From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-0.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS autolearn=no autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 70C2CECE58D for ; Mon, 7 Oct 2019 14:38:47 +0000 (UTC) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 4A9AA2084D for ; Mon, 7 Oct 2019 14:38:47 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4A9AA2084D Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=redhat.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Received: from localhost ([::1]:45578 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iHU9t-0005tv-PU for qemu-devel@archiver.kernel.org; Mon, 07 Oct 2019 10:38:45 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41199) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iHU81-0003yA-BZ for qemu-devel@nongnu.org; Mon, 07 Oct 2019 10:36:50 -0400 Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1iHU7z-0005QB-2P for qemu-devel@nongnu.org; Mon, 07 Oct 2019 10:36:47 -0400 Received: from mx1.redhat.com ([209.132.183.28]:49142) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iHU7y-0005Pi-Sz for qemu-devel@nongnu.org; Mon, 07 Oct 2019 10:36:47 -0400 Received: from smtp.corp.redhat.com (int-mx02.intmail.prod.int.phx2.redhat.com [10.5.11.12]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id 9FBDD7F749 for ; Mon, 7 Oct 2019 14:36:45 +0000 (UTC) Received: from dgilbert-t580.localhost (ovpn-117-145.ams2.redhat.com [10.36.117.145]) by smtp.corp.redhat.com (Postfix) with ESMTP id C5D5B60C05; Mon, 7 Oct 2019 14:36:44 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, pbonzini@redhat.com, berrange@redhat.com Subject: [PATCH v4 0/5] Automatic RCU read unlock Date: Mon, 7 Oct 2019 15:36:36 +0100 Message-Id: <20191007143642.301445-1-dgilbert@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.6.2 (mx1.redhat.com [10.5.110.71]); Mon, 07 Oct 2019 14:36:45 +0000 (UTC) Content-Transfer-Encoding: quoted-printable X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] [fuzzy] X-Received-From: 209.132.183.28 X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+qemu-devel=archiver.kernel.org@nongnu.org Sender: "Qemu-devel" From: "Dr. David Alan Gilbert" This patch uses glib's g_auto mechanism to automatically free rcu_read_lock's at the end of the block. Given that humans have a habit of forgetting an error path somewhere it's best to leave it to the compiler. v4 Mark the '_rcu_read_auto_' variable as 'unused' to work around a clang bug. Dr. David Alan Gilbert (5): rcu: Add automatically released rcu_read_lock variants migration: Fix missing rcu_read_unlock migration: Use automatic rcu_read unlock in ram.c migration: Use automatic rcu_read unlock in rdma.c rcu: Use automatic rc_read unlock in core memory/exec code docs/devel/rcu.txt | 16 +++ exec.c | 116 +++++++--------- include/exec/ram_addr.h | 138 +++++++++---------- include/qemu/rcu.h | 25 ++++ memory.c | 15 +-- migration/ram.c | 286 +++++++++++++++++++--------------------- migration/rdma.c | 57 ++------ 7 files changed, 304 insertions(+), 349 deletions(-) --=20 2.23.0