From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from esa1.hgst.iphmx.com (esa1.hgst.iphmx.com [68.232.141.245]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id D20E127E1DC for ; Mon, 31 Aug 2026 07:54:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=68.232.141.245 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788162871; cv=fail; b=iYL4pZ+Ozhd9TPDLj/f/MRnI3w+LvRZeldBAfuaTNLG3XeLDXFvTXYh09XkYGyxDS04RQaRtsUyg+H58Qw6BgRnUB8CR78nz2/JcV25LkQwLeYUeNVznBNPu4EkKag3lXJyU4FGvPf0blN/ieCdxq7kEijO1hzvReBPXaqg+Qfs= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1788162871; c=relaxed/simple; bh=Y6jQVlOIYhUEQWFqOfjiLA5/WRA9jkpAK9GB08CfjBE=; h=Message-ID:Date:Subject:To:Cc:References:From:In-Reply-To: Content-Type:MIME-Version; b=XFPY/I6EGsOd7SqN/TiurNx+XojEkKTFPhknrRCSKXh7ABVTpi0wkv1cqDNkfGYgDcuzUX558dECTN9qBtS1KHx0bjiTa3J0gY2h7vMHcGh3TSc4t782a2hnEJLV4kW+x+yVLcqwuIeW8M+ush1VRSWv2oGRUcHXrj9UFwtUP8M= ARC-Authentication-Results:i=2; smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=wdc.com; spf=pass smtp.mailfrom=wdc.com; dkim=pass (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b=B9naxiDd; dkim=pass (1024-bit key) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.b=ihq5F8dz; arc=fail smtp.client-ip=68.232.141.245 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=quarantine dis=none) header.from=wdc.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=wdc.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=wdc.com header.i=@wdc.com header.b="B9naxiDd"; dkim=pass (1024-bit key) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.b="ihq5F8dz" DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1788162869; x=1819698869; h=message-id:date:subject:to:cc:references:from: in-reply-to:content-transfer-encoding:mime-version; bh=Y6jQVlOIYhUEQWFqOfjiLA5/WRA9jkpAK9GB08CfjBE=; b=B9naxiDd0WgUReBveWkHsevFBpu+lHXhQ2OdRFwpS0QcKIGyRt7H71YD ckwMtuqnwBT6nxdsdxm5Fv6gOVmer5wQbbuN7qyoyAOljZBS/yOEZJW80 I+qxb+0EXxh0Opu6fSqEUAT9PAygjih5x2L/3jChgxoHGu6vGm2/esL/I GRoUZYaauPjfvxB7QsEcHSUtlE7zkWdZLqojDrhJij3r0QLlDRbs4m9/R nY5a5xellmAIsA52wEKPET37nx5sMLidsUwcVBoKIwGLLZ4xlIoymqHFu b1qVeSDwIJ4/Zf4TYrU5i1yv2131lp5lGhlJe6U9VNmpFwHTrl7yMaZ4X A==; X-CSE-ConnectionGUID: C1vKvbaNTCSrdCBnuYfZug== X-CSE-MsgGUID: QDLY9jX/Sq6ECg9zGCBsLg== X-IronPort-AV: E=Sophos;i="6.25,252,1779120000"; d="scan'208";a="154385716" Received: from mail-southcentralusazon11012067.outbound.protection.outlook.com (HELO SN4PR2101CU001.outbound.protection.outlook.com) ([40.93.195.67]) by ob1.hgst.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 31 Aug 2026 15:54:22 +0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=qdpzR9TBGbjbVlTM7iDyYkCKt7C7sA9EBeM02opPJzIiSV+pefNwQQ8kgyCufLCGdq4ZJZ+CuC/dxmChjU0KruTrafEwJlK7MiphRyTEwqEMhP6mv3ZsKXu9IjpyyDwMFVZEVrVTdi6sJLHd9PUX0Dhmdrnuesp4//ZXUnFl3IHcPkF1LSVGnsSRlFy9UTx6sK6oHHy3nWPPv3icH4ri2b9hvxolNlmk1sK9DdS41qH5sO9bay36nWu6jtBe3E6N0Qz0xGmQxvtplXSTIWR/hAcuQOLNmok1beFS0b1A+AfXFMb3VxsFcCsZ5gq8HeNULjOLY+DTSjwFXsgBvDYrtA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=microsoft.com; s=arcselector10001; 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=8X8NOgAjvrOx+0JhxFQlLrCGw36vwlPyPtLrozu2+XM=; b=Gyz4HF0d6SR9Z9OkP+j7TcypCkht9R8vUjfBlDXl9+Ianj1DKCgXeVocH3CoHYm+DyuO/UdFlGaz+YcZNfz+rN8kx+wzDLQvDMdUigl/RotCyIg9Rma7Hlj5naADTgoJ1k2gT7uv3O5nD5uzQFuoPpRkGXlgMo0eUFlgvoow4i0jFvESHShor8ezdDmLc4Fgcnlm3uNa3r2RZk35VmXdUVQc1tph8mepTb+4MiN/Je/Ahh+QZAk7KTvGCWVJlzmrT2PK5X2ziCaICkePDisFe+vtl0W1dVlSGjv1mA2zkaC8k0r11FuXTxiNwiSN1mFJash2hU88T6F5JEYm3O3YBQ== ARC-Authentication-Results: i=1; mx.microsoft.com 1; spf=pass smtp.mailfrom=wdc.com; dmarc=pass action=none header.from=wdc.com; dkim=pass header.d=wdc.com; arc=none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sharedspace.onmicrosoft.com; s=selector2-sharedspace-onmicrosoft-com; h=From:Date:Subject:Message-ID:Content-Type:MIME-Version:X-MS-Exchange-SenderADCheck; bh=8X8NOgAjvrOx+0JhxFQlLrCGw36vwlPyPtLrozu2+XM=; b=ihq5F8dze9H2IYfFmuTeY8u9xv4Q/gTlbup2998RJ0o/nhhhyHtLCW/oOaGQo+iBDO5dZuBcE/16YIN7wfx4wxTdYI2BMsCALacwSFmaRvquZyQPmFjh4Ql7cjVMGG+BB3zYh7ICvT9C3RPRBhI7imVdVFcWqN7KCwlq2Wn9/iQ= Authentication-Results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=wdc.com; Received: from SA6PR04MB9447.namprd04.prod.outlook.com (2603:10b6:806:436::21) by CH0PR04MB7986.namprd04.prod.outlook.com (2603:10b6:610:f8::22) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.21.360.13; Mon, 31 Aug 2026 07:54:20 +0000 Received: from SA6PR04MB9447.namprd04.prod.outlook.com ([fe80::14c6:1c14:485f:1825]) by SA6PR04MB9447.namprd04.prod.outlook.com ([fe80::14c6:1c14:485f:1825%6]) with mapi id 15.21.0360.008; Mon, 31 Aug 2026 07:54:20 +0000 Message-ID: <2b004f8b-a787-4a01-ab8e-5f6bb28a9421@wdc.com> Date: Mon, 31 Aug 2026 09:54:13 +0200 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] btrfs: use IOMAP_DIO_BOUNCE flag for direct reads To: Qu Wenruo , Christoph Hellwig , Qu Wenruo Cc: linux-btrfs@vger.kernel.org References: <1219d8d9ed105a922d9af6130e08532e2907ea17.1787909265.git.wqu@suse.com> <74188ab7-96d7-4536-997f-926a5a845f79@gmx.com> Content-Language: en-US From: Johannes Thumshirn In-Reply-To: <74188ab7-96d7-4536-997f-926a5a845f79@gmx.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-ClientProxiedBy: FR4P281CA0326.DEUP281.PROD.OUTLOOK.COM (2603:10a6:d10:eb::19) To SA6PR04MB9447.namprd04.prod.outlook.com (2603:10b6:806:436::21) Precedence: bulk X-Mailing-List: linux-btrfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-MS-PublicTrafficType: Email X-MS-TrafficTypeDiagnostic: SA6PR04MB9447:EE_|CH0PR04MB7986:EE_ X-MS-Office365-Filtering-Correlation-Id: 3a6a49c3-ea6c-40cd-d422-08df073510c4 X-LD-Processed: b61c8803-16f3-4c35-9b17-6f65f441df86,ExtAddr WDCIPOUTBOUND: EOP-TRUE X-MS-Exchange-SenderADCheck: 1 X-MS-Exchange-AntiSpam-Relay: 0 X-Microsoft-Antispam: BCL:0;ARA:13230040|376014|1800799024|366016|23010399003|10070799003|19092799006|18002099003|22082099003|56012099006|11063799006|10067099003|4143699003; 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:SA6PR04MB9447.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(376014)(1800799024)(366016)(23010399003)(10070799003)(19092799006)(18002099003)(22082099003)(56012099006)(11063799006)(10067099003)(4143699003);DIR:OUT;SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 2 X-MS-Exchange-AntiSpam-MessageData-0: =?utf-8?B?WHIyZ1dmMi85UlJoUjAxbURLRmg5emF0ci9scmxwQnU1TE5abFE0SEZhdThE?= =?utf-8?B?cFFvNVYrNFdwMEM2TjlPWHV6c09oZWpMa3pmR3RiOUMzVjdMV1pXUHl2Y2ZB?= =?utf-8?B?Rkptb3lSZkMzVW5CN0RoMzNEbk1IRGNTaC96UkJScGcycjZUeUhicEI5Zyti?= =?utf-8?B?SDQxY0EyOGpwbUU4NURlWExEeGRQSWtOZzd5c0htQi9Sb1RlT1lEMjFZVmFa?= =?utf-8?B?OHprSVVUK1VXSSt6S203d2VFOVV2cGxUa3R6Z0plRENTTEVmVmJoK0Z1eEhR?= =?utf-8?B?UTUxZThzZUJ4Rkd0Y2tKM01xQ1pSbXJ2Q094YUlMWTZuQ1NMT01sU3JXUUtK?= =?utf-8?B?Ylg0UUc0T2tXZy94UjNwRFZFUjkrNHNsOEl2T2pHb0tmODVRN3hLVXZVdjFX?= =?utf-8?B?K3lRNEo1dXlzUGVweTZyRTMrQ28zaUt1dUVvVm1weFhIZTBzQTgrWUZSUEFW?= =?utf-8?B?czdHUk5NcXFWNVZUanlDUlA5M3F5Q0U5aVJiM0swNmwwK1FEaDdJMGhlaExr?= =?utf-8?B?VUU0L1pVOXFBd2VLQUZQaFc1cm1tWkZsald3TmJpdWE2dmtvNmQvNHE3T3RU?= =?utf-8?B?UUdYUnpPV2RPeHBra1lmQ2tCdjVnTWxEb1lpSExXVUhWTklwUnh4RUVOdzM5?= =?utf-8?B?MkxiQW1TODVyczJYMVN5WW1ObGVzeWh5V2lFRzBiTGxBbE5FcnJzYzhrMHYw?= =?utf-8?B?M2xSa0I2ZlRVWTdBNEgzaHFWbGpyT0N5NFBTRUhPODljV0M3TUV5ZFp1UHlG?= =?utf-8?B?eUJUVGQ0d1k1R01TeEZuWjRveGpGNXpZdnRSV1pubjd0djY5WFBqZzlKbFhz?= =?utf-8?B?Nlp6b0RuUFhEVEpXQTZTN2dZZEZPdzlaWlV3WjNJcHAweUhTWjN3OHpxMVhl?= =?utf-8?B?aXRMZWFIUFBKRzNNZWR5WmlLMVB3TllSdFo5MHJlWkV3ODJTTXFlVTJjd25y?= =?utf-8?B?Ymw5Z0xGa0UzNzJ5Ty9wY2owQzJhZE01c0dZUzRnR2ZSSWpWVFVmMWp0RFY3?= =?utf-8?B?UHlyR0tpaG5CZjBKRmFIQ2w5TktxNDI0NWxVNnd4TzBlR3R0YkhJWUhlNFpI?= =?utf-8?B?K3FZaTFSb3d4L3B6VUNIZExrVDMvcENqQlFYQVhnSDJwQ1JFMGFTMHlMQytn?= =?utf-8?B?aFJIN2tLaDNxdGtETnJ3UGJteEFUMElhYlJoYitweDJpeFYrWG9JQ2crbzU4?= =?utf-8?B?UldnSUxIMncweWtMWEErdk1vSXV4eVVIMEUxNXhLajA2REIwTFpDcFJETzIr?= =?utf-8?B?cVkxQWxCc29lVUVpUGU1dGVJNmdncWs5WmRBdlZKSTYwZTZwZVdscGVRTzhY?= =?utf-8?B?cEtpQmp0LzdrVXBqZi9Rb2VPQkxpTXVyNzlldVdwaHNtb292bkRkTFltcTJl?= =?utf-8?B?UGdrd1V3MHZZNHFnK3lQNitNamN0UkVaRnlVR3FlQWdIV3haUHlibXZpYWpt?= =?utf-8?B?YUxZclVKYjA5VlB6SDNRWHNGOW5aNWNteHo0UXNLNWdjSi80VkpDbi9pN1Rx?= =?utf-8?B?d0FCTjZWaWxtOGhkWUZzc3U3eTNvRUlOYnB2NURqUTdKN3NKcWdqemVJeHRj?= =?utf-8?B?VnRoTEVwMXU2WXlBdDRsT2dNS3U5aUZhNWFnZ01JWGlxN2s4QWE2YWdPbjVF?= =?utf-8?B?KzFJQTdGNjBSZSs5dHNTZE1MM2V4d1dKM3ZHNURkZ0hPY1ZSKzQ2SHpOenk2?= =?utf-8?B?cmVudGlzbENFOHo1RGZYN3lPbmIwL2NqNG9iZ2JNdzlOblNRb1JpVU5zNUhu?= =?utf-8?B?dGdiazRKSTdqZWdqRVpKTGJWQXQrWEt1SHloQktUc0J4VHp0Sko0MXQreWhP?= =?utf-8?B?SEtxSUpFUDdiVWt3Y3lqejJZMFBXRWNNeVg3RjFoak0xZzd3a3lnWnFqV0Yz?= =?utf-8?B?R2tOc2NVb3pFSE9zOEpadktlQktaQ2ZqNDhWL2VSeCtsSTIxNURneHA1NzZk?= =?utf-8?B?Ny9iWHoyK3h0bFh1TEdIMGdlWTg0Y2VlOHNZS1dYTGcvWTZQU2pWRHRBcmxK?= =?utf-8?B?T1kvRkNCZlE4U3o4SkRObXpkSStSY3dOUkYvQk5nZHN3aVdlUFVyK0s2RjZH?= =?utf-8?B?ZmYraGl6dDJDZVFPMC93Wk1pL2UvVVZUTHFncStwZi9sTlU5SEJJYzl2TWVR?= =?utf-8?B?SWsycG9hUWRrS3VNT2hSMXBjYzhyT05xZUpVcWs1d082YXR5bzZLUnI0ajBs?= =?utf-8?B?M3FsL1N0WmNMeVowVWU3N1QrOGgwWjd3ZU5PVlFlc0RPU2tZdjZHWGZHMUNy?= =?utf-8?B?SkJweFJLM2YwN3ZrN2FrYWhiL3RKcmR0cW9oV0tGeHJHYXRESlpYVXArRkww?= =?utf-8?B?ODVtUFlVallYc3NBOC9nMFJFVXgzRUZvZGFSVEhKWDU3bk5GNCszRFdSUFV6?= =?utf-8?Q?SnIOzIjpdZC/dYCbLD6J77kfZEF6pzOio8uGRCe1UurO6?= X-MS-Exchange-AntiSpam-MessageData-1: 80tH+b0RkfwIV+0UvbG8NwNDGYqrYRyDDbY= X-Exchange-RoutingPolicyChecked: bcmMc1xuqmKzpj3lF7oRNHNqKKP4ASXO7aynI2Iyy7C6NNTTuwu/jEqJqrPQhsWoclY5Nn7HjPmqr++YIqmWXA8dxZBay9WUKKHGpqwmGNeGWtQEfLtgsmKkr1DTgfhpOjXiudN0ev96dGrGFJlksPqZjvSd175kRJwMYs7j3UHs2k65gCaEnw9mJ3lYjkar/tQrEeMyFmG5BrN5QKXRlVp0r6CNNFglbdhXZmoGXiJTNi7xz1QZ+vCozl0dNGrV1W+BVQAsJjkDWIuSMdtmh9UwRoX7PCEkQQqsYuRpPbisYHHDCtYJ2H8wNkIvDEOUh4U1Rfyttr/B+PuY4RcQYQ== X-MS-Exchange-AntiSpam-ExternalHop-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-ExternalHop-MessageData-0: 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 X-OriginatorOrg: wdc.com X-MS-Exchange-CrossTenant-Network-Message-Id: 3a6a49c3-ea6c-40cd-d422-08df073510c4 X-MS-Exchange-CrossTenant-AuthSource: SA6PR04MB9447.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Internal X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Aug 2026 07:54:20.6581 (UTC) X-MS-Exchange-CrossTenant-FromEntityHeader: Hosted X-MS-Exchange-CrossTenant-Id: b61c8803-16f3-4c35-9b17-6f65f441df86 X-MS-Exchange-CrossTenant-MailboxType: HOSTED X-MS-Exchange-CrossTenant-UserPrincipalName: 3X65+2TIUzghyC0HlqzOYorsWtK54tv087kgz0EPfeFbR0QX4ogWswEztDsoctfizRfHPxXDsTp/YVLIA5VWTysVC+aZDAA+T+PeRuWn9S8= X-MS-Exchange-Transport-CrossTenantHeadersStamped: CH0PR04MB7986 On 8/31/26 9:31 AM, Qu Wenruo wrote: > > Thanks for pointing to that series. > > However it only shows up in lore, but not in my inbox at all, and I > have no idea why. > > And lore is never a good way to review patches, nor easy to reply. JFYI: You can use the "download mbox.gz" link and import into your MUA.