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.xenproject.org (lists.xenproject.org [192.237.175.120]) (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 4303CC433EF for ; Wed, 5 Jan 2022 14:34:32 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.253622.434825 (Exim 4.92) (envelope-from ) id 1n57ML-0000Ee-6k; Wed, 05 Jan 2022 14:33:49 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 253622.434825; Wed, 05 Jan 2022 14:33:49 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1n57ML-0000EW-3d; Wed, 05 Jan 2022 14:33:49 +0000 Received: by outflank-mailman (input) for mailman id 253622; Wed, 05 Jan 2022 14:33:48 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1n57MK-0000EQ-9v for xen-devel@lists.xenproject.org; Wed, 05 Jan 2022 14:33:48 +0000 Received: from esa5.hc3370-68.iphmx.com (esa5.hc3370-68.iphmx.com [216.71.155.168]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 7b679e7c-6e34-11ec-9ce5-af14b9085ebd; Wed, 05 Jan 2022 15:33:45 +0100 (CET) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 7b679e7c-6e34-11ec-9ce5-af14b9085ebd DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=citrix.com; s=securemail; t=1641393225; h=date:from:to:cc:subject:message-id:references: in-reply-to:mime-version; bh=tv2yhoGBehO1p+ehoOoDOBvQTOgenysxP0E5t45FReA=; b=enhtkp//CrmAIhaIYNzDz7raZi0ZOUWsi+BtcY/9wqfGHntWNqOsxWiI SJPDNxiifeGgtDqC8icQl4scwk01wXiupgZEbyDdoFUIK1sgq9hfPHmSR +0b/d0Tcuwzq1QpsBxf2bul6Tro9TSTtCqRGq5pnHn+gf6TT9Gz8UZnIh A=; Authentication-Results: esa5.hc3370-68.iphmx.com; dkim=pass (signature verified) header.i=@citrix.onmicrosoft.com IronPort-SDR: EFuKXv5+E1FLRzcxoMzd9ASmB9vHb2xd8+wRvFd+pdKCx6WWK5kFk+YvcZ4jnnHxIo7nhWZz4L 9XyLweeHZeV3S4R4Cu9KGzo5V49aKPHewZmWtdw+k3NjNP2rr6qS5TYoHvY54aQ5sIxvFlNBE7 7nHZH3/gv5xCS4SH7U66TO2ubKZdZnOOyzVDw3zWEQ3hVGsVSxoTpuH1hIMskoh9eZkpvuw3E4 p0X5T9zEuP1bytgVq2XlxgP6mtqVLodn8Bo1EWELd0e8LehnFBXR9yANWE7dRFE5HfwZ3g8NOk RaFudPtga/biwRsmvZgio0a3 X-SBRS: 5.1 X-MesageID: 60849771 X-Ironport-Server: esa5.hc3370-68.iphmx.com X-Remote-IP: 162.221.156.83 X-Policy: $RELAYED IronPort-Data: A9a23:pskElqgncUPcrdKeL/QyZiiwX161vhcKZh0ujC45NGQN5FlHY01je htvDD/SMquIYzbxedtwb4Xlo04CuZ+AyoBnTgA/pS02RS8b9cadCdqndUqhZCn6wu8v7a5EA 2fyTvGacajYm1eF/k/F3oAMKRCQ7InQLlbGILes1htZGEk0GE/NtTo5w7Rj2tcw3IDja++wk YiaT/P3aQfNNwFcagr424rbwP+4lK2v0N+wlgVWicFj5DcypVFMZH4sDfjZw0/DaptVBoaHq 9Prl9lVyI97EyAFUbtJmp6jGqEDryW70QKm0hK6UID66vROS7BbPg/W+5PwZG8O4whlkeydx /1D8piXaURqJJT8kchaWSFgIzh/OoZ/reqvzXiX6aR/zmXDenrohf5vEFs3LcsT/eMf7WNmr KJCbmpXN1ba2rzwkOnTpupE36zPKOHxO4wSoDd4xCzxBvc6W5HTBa7N4Le02R9u3pASTKmBP qL1bxJOKxjsUjNCFW4VM7t5sP703WHxXD5x/Qf9Sa0fvDGIkV0ZPKLWGMrYfJmGSNtYmm6cp 3na5CLpDxcCLtudxDGZtHW2iYfnkyLhVYcfCLC/7NZ3m1CJ3SoIDwAMXla1puO2hwi4Vs43F qAP0nNw9+5orhXtF4SjGU3jyJKZgvICc9QXF8oaq0KX85rdz0GTPlA0Vz9GQ+Vz4afaWgcW/ lOOmtroAxlmv7uUVW+R+9+okN+iBcQGBTRcPHFZFGPp9/Gm+dhu1UyXEr6PBYbo1rXI9SfML ydmRcTUr5EaloY12qqy5jgraBr898GSHmbZCug6N19JDz+Vhqb5N+RECnCBtJ6sybp1qHHa4 hDofODEtogz4WmlznDlfQn0NOjBCwy5GDPdm0VzOJIq6i6g/XWuFagJvm0nfx0wYp9aI2O3C KM2he+3zMQNVJdNRfUsC79d9uxwlfSwfTgbfq28giVyjmhZK1bcoXAGib+41GHxikk8+ZzTy r/AGftA+U0yUPw9pBLvHr91+eZymkgWmDOCLbimnk/P+efPOxaopUItbQLmghYRt/jf/m04M r93aqO39vmoeLGkP3SMr9dMdQtiwLpSLcmelvG7v9Wre2JOMGogF+XQ0fUmfYlklL5SjeDG4 je2XUow9bY1rSGvxdyiZi8xZbXxc4x4qH5nbyUgMUzxgyooYJq17bdZfJwyJOF1+OtmxP9yb v8EZ8TfXagfFmWZo2wQPcvnsYhvVBW3ngbSbSCrVycyIsx7TAvT9966Iga2rHsSDjC6vNcVq qG70l+JWoIKQglvVZ6EaP+mw16rk2IaneZ+AxnBLtVJIR2++4l2MS3hyPQwJphUexnEwzKb0 SeQAAsZ+raR89NkroGRiPnd/YmzEuZ4Ek5LJEXh7O67ZXvA426u4Y5cS+LULzrTY3z5pfe5b uJPwvCibPBexARWs5BxGqpAxL4l44e9vKdTywlpESmZb1mvDb88cHCK0dMW6/9Iz75d/wC3R liO6p9RPrDQYJHpF1sYJQwEaOWf1K5LxmmOvKpteEiqtjVq+LenUFlJO0jegSNQG7J5LYc5z Lpzo8UR8QG+1kInP9vuYvq4LIhQwqjsi5kai6w= IronPort-HdrOrdr: A9a23:n+cJ+aGIS4aCFzYapLqFCpHXdLJyesId70hD6qkvc3Nom52j+/ xGws536faVslcssHFJo6HmBEClewKnyXcV2/hrAV7GZmfbUQSTXeNfBOfZsljd8mjFh5NgPM RbAtZD4b/LfCFHZK/BiWHSebZQo+VvsprY/ds2p00dMj2CAJsQiTuRZDzrdnGfE2J9dOYE/d enl4J6jgvlXU5SQtWwB3EDUeSGj9rXlKj+aRpDIxI88gGBgR6h9ba/SnGjr10jegIK5Y1n3X nOkgT/6Knmm/anyiXE32uWy5hNgtPuxvZKGcTJoMkILTfHjBquee1aKva/lQFwhNvqxEchkd HKrRtlF8Nv60nJdmXwmhfp0xmI6kdY11bSjXujxVfzq83wQzw3T+Bbg5hCTxff4008+Plhza NixQuixtVqJCKFuB64y8nDVhlsmEbxi2Eli/Qvg3tWVpZbQKNNrLYY4FheHP47bW7HAbgcYa hT5fznlbZrmQvwVQGbgoAv+q3gYp0LJGbJfqBY0fblkQS/nxhCvj8lLYIk7zI9HakGOul5Dt L/Q9FVfYF1P74rhJ1GdZQ8qOuMexrwqEH3QSuvyWqOLtB0B5uKke+y3IkI X-IronPort-AV: E=Sophos;i="5.88,264,1635220800"; d="scan'208";a="60849771" ARC-Seal: i=1; a=rsa-sha256; s=arcselector9901; d=microsoft.com; cv=none; b=NY04HXZCviRRG3PcHUA32fQItJyOBon3n3GXpywkjGFwqM8Ns0GB5DYkxNH9wqYs4zBdwfDN6mHtzSvi/v/67DL5GgC/cTeWw6nRxQER21jSVYUOoRRQONqUR6l2iIHhVxOkThvsbrjKuqInnfnOB7/7IP5ju8SSGkg/XrteBCJHHdagnLcfkIse8Jr60+1YWg0Ea9DC5nCcOYeJUOzy/y/mLUfH1+Tj0lCgi4rOwhwhzT3o+Rsia+JQ08GvAoHFdb83GSFjnUD6t/bgTm/Tc9QVjt/YW2epRpCPTqjgVitvaAIvx4Cviu5pjQaL2Zph1OCEj+MQMZhoBdIJGwRyjQ== 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-AntiSpam-MessageData-ChunkCount:X-MS-Exchange-AntiSpam-MessageData-0:X-MS-Exchange-AntiSpam-MessageData-1; bh=zMjIHHZJFeTFDTmLnE2ZBy3TmKC0C/cAuXPQ26YKXIs=; b=YbaLidohSE32TrPpCbdUhkYFVL9kMnuiytHZ8Tmj031v46WKpadSFARX1Gy85RSrM1IM6KewcEuzaWhqG616XINPlvg/6IHALTBNWYTB59D41LXa3nRYtFrJ+0legpUDW+wL05d+WuF+inUdrkPVTNpxY6nBnXA8yoE7DuZB/9/XH3Vh1D0NzkeRIVsVBxHJx7gt6l2Hh7ZOsDiTZr2L2zkFORLdodEKX44PDj0KY90YP0Bsa1t6EdoPQ156RgMrH+20SI2p7rm3FQPI5V6oayOJAnr9RL5IC3fiXypuCRL4XV44iUvK4lZQTT5vdUgDwuqbdiAswOdZmRR/AvcwbQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=citrix.com; dmarc=pass action=none header.from=citrix.com; dkim=pass header.d=citrix.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=citrix.onmicrosoft.com; s=selector2-citrix-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=zMjIHHZJFeTFDTmLnE2ZBy3TmKC0C/cAuXPQ26YKXIs=; b=u8ApqP7JWQPMHC7WJDK3PE1icCUv9nmanVyrSe/XoZhRqGcVBRbXOmQtVZnu49cwC2MX8CbBy8eLYrkA4Ass7P+t0dZaPmMnO/TCykvR20tnfKNQwWAPIIUdfIF01nTdm/cneCaRHkmuOGByHeuwfrzlcCcHyP6e/N0VoJK9o9Q= Date: Wed, 5 Jan 2022 15:33:33 +0100 From: Roger Pau =?utf-8?B?TW9ubsOp?= To: G.R. CC: Subject: Re: Possible bug? DOM-U network stopped working after fatal error reported in DOM0 Message-ID: References: Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: X-ClientProxiedBy: FR0P281CA0060.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:49::17) To DS7PR03MB5608.namprd03.prod.outlook.com (2603:10b6:5:2c9::18) MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-Office365-Filtering-Correlation-Id: d1841cb8-6195-4a8c-1fb6-08d9d0585c92 X-MS-TrafficTypeDiagnostic: DM6PR03MB4060:EE_ X-Microsoft-Antispam-PRVS: X-MS-Oob-TLC-OOBClassifiers: OLM:3044; X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 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:DS7PR03MB5608.namprd03.prod.outlook.com;PTR:;CAT:NONE;SFS:(7916004)(4636009)(366004)(6916009)(26005)(83380400001)(33716001)(4326008)(508600001)(66476007)(85182001)(6666004)(86362001)(38100700002)(6506007)(5660300002)(186003)(8676002)(8936002)(316002)(6512007)(82960400001)(9686003)(66946007)(6486002)(66556008)(2906002);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?YkhXTkxleUs5emwrSDgrZi9SejU2T3dLcE9sTWxzV0lCTm43TWNpQ0hVeW9W?= =?utf-8?B?MFJGaW5ucFRoQkdhaXU0RmQ0RjRPZnR1MXVuMmFDQmZqUnI5dno4NWFhQktp?= =?utf-8?B?TW92TzM1c2kzRC92emJxck9YTHlCQjlrbkdZalZHaU42YVAyWUVEanZrVTR2?= =?utf-8?B?YzdNNHpod2hkaUNySUorcHZ4a0h1UjN5UnpRR01yYTM5TlBlNXZGUzl2SXR5?= =?utf-8?B?M3RGb2Q4MktyVFFNODVPSlE5SGdMTXFESSs0dXcvV2IyTmt6MGdSdDNtTXdr?= =?utf-8?B?K2IyWXB0aWpDb2JFRUhCWkV2VS9ReXYrc1JDOWV4K3NtdmdQVzlsK1lJMEJa?= =?utf-8?B?UWNTVjVXK0RVWjY2eWhPZE1NWERqTlJJSXh6YW1wdktXNHRuUWJSZWNnNXYv?= =?utf-8?B?aVhrOFNCeVp3UU5hZ0ZwVnhVN1N1Mm1PU0w3aXFubUpLSmtCN3JzZHBHaExD?= =?utf-8?B?a1JvbGtSdmwzQk9rSzN4Y0dLQloyS09OejIvWGR3MlRXeDBTQUxrRDBscVhZ?= =?utf-8?B?ckZiSG1EZkdyNFZycmdncVZkS3JpdWJhOC96U3NQYkpINStXYnJiNWZTOHlI?= =?utf-8?B?VXlXSFdqempzeVN1OFRtZEpPL2MwbUs5VlpOZ3BLY05KcWt2ZDduOFkvVDRT?= =?utf-8?B?M2hlU0RMd3Iwb1NUa3BrR09xdTdPaitiV3FpOFQ2dWNnaDZjZzV3Z2lIVlZR?= =?utf-8?B?N0haTGoxdTNvNU90c1hBMW43ODdoWDkrYkhSbHdLaU12WHdOTGM4V24rRVQ5?= =?utf-8?B?NXZBZk9sNkhpTlJhWHFBUGdMc0RxWHQ1OFVtY0x0R0hVREZCcWJGMWVXQ2JJ?= =?utf-8?B?cEgxOVNnNnpWVE5OcW43a3k3L25XWGlRdUtmZ3VCeHVab0NxN0dhSG9vOGxW?= =?utf-8?B?WnhxSU1uYjIzc0ZlZ0lITzd2QzcyY25kNWd0Q29jeVVDaGJRM21tVmhTZmtC?= =?utf-8?B?Uy80NnNvZjhaQmkwWHMvSUU4VWV3QTJMeVEwMXRiRFJTa09UdndZV0pBNkQ0?= =?utf-8?B?NVp1dC9nblZzNlRRRG1hMTZXRUNqV2JOZUNiTnRFcGdweStCOTRFdjc3UTdm?= =?utf-8?B?bVJvcXpHdTBlWk5pTEdXUDNHdHRwZlpnK0VHZnNQd3RNcUFpZjd2OXpidmRz?= =?utf-8?B?RmxLK01COUpKVEllMHVBN0Fwc3pGOUt0T0xIZUtEUVFyTHdwV21WZHd3VmpU?= =?utf-8?B?elZTTmdFOEtjRzNRNlUvdjZVdFZGQVlLdWVmendjcDVFSFRHU0lKekVHM1dx?= =?utf-8?B?TDd4RCtySVAzbFJxSGZTSHR5Vk5UVjB3UXFVd0ZVZVVtRTBTcG9PbjByWFVU?= =?utf-8?B?WlI4QVNJMDV5WENpbU5rWHJKZDZmdnpOL2pKVFFUR3RvdGM3MXdPUWUxbXFU?= =?utf-8?B?QU1yVjNvTWhqSUNDNVN4TFVXZENtQno2VTR4d1dqQnI2NFM0eXR6NHhFVzdi?= =?utf-8?B?QjMwUHlFaWZYSDVpOXVYclVpL1J2bjZobzcwanpOSFB2Vm9WQlArM3FmaHp3?= =?utf-8?B?STVIY3BWQ2JnMDZPU2d6VlpPaGdaTkhrQzBzT3pFTFhjeVlxM25TdCtqM2RL?= =?utf-8?B?T0hOWUc2MTZSRk1sR1JHa1lPbzcyTTFBRDR3KzZtZ1J5ZENjQkY0Z01ZOHpw?= =?utf-8?B?em55OWg3dFloUEVkajVFMkIrZlJyeUlKK2Yrb3pZUmZNcENIdkVKajdZTXNh?= =?utf-8?B?UmxGRVZZaXM5U1Rsakk2VHYxY3dYV0paRVFkQ1hZY2YrZ2VIQndSSTZjeTQ5?= =?utf-8?B?QW8xU1BLUzBIVVdZR2ZlWGFYaVY0ZXYyY3I5dW9pZ3VhQVR2SFNUNHZJMm1D?= =?utf-8?B?U005d2VyM3Vydi9Xc2hLUzhodGZzYUVBSVppSFYvVlltZHovelRidy9nNFh4?= =?utf-8?B?V1JiODZubWdvNmNaUXh0bWFLcFdqdHZqNlM1ZjMrdi94MlhGSVRVL0xjRUVu?= =?utf-8?B?T0lybUp3SUtmblM1ei9FczhBMTBCUVA0WG5mYVNFc0wybE1WUWxHRGhVRnph?= =?utf-8?B?R1c0bnUzamhqRkRkRTdrNWEzUjh6M1hmZE1sTTJldVRmS0F2Y2x4cWNRdEt4?= =?utf-8?B?MFBXTlVNNFE2Q2FRbjZia1hpTHNkaGNCd3BJam4vakZpZ09FUTY1Y3VLNi9z?= =?utf-8?B?RHcwSmJUT1MzeDdtRzZhSFZ0M3gybEF4Lzk4cDZaREpsazBHK3IzNTNLbE5x?= =?utf-8?Q?GZOhIDJqIEvoCY5SEVRliK8=3D?= X-MS-Exchange-CrossTenant-Network-Message-Id: d1841cb8-6195-4a8c-1fb6-08d9d0585c92 X-MS-Exchange-CrossTenant-AuthSource: DS7PR03MB5608.namprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 05 Jan 2022 14:33:38.0915 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: 335836de-42ef-43a2-b145-348c2ee9ca5b X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: zzhdW/ADVjCRTCWjC1L1fAY3zCu+si9u3M5VJeDB7lSmcu4tr5MgFTPyNMV56mHKh7YkVzKKJn+RJYe930O/ng== X-MS-Exchange-Transport-CrossTenantHeadersStamped: DM6PR03MB4060 X-OriginatorOrg: citrix.com On Wed, Jan 05, 2022 at 12:05:39AM +0800, G.R. wrote: > > > > > But seems like this patch is not stable enough yet and has its own > > > > > issue -- memory is not properly released? > > > > > > > > I know. I've been working on improving it this morning and I'm > > > > attaching an updated version below. > > > > > > > Good news. > > > With this new patch, the NAS domU can serve iSCSI disk without OOM > > > panic, at least for a little while. > > > I'm going to keep it up and running for a while to see if it's stable over time. > > > > Thanks again for all the testing. Do you see any difference > > performance wise? > I'm still on a *debug* kernel build to capture any potential panic -- > none so far -- no performance testing yet. > Since I'm a home user with a relatively lightweight workload, so far I > didn't observe any difference in daily usage. > > I did some quick iperf3 testing just now. Thanks for doing this. > 1. between nas domU <=> Linux dom0 running on an old i7-3770 based box. > The peak is roughly 12 Gbits/s when domU is the server. > But I do see regression down to ~8.5 Gbits/s when I repeat the test in > a short burst. > The regression can recover when I leave the system idle for a while. > > When dom0 is the iperf3 server, the transfer rate is much lower, down > all the way to 1.x Gbits/s. > Sometimes, I can see the following kernel log repeats during the > testing, likely contributing to the slowdown. > interrupt storm detected on "irq2328:"; throttling interrupt source I assume the message is in the domU, not the dom0? > Another thing that looks alarming is the retransmission is high: > [ ID] Interval Transfer Bitrate Retr Cwnd > [ 5] 0.00-1.00 sec 212 MBytes 1.78 Gbits/sec 110 231 KBytes > [ 5] 1.00-2.00 sec 230 MBytes 1.92 Gbits/sec 1 439 KBytes > [ 5] 2.00-3.00 sec 228 MBytes 1.92 Gbits/sec 3 335 KBytes > [ 5] 3.00-4.00 sec 204 MBytes 1.71 Gbits/sec 1 486 KBytes > [ 5] 4.00-5.00 sec 201 MBytes 1.69 Gbits/sec 812 258 KBytes > [ 5] 5.00-6.00 sec 179 MBytes 1.51 Gbits/sec 1 372 KBytes > [ 5] 6.00-7.00 sec 50.5 MBytes 423 Mbits/sec 2 154 KBytes > [ 5] 7.00-8.00 sec 194 MBytes 1.63 Gbits/sec 339 172 KBytes > [ 5] 8.00-9.00 sec 156 MBytes 1.30 Gbits/sec 854 215 KBytes > [ 5] 9.00-10.00 sec 143 MBytes 1.20 Gbits/sec 997 93.8 KBytes > - - - - - - - - - - - - - - - - - - - - - - - - - > [ ID] Interval Transfer Bitrate Retr > [ 5] 0.00-10.00 sec 1.76 GBytes 1.51 Gbits/sec 3120 sender > [ 5] 0.00-10.45 sec 1.76 GBytes 1.44 Gbits/sec receiver Do you see the same when running the same tests on a debug kernel without my patch applied? (ie: a kernel build yourself from the same baseline but just without my patch applied) I'm mostly interested in knowing whether the patch itself causes any regressions from the current state (which might not be great already). > > 2. between a remote box <=> nas domU, through a 1Gbps ethernet cable. > Roughly saturate the link when domU is the server, without obvious perf drop > When domU running as a client, the achieved BW is ~30Mbps lower than the peak. > Retransmission sometimes also shows up in this scenario, more > seriously when domU is the client. > > I cannot test with the stock kernel nor with your patch in release > mode immediately. > > But according to the observed imbalance between inbounding and > outgoing path, non-trivial penalty applies I guess? We should get a baseline using the same sources without my path applied. Thanks, Roger.