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 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 smtp.lore.kernel.org (Postfix) with ESMTPS id 906B5EB64DA for ; Wed, 5 Jul 2023 20:56:16 +0000 (UTC) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qH9Xf-0001zw-8t; Wed, 05 Jul 2023 16:56:03 -0400 Received: from eggs.gnu.org ([2001:470:142:3::10]) by lists.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qH9Xd-0001ze-Jw for qemu-devel@nongnu.org; Wed, 05 Jul 2023 16:56:01 -0400 Received: from smtp-out1.suse.de ([195.135.220.28]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_128_GCM_SHA256:128) (Exim 4.90_1) (envelope-from ) id 1qH9Xc-0002Qt-2i for qemu-devel@nongnu.org; Wed, 05 Jul 2023 16:56:01 -0400 Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 97C6E21C43; Wed, 5 Jul 2023 20:55:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1688590558; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=kt/w+nTn5uZSUtsm1pyhk0QOst41mqcBSG+w0OzgBOk=; b=rWKB4aLZv/1AerGwnMJOm1dqBszlCpuyPzCrMP27Ucwl6egpNchaqfatHyBP4G9AjD22VY /egeNC/mzmq2fBxSHYL8DJhI5Bhnqg1PC1ubs3ccKxArCTsxIAYAj3aIpmClPMfB8+WDtb DX39m3jMpgaNld0IqOpYLAz83pmsleU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1688590558; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: in-reply-to:in-reply-to:references:references; bh=kt/w+nTn5uZSUtsm1pyhk0QOst41mqcBSG+w0OzgBOk=; b=52EE5QkNthTF04aSHIVVMsqpoEysVyKzYXOR1aS6sUrTAxoEQE+mzv12VOjHJQMCbAskQ9 ya4pucJLXrK0mADw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id F12A113460; Wed, 5 Jul 2023 20:55:57 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id Nf8qLd3YpWQVPAAAMHmgww (envelope-from ); Wed, 05 Jul 2023 20:55:57 +0000 From: Fabiano Rosas To: Peter Xu , qemu-devel@nongnu.org Cc: Leonardo Bras Soares Passos , Juan Quintela , Lukas Straub , Laszlo Ersek , peterx@redhat.com Subject: Re: [PATCH v2 3/7] migration: Introduce migrate_has_error() In-Reply-To: <20230705163502.331007-4-peterx@redhat.com> References: <20230705163502.331007-1-peterx@redhat.com> <20230705163502.331007-4-peterx@redhat.com> Date: Wed, 05 Jul 2023 17:55:54 -0300 Message-ID: <87edlm3wo5.fsf@suse.de> MIME-Version: 1.0 Content-Type: text/plain Received-SPF: pass client-ip=195.135.220.28; envelope-from=farosas@suse.de; helo=smtp-out1.suse.de X-Spam_score_int: -43 X-Spam_score: -4.4 X-Spam_bar: ---- X-Spam_report: (-4.4 / 5.0 requ) BAYES_00=-1.9, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_MED=-2.3, SPF_HELO_NONE=0.001, SPF_PASS=-0.001, T_SCC_BODY_TEXT_LINE=-0.01 autolearn=ham autolearn_force=no X-Spam_action: no action X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.29 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-bounces+qemu-devel=archiver.kernel.org@nongnu.org Peter Xu writes: > Introduce a helper to detect whether MigrationState.error is set for > whatever reason. It is intended to not taking the error_mutex here because > neither do we reference the pointer, nor do we modify the pointer. State > why it's safe to do so. > > This is preparation work for any thread (e.g. source return path thread) to > setup errors in an unified way to MigrationState, rather than relying on > its own way to set errors (mark_source_rp_bad()). > > Signed-off-by: Peter Xu Reviewed-by: Fabiano Rosas