From patchwork Thu Sep 28 13:19:56 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Markus Armbruster X-Patchwork-Id: 1840837 Return-Path: X-Original-To: incoming@patchwork.ozlabs.org Delivered-To: patchwork-incoming@legolas.ozlabs.org Authentication-Results: legolas.ozlabs.org; dkim=pass (1024-bit key; unprotected) header.d=redhat.com header.i=@redhat.com header.a=rsa-sha256 header.s=mimecast20190719 header.b=HNuqG4fD; dkim-atps=neutral Authentication-Results: legolas.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=patchwork.ozlabs.org) Received: from lists.gnu.org (lists.gnu.org [209.51.188.17]) (using TLSv1.2 with cipher ECDHE-ECDSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by legolas.ozlabs.org (Postfix) with ESMTPS id 4RxDmk0ylcz1yp0 for ; Thu, 28 Sep 2023 23:27:34 +1000 (AEST) Received: from localhost ([::1] helo=lists1p.gnu.org) by lists.gnu.org with esmtp (Exim 4.90_1) (envelope-from ) id 1qlqwn-0003gq-Fk; Thu, 28 Sep 2023 09:20:53 -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 1qlqwY-0003ZQ-TJ for qemu-devel@nongnu.org; Thu, 28 Sep 2023 09:20:38 -0400 Received: from us-smtp-delivery-124.mimecast.com ([170.10.133.124]) by eggs.gnu.org with esmtps (TLS1.2:ECDHE_RSA_AES_256_GCM_SHA384:256) (Exim 4.90_1) (envelope-from ) id 1qlqwO-0008Fc-IS for qemu-devel@nongnu.org; Thu, 28 Sep 2023 09:20:38 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=redhat.com; s=mimecast20190719; t=1695907227; 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=sG6Qx0S3rjdug66QRlVWtj2oS+HNlSyxhEJMsz5r45Q=; b=HNuqG4fDG3JZdx7REBJI9Kv8puR8FLojXq25z56zfNw2lMKw1HWvgFiRdAX4VRotQlzPw3 gaHz0HVweJ1NRiVgENoXGPs5B5WBWTaNhZTw2ycelM+NHHdBBIKQB8KZ6ml97CqGJbWmeT /gx9QyjVRnICPs003AecmKvHRLKGg7M= Received: from mimecast-mx02.redhat.com (mimecast-mx02.redhat.com [66.187.233.88]) by relay.mimecast.com with ESMTP with STARTTLS (version=TLSv1.2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id us-mta-530-e38rZNf6MnWXKR2mFBSgsg-1; Thu, 28 Sep 2023 09:20:23 -0400 X-MC-Unique: e38rZNf6MnWXKR2mFBSgsg-1 Received: from smtp.corp.redhat.com (int-mx07.intmail.prod.int.rdu2.redhat.com [10.11.54.7]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mimecast-mx02.redhat.com (Postfix) with ESMTPS id 60ACA185A79C; Thu, 28 Sep 2023 13:20:23 +0000 (UTC) Received: from blackfin.pond.sub.org (unknown [10.39.192.25]) by smtp.corp.redhat.com (Postfix) with ESMTPS id 3E30114171CB; Thu, 28 Sep 2023 13:20:23 +0000 (UTC) Received: by blackfin.pond.sub.org (Postfix, from userid 1000) id 240D021E6892; Thu, 28 Sep 2023 15:20:20 +0200 (CEST) From: Markus Armbruster To: qemu-devel@nongnu.org Cc: quintela@redhat.com, peterx@redhat.com, leobras@redhat.com, farosas@suse.de, lizhijian@fujitsu.com, eblake@redhat.com Subject: [PATCH v2 30/53] migration/rdma: Plug a memory leak and improve a message Date: Thu, 28 Sep 2023 15:19:56 +0200 Message-ID: <20230928132019.2544702-31-armbru@redhat.com> In-Reply-To: <20230928132019.2544702-1-armbru@redhat.com> References: <20230928132019.2544702-1-armbru@redhat.com> MIME-Version: 1.0 Content-type: text/plain X-Scanned-By: MIMEDefang 3.1 on 10.11.54.7 Received-SPF: pass client-ip=170.10.133.124; envelope-from=armbru@redhat.com; helo=us-smtp-delivery-124.mimecast.com X-Spam_score_int: -20 X-Spam_score: -2.1 X-Spam_bar: -- X-Spam_report: (-2.1 / 5.0 requ) BAYES_00=-1.9, DKIMWL_WL_HIGH=-0.001, DKIM_SIGNED=0.1, DKIM_VALID=-0.1, DKIM_VALID_AU=-0.1, DKIM_VALID_EF=-0.1, RCVD_IN_DNSWL_NONE=-0.0001, RCVD_IN_MSPIKE_H3=0.001, RCVD_IN_MSPIKE_WL=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: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org Sender: qemu-devel-bounces+incoming=patchwork.ozlabs.org@nongnu.org When migration capability @rdma-pin-all is true, but the server cannot honor it, qemu_rdma_connect() calls macro ERROR(), then returns success. ERROR() sets an error. Since qemu_rdma_connect() returns success, its caller rdma_start_outgoing_migration() duly assumes @errp is still clear. The Error object leaks. ERROR() additionally reports the situation to the user as an error: RDMA ERROR: Server cannot support pinning all memory. Will register memory dynamically. Is this an error or not? It actually isn't; we disable @rdma-pin-all and carry on. "Correcting" the user's configuration decisions that way feels problematic, but that's a topic for another day. Replace ERROR() by warn_report(). This plugs the memory leak, and emits a clearer message to the user. Signed-off-by: Markus Armbruster Reviewed-by: Li Zhijian Reviewed-by: Juan Quintela --- migration/rdma.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/migration/rdma.c b/migration/rdma.c index c57692e5a3..54f4a917be 100644 --- a/migration/rdma.c +++ b/migration/rdma.c @@ -2617,8 +2617,8 @@ static int qemu_rdma_connect(RDMAContext *rdma, bool return_path, * and disable them otherwise. */ if (rdma->pin_all && !(cap.flags & RDMA_CAPABILITY_PIN_ALL)) { - ERROR(errp, "Server cannot support pinning all memory. " - "Will register memory dynamically."); + warn_report("RDMA: Server cannot support pinning all memory. " + "Will register memory dynamically."); rdma->pin_all = false; }