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=-6.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=ham 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 4D943ECE58C for ; Mon, 7 Oct 2019 14:38:46 +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 231E72084D for ; Mon, 7 Oct 2019 14:38:45 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 231E72084D 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]:45576 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iHU9s-0005rg-EP for qemu-devel@archiver.kernel.org; Mon, 07 Oct 2019 10:38:44 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:41221) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1iHU81-0003yJ-Sx 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 1iHU80-0005R5-R2 for qemu-devel@nongnu.org; Mon, 07 Oct 2019 10:36:49 -0400 Received: from mx1.redhat.com ([209.132.183.28]:38648) by eggs.gnu.org with esmtps (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.71) (envelope-from ) id 1iHU80-0005Qh-LO for qemu-devel@nongnu.org; Mon, 07 Oct 2019 10:36:48 -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 E1DC6309B142 for ; Mon, 7 Oct 2019 14:36:47 +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 15D1660C5E; Mon, 7 Oct 2019 14:36:46 +0000 (UTC) From: "Dr. David Alan Gilbert (git)" To: qemu-devel@nongnu.org, pbonzini@redhat.com, berrange@redhat.com Subject: [PATCH v4 2/5] migration: Fix missing rcu_read_unlock Date: Mon, 7 Oct 2019 15:36:38 +0100 Message-Id: <20191007143642.301445-3-dgilbert@redhat.com> In-Reply-To: <20191007143642.301445-1-dgilbert@redhat.com> References: <20191007143642.301445-1-dgilbert@redhat.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 X-Scanned-By: MIMEDefang 2.79 on 10.5.11.12 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.49]); Mon, 07 Oct 2019 14:36:47 +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" Use the automatic rcu_read unlocker to fix a missing unlock. Signed-off-by: Dr. David Alan Gilbert Reviewed-by: Daniel P. Berrang=C3=A9 --- migration/ram.c | 27 +++++++++++++-------------- 1 file changed, 13 insertions(+), 14 deletions(-) diff --git a/migration/ram.c b/migration/ram.c index 22423f08cd..484d66379a 100644 --- a/migration/ram.c +++ b/migration/ram.c @@ -3373,24 +3373,23 @@ static int ram_save_setup(QEMUFile *f, void *opaq= ue) } (*rsp)->f =3D f; =20 - rcu_read_lock(); - - qemu_put_be64(f, ram_bytes_total_common(true) | RAM_SAVE_FLAG_MEM_SI= ZE); + WITH_RCU_READ_LOCK_GUARD() { + qemu_put_be64(f, ram_bytes_total_common(true) | RAM_SAVE_FLAG_ME= M_SIZE); =20 - RAMBLOCK_FOREACH_MIGRATABLE(block) { - qemu_put_byte(f, strlen(block->idstr)); - qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->idstr)= ); - qemu_put_be64(f, block->used_length); - if (migrate_postcopy_ram() && block->page_size !=3D qemu_host_pa= ge_size) { - qemu_put_be64(f, block->page_size); - } - if (migrate_ignore_shared()) { - qemu_put_be64(f, block->mr->addr); + RAMBLOCK_FOREACH_MIGRATABLE(block) { + qemu_put_byte(f, strlen(block->idstr)); + qemu_put_buffer(f, (uint8_t *)block->idstr, strlen(block->id= str)); + qemu_put_be64(f, block->used_length); + if (migrate_postcopy_ram() && block->page_size !=3D + qemu_host_page_size) { + qemu_put_be64(f, block->page_size); + } + if (migrate_ignore_shared()) { + qemu_put_be64(f, block->mr->addr); + } } } =20 - rcu_read_unlock(); - ram_control_before_iterate(f, RAM_CONTROL_SETUP); ram_control_after_iterate(f, RAM_CONTROL_SETUP); =20 --=20 2.23.0