupool_presmp_init); +__initcall(cpupool_init); =20 /* * Local variables: --=20 2.16.4 _______________________________________________ Xen-devel mailing list Xen-devel@lists.xenproject.org https://lists.xenproject.org/mailman/listinfo/xen-devel