From patchwork Tue Apr 20 15:44:19 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Michael Kelley (LINUX)" X-Patchwork-Id: 12214523 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=-16.5 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,MSGID_FROM_MTA_HEADER,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT 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 4FED4C43460 for ; Tue, 20 Apr 2021 15:44:58 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 E15CB613B0 for ; Tue, 20 Apr 2021 15:44:57 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org E15CB613B0 Authentication-Results: mail.kernel.org; dmarc=fail (p=reject dis=none) header.from=microsoft.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0E3D76E843; Tue, 20 Apr 2021 15:44:57 +0000 (UTC) Received: from NAM02-BL2-obe.outbound.protection.outlook.com (mail-eopbgr750099.outbound.protection.outlook.com [40.107.75.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id D0C396E843 for ; Tue, 20 Apr 2021 15:44:55 +0000 (UTC) ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=mUuIBtNxM04XMqDKOd9t26mQjj5qPiTcSOTsO6FMiOvXfaYNoakafzAuj1ln5rQcJQJPEbBo+WUcuN5Lzb3ZfE+64IYT32YAUJx+FPsOJaXnkPYAbAzgERE8bvklEymrIOxaFalu01+/oPXRqs6n7+As8PwzwKswkv/ZM4hSZ8peQoYpbvpDxSMaajqgNEbiwVoL3348GQpjE+M9E95o+s+T5CZXEd1sHjLL0k4Igca3rcot8+6H22lT1hVauIkx/s2FLlkjYSEssnxWlbZS9MIXamimg3A+vfkdpLDVM74z5qDGDo7Kp6XQvwGBDPEIdpGXeWoty0gan5j5W8mfcg== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector9901; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=T5+edhKgshdWyjXx4xTZ/G6ZEEtMlZx9+PxCso7lOUo=; b=AysIUqrIPVDMWwm/EJkcJEQW3sVjEjFAZ1oHPcWCfoo6XFN9Rp4QbRtC8bVNpQOREby/xyIyaGYpt+/3IohQwLQJw9F0Vbgjj9QJbH2jjAZA9D9injGdil87O1OvkMZ5873F1f2jmjuRjd0aQzT8OYUTpWT6h4qUmdLfMNwHtKDWATCp52Kr0Bg0+6IAPzZlIOKVs09EZe2B4O8o/+WGUVm5mQGb3rlVRbvP/erdkrgDD6FTSXgwn7REXSUjc/SWdFlVOxBDO+Dq627uPSaTXH/5vHdQyoVNhIxWWvLFaQI9zkapCVbLeH6KcdEpmAneDqifitwGKJOIVfyMhVt2Ag== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=microsoft.com; dmarc=pass action=none header.from=microsoft.com; dkim=pass header.d=microsoft.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=selector2; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=T5+edhKgshdWyjXx4xTZ/G6ZEEtMlZx9+PxCso7lOUo=; b=HGdZYednUX6e8JfAteE1W7Vhk9Yi7NhXll8N2umIGHRoynJiC3S0x2YjdpJe3a4Mp/R+lKgrqknTToQRVO8fP6OpQ2rpSoLdcTmA4JSWunWoU/KodrQF0xqRhLqOXdWkr7w5frC1KUH5fpPqxhQG02hD/dIFr9BqAfxh1ChtIfA= Authentication-Results: microsoft.com; dkim=none (message not signed) header.d=none;microsoft.com; dmarc=none action=none header.from=microsoft.com; Received: from DM6PR21MB1514.namprd21.prod.outlook.com (2603:10b6:5:22d::11) by DM5PR2101MB1062.namprd21.prod.outlook.com (2603:10b6:4:9e::19) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4087.11; Tue, 20 Apr 2021 15:44:53 +0000 Received: from DM6PR21MB1514.namprd21.prod.outlook.com ([fe80::7903:384:ac51:1769]) by DM6PR21MB1514.namprd21.prod.outlook.com ([fe80::7903:384:ac51:1769%7]) with mapi id 15.20.4087.015; Tue, 20 Apr 2021 15:44:53 +0000 From: Michael Kelley To: kys@microsoft.com, haiyangz@microsoft.com, sthemmin@microsoft.com, wei.liu@kernel.org, linux-kernel@vger.kernel.org, linux-hyperv@vger.kernel.org, linux-fbdev@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: [PATCH 1/1] video: hyperv_fb: Add ratelimit on error message Date: Tue, 20 Apr 2021 08:44:19 -0700 Message-Id: <1618933459-10585-1-git-send-email-mikelley@microsoft.com> X-Mailer: git-send-email 1.8.3.1 X-Originating-IP: [131.107.160.144] X-ClientProxiedBy: MWHPR04CA0069.namprd04.prod.outlook.com (2603:10b6:300:6c::31) To DM6PR21MB1514.namprd21.prod.outlook.com (2603:10b6:5:22d::11) MIME-Version: 1.0 X-MS-Exchange-MessageSentRepresentingType: 1 Received: from mhkdev.corp.microsoft.com (131.107.160.144) by MWHPR04CA0069.namprd04.prod.outlook.com (2603:10b6:300:6c::31) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.4042.16 via Frontend Transport; Tue, 20 Apr 2021 15:44:52 +0000 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: 19d6a8cf-18aa-4ca6-a337-08d904133d77 X-MS-TrafficTypeDiagnostic: DM5PR2101MB1062: X-MS-Exchange-Transport-Forked: True X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:6108; X-MS-Exchange-SenderADCheck: 1 X-Microsoft-Antispam: BCL:0; X-Microsoft-Antispam-Message-Info: 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 X-Forefront-Antispam-Report: CIP:255.255.255.255; CTRY:; LANG:en; SCL:1; SRV:; IPV:NLI; SFV:NSPM; H:DM6PR21MB1514.namprd21.prod.outlook.com; PTR:; CAT:NONE; SFS:(4636009)(366004)(52116002)(4326008)(2616005)(83380400001)(5660300002)(498600001)(6486002)(8676002)(36756003)(26005)(7696005)(15650500001)(107886003)(6666004)(10290500003)(186003)(16526019)(86362001)(38100700002)(82960400001)(8936002)(38350700002)(956004)(66556008)(82950400001)(4744005)(66476007)(2906002)(66946007); DIR:OUT; SFP:1102; X-MS-Exchange-AntiSpam-MessageData: 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 X-OriginatorOrg: microsoft.com X-MS-Exchange-CrossTenant-Network-Message-Id: 19d6a8cf-18aa-4ca6-a337-08d904133d77 X-MS-Exchange-CrossTenant-AuthSource: DM6PR21MB1514.namprd21.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 20 Apr 2021 15:44:53.3210 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 72f988bf-86f1-41af-91ab-2d7cd011db47 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 4z7M/bYs+dQSWpkLxq4C6XMpt5Bpwy1Y+s8JCIqlEqQmXRYZ70T7CIC/6XeJii3WzHCfXsH2g0mkwTg+EorfSA== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM5PR2101MB1062 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mikelley@microsoft.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Due to a full ring buffer, the driver may be unable to send updates to the Hyper-V host. But outputing the error message can make the problem worse because console output is also typically written to the frame buffer. As a result, in some circumstances the error message is output continuously. Break the cycle by rate limiting the error message. Also output the error code for additional diagnosability. Signed-off-by: Michael Kelley --- drivers/video/fbdev/hyperv_fb.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/drivers/video/fbdev/hyperv_fb.c b/drivers/video/fbdev/hyperv_fb.c index 4dc9077..a7e6eea 100644 --- a/drivers/video/fbdev/hyperv_fb.c +++ b/drivers/video/fbdev/hyperv_fb.c @@ -308,7 +308,7 @@ static inline int synthvid_send(struct hv_device *hdev, VM_PKT_DATA_INBAND, 0); if (ret) - pr_err("Unable to send packet via vmbus\n"); + pr_err_ratelimited("Unable to send packet via vmbus; error %d\n", ret); return ret; }