From patchwork Tue Oct 5 08:07:50 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Emanuele Giuseppe Esposito X-Patchwork-Id: 1536519 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@bilbo.ozlabs.org Authentication-Results: bilbo.ozlabs.org; dkim=fail reason="signature verification failed" (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=NNJYFn0D; dkim-atps=neutral Authentication-Results: ozlabs.org; spf=pass (sender SPF authorized) smtp.mailfrom=nongnu.org (client-ip=209.51.188.17; helo=lists.gnu.org; envelope-from=qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org; receiver=) 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 bilbo.ozlabs.org (Postfix) with ESMTPS id 4HNr6F0wb9z9sPB for ; Tue, 5 Oct 2021 19:17:09 +1100 (AEDT) Received: from localhost ([::1]:58418 helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1mXfdJ-0006AJ-Kq for incoming@patchwork.ozlabs.org; Tue, 05 Oct 2021 04:17:05 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]:46466) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXfUy-0004sJ-Cm for qemu-devel@nongnu.org; Tue, 05 Oct 2021 04:08:28 -0400 Received: from us-smtp-delivery-124.mimecast.com ([216.205.24.124]:45534) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1mXfUw-0004Cf-Rb for qemu-devel@nongnu.org; Tue, 05 Oct 2021 04:08:28 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1633421304; h=from:from:reply-to:subject:subject:date:date:message-id:message-id: to:to:cc:cc:mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=lYhmDF5jzz2hAR6SeeVCEi+YSN5ACtC6oWlPSKQXlI0=; b=NNJYFn0D3gGSnJCNRNMLhflM8AzLbV5Zc26HBPblhtdyOSeJwCmavVdlTNKRwhtfNCc6L+ 98p6ldOTFkmv4nMEXSFT0PdPWljCM1/1XypPeAheoNy0WF0wb2Pvgol5LzpB8eMWHEGOVk +RQxvfu3skFmvj8T/QjyAC4+HbWroVQ= Received: from mimecast-mx01.redhat.com (mimecast-mx01.redhat.com [209.132.183.4]) (Using TLS) by relay.mimecast.com with ESMTP id us-mta-245-u5XdWAxHO4uEGMV7E5nCYw-1; Tue, 05 Oct 2021 04:08:23 -0400 X-MC-Unique: u5XdWAxHO4uEGMV7E5nCYw-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.phx2.redhat.com [10.5.11.22]) (using TLSv1.2 with cipher AECDH-AES256-SHA (256/256 bits)) (No client certificate requested) by mimecast-mx01.redhat.com (Postfix) with ESMTPS id A9207802935; Tue, 5 Oct 2021 08:08:22 +0000 (UTC) Received: from virtlab701.virt.lab.eng.bos.redhat.com (virtlab701.virt.lab.eng.bos.redhat.com [10.19.152.228]) by smtp.corp.redhat.com (Postfix) with ESMTP id BF51B10013C1; Tue, 5 Oct 2021 08:08:21 +0000 (UTC) From: Emanuele Giuseppe Esposito To: qemu-block@nongnu.org Subject: [PATCH v1 1/2] migration: block-dirty-bitmap: add missing qemu_mutex_lock_iothread Date: Tue, 5 Oct 2021 04:07:50 -0400 Message-Id: <20211005080751.3797161-2-eesposit@redhat.com> In-Reply-To: <20211005080751.3797161-1-eesposit@redhat.com> References: <20211005080751.3797161-1-eesposit@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 2.84 on 10.5.11.22 Authentication-Results: relay.mimecast.com; auth=pass smtp.auth=CUSA124A263 smtp.mailfrom=eesposit@redhat.com X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com Received-SPF: pass client-ip=216.205.24.124; envelope-from=eesposit@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -28 X-Spam_score: -2.9 X-Spam_bar: -- X-Spam_report: (-2.9 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.066, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_LOW=-0.7, RCVD_IN_MSPIKE_H2=-0.001, SPF_HELO_NONE=0.001, SPF_PASS=-0.001 autolearn=ham autolearn_force=no X-Spam_action: no action 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: , Cc: Fam Zheng , Emanuele Giuseppe Esposito , Vladimir Sementsov-Ogievskiy , Juan Quintela , Eric Blake , "Dr. David Alan Gilbert" , qemu-devel@nongnu.org, Stefan Hajnoczi , Paolo Bonzini , John Snow Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: "Qemu-devel" init_dirty_bitmap_migration assumes the iothread lock (BQL) to be held, but instead it isn't. Instead of adding the lock to qemu_savevm_state_setup(), follow the same pattern as the other ->save_setup callbacks and lock+unlock inside dirty_bitmap_save_setup(). Signed-off-by: Emanuele Giuseppe Esposito Reviewed-by: Stefan Hajnoczi Reviewed-by: Juan Quintela --- migration/block-dirty-bitmap.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/migration/block-dirty-bitmap.c b/migration/block-dirty-bitmap.c index 35f5ef688d..9aba7d9c22 100644 --- a/migration/block-dirty-bitmap.c +++ b/migration/block-dirty-bitmap.c @@ -1215,7 +1215,10 @@ static int dirty_bitmap_save_setup(QEMUFile *f, void *opaque) { DBMSaveState *s = &((DBMState *)opaque)->save; SaveBitmapState *dbms = NULL; + + qemu_mutex_lock_iothread(); if (init_dirty_bitmap_migration(s) < 0) { + qemu_mutex_unlock_iothread(); return -1; } @@ -1223,7 +1226,7 @@ static int dirty_bitmap_save_setup(QEMUFile *f, void *opaque) send_bitmap_start(f, s, dbms); } qemu_put_bitmap_flags(f, DIRTY_BITMAP_MIG_FLAG_EOS); - + qemu_mutex_unlock_iothread(); return 0; }