From patchwork Thu Jan 28 05:49:44 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Bharata B Rao X-Patchwork-Id: 8146301 Return-Path: X-Original-To: patchwork-qemu-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 74F379F440 for ; Thu, 28 Jan 2016 05:51:28 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id DD7DA20256 for ; Thu, 28 Jan 2016 05:51:27 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [208.118.235.17]) (using TLSv1 with cipher AES256-SHA (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 390EC20122 for ; Thu, 28 Jan 2016 05:51:27 +0000 (UTC) Received: from localhost ([::1]:54076 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aOfUM-0002AA-M4 for patchwork-qemu-devel@patchwork.kernel.org; Thu, 28 Jan 2016 00:51:26 -0500 Received: from eggs.gnu.org ([2001:4830:134:3::10]:50579) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aOfU8-000272-TI for qemu-devel@nongnu.org; Thu, 28 Jan 2016 00:51:13 -0500 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1aOfU5-0005Bp-HX for qemu-devel@nongnu.org; Thu, 28 Jan 2016 00:51:12 -0500 Received: from e23smtp03.au.ibm.com ([202.81.31.145]:53632) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1aOfU4-00059z-TW for qemu-devel@nongnu.org; Thu, 28 Jan 2016 00:51:09 -0500 Received: from localhost by e23smtp03.au.ibm.com with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted for from ; Thu, 28 Jan 2016 15:51:05 +1000 Received: from d23dlp02.au.ibm.com (202.81.31.213) by e23smtp03.au.ibm.com (202.81.31.209) with IBM ESMTP SMTP Gateway: Authorized Use Only! Violators will be prosecuted; Thu, 28 Jan 2016 15:51:00 +1000 X-IBM-Helo: d23dlp02.au.ibm.com X-IBM-MailFrom: bharata@linux.vnet.ibm.com X-IBM-RcptTo: qemu-devel@nongnu.org;qemu-ppc@nongnu.org Received: from d23relay07.au.ibm.com (d23relay07.au.ibm.com [9.190.26.37]) by d23dlp02.au.ibm.com (Postfix) with ESMTP id 95B3B2BB005A; Thu, 28 Jan 2016 16:50:59 +1100 (EST) Received: from d23av02.au.ibm.com (d23av02.au.ibm.com [9.190.235.138]) by d23relay07.au.ibm.com (8.14.9/8.14.9/NCO v10.0) with ESMTP id u0S5orJo47185978; Thu, 28 Jan 2016 16:51:01 +1100 Received: from d23av02.au.ibm.com (localhost [127.0.0.1]) by d23av02.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVout) with ESMTP id u0S5oQLf001965; Thu, 28 Jan 2016 16:50:27 +1100 Received: from bharata.in.ibm.com ([9.124.35.121]) by d23av02.au.ibm.com (8.14.4/8.14.4/NCO v10.0 AVin) with ESMTP id u0S5oG81001110; Thu, 28 Jan 2016 16:50:23 +1100 From: Bharata B Rao To: qemu-devel@nongnu.org Date: Thu, 28 Jan 2016 11:19:44 +0530 Message-Id: <1453960195-15181-3-git-send-email-bharata@linux.vnet.ibm.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1453960195-15181-1-git-send-email-bharata@linux.vnet.ibm.com> References: <1453960195-15181-1-git-send-email-bharata@linux.vnet.ibm.com> X-TM-AS-MML: disable X-Content-Scanned: Fidelis XPS MAILER x-cbid: 16012805-0009-0000-0000-000002DC93F9 X-detected-operating-system: by eggs.gnu.org: GNU/Linux 3.x X-Received-From: 202.81.31.145 Cc: mjrosato@linux.vnet.ibm.com, ehabkost@redhat.com, aik@ozlabs.ru, Bharata B Rao , mdroth@linux.vnet.ibm.com, agraf@suse.de, pbonzini@redhat.com, qemu-ppc@nongnu.org, tyreld@linux.vnet.ibm.com, nfont@linux.vnet.ibm.com, imammedo@redhat.com, afaerber@suse.de, david@gibson.dropbear.id.au Subject: [Qemu-devel] [PATCH v7 02/13] exec: Remove cpu from cpus list during cpu_exec_exit() X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.14 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org Sender: qemu-devel-bounces+patchwork-qemu-devel=patchwork.kernel.org@nongnu.org X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_HI, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP CPUState *cpu gets added to the cpus list during cpu_exec_init(). It should be removed from cpu_exec_exit(). cpu_exec_init() is called from generic CPU::instance_finalize and some archs like PowerPC call it from CPU unrealizefn. So ensure that we dequeue the cpu only once. Now -1 value for cpu->cpu_index indicates that we have already dequeued the cpu for CONFIG_USER_ONLY case also. Signed-off-by: Bharata B Rao Reviewed-by: David Gibson --- exec.c | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/exec.c b/exec.c index 7115403..c8da9d4 100644 --- a/exec.c +++ b/exec.c @@ -596,6 +596,7 @@ void cpu_exec_exit(CPUState *cpu) return; } + QTAILQ_REMOVE(&cpus, cpu, node); bitmap_clear(cpu_index_map, cpu->cpu_index, 1); cpu->cpu_index = -1; } @@ -614,6 +615,15 @@ static int cpu_get_free_index(Error **errp) void cpu_exec_exit(CPUState *cpu) { + cpu_list_lock(); + if (cpu->cpu_index == -1) { + cpu_list_unlock(); + return; + } + + QTAILQ_REMOVE(&cpus, cpu, node); + cpu->cpu_index = -1; + cpu_list_unlock(); } #endif