From patchwork Fri Dec 30 15:26:11 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Aaron Conole X-Patchwork-Id: 18744 Return-Path: X-Original-To: patchwork@dpdk.org Delivered-To: patchwork@dpdk.org Received: from [92.243.14.124] (localhost [IPv6:::1]) by dpdk.org (Postfix) with ESMTP id 3DEEEF93B; Fri, 30 Dec 2016 16:27:45 +0100 (CET) Received: from mx1.redhat.com (mx1.redhat.com [209.132.183.28]) by dpdk.org (Postfix) with ESMTP id 6CC142C6D for ; Fri, 30 Dec 2016 16:26:29 +0100 (CET) Received: from int-mx14.intmail.prod.int.phx2.redhat.com (int-mx14.intmail.prod.int.phx2.redhat.com [10.5.11.27]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mx1.redhat.com (Postfix) with ESMTPS id E05BB4E326 for ; Fri, 30 Dec 2016 15:26:28 +0000 (UTC) Received: from dhcp-25-97.bos.redhat.com (unused [10.10.52.171] (may be forged)) by int-mx14.intmail.prod.int.phx2.redhat.com (8.14.4/8.14.4) with ESMTP id uBUFQLti031288 for ; Fri, 30 Dec 2016 10:26:28 -0500 From: Aaron Conole To: dev@dpdk.org Date: Fri, 30 Dec 2016 10:26:11 -0500 Message-Id: <1483111580-5397-15-git-send-email-aconole@redhat.com> In-Reply-To: <1483111580-5397-1-git-send-email-aconole@redhat.com> References: <1483111580-5397-1-git-send-email-aconole@redhat.com> X-Scanned-By: MIMEDefang 2.68 on 10.5.11.27 X-Greylist: Sender IP whitelisted, not delayed by milter-greylist-4.5.16 (mx1.redhat.com [10.5.110.38]); Fri, 30 Dec 2016 15:26:28 +0000 (UTC) Subject: [dpdk-dev] [RFC 14/23] eal: do not panic on tailq init X-BeenThere: dev@dpdk.org X-Mailman-Version: 2.1.15 Precedence: list List-Id: DPDK patches and discussions List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dev-bounces@dpdk.org Sender: "dev" There are some theoretical racy conditions in the system that _could_ cause early tailq init to fail; however, no need to panic the application. While it can't continue using DPDK, it could make better alerts to the user. Signed-off-by: Aaron Conole --- lib/librte_eal/common/eal_common_tailqs.c | 4 ++-- lib/librte_eal/linuxapp/eal/eal.c | 7 +++++-- 2 files changed, 7 insertions(+), 4 deletions(-) diff --git a/lib/librte_eal/common/eal_common_tailqs.c b/lib/librte_eal/common/eal_common_tailqs.c index bb08ec8..b856ec9 100644 --- a/lib/librte_eal/common/eal_common_tailqs.c +++ b/lib/librte_eal/common/eal_common_tailqs.c @@ -188,8 +188,8 @@ rte_eal_tailqs_init(void) if (t->head == NULL) { RTE_LOG(ERR, EAL, "Cannot initialize tailq: %s\n", t->name); - /* no need to TAILQ_REMOVE, we are going to panic in - * rte_eal_init() */ + /* no need to TAILQ_REMOVE, we are going to disallow re-attemtps + * for rte_eal_init(). */ goto fail; } } diff --git a/lib/librte_eal/linuxapp/eal/eal.c b/lib/librte_eal/linuxapp/eal/eal.c index 050543c..3616515 100644 --- a/lib/librte_eal/linuxapp/eal/eal.c +++ b/lib/librte_eal/linuxapp/eal/eal.c @@ -848,8 +848,11 @@ rte_eal_init(int argc, char **argv) return -1; } - if (rte_eal_tailqs_init() < 0) - rte_panic("Cannot init tail queues for objects\n"); + if (rte_eal_tailqs_init() < 0) { + RTE_LOG (ERR, EAL, "Cannot init tail queues for objects\n"); + errno = ENOTSUP; + return -1; + } if (rte_eal_alarm_init() < 0) rte_panic("Cannot init interrupt-handling thread\n");