From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from esa5.hgst.iphmx.com (esa5.hgst.iphmx.com [216.71.153.144]) (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 4DABC327BFB for ; Mon, 9 Feb 2026 07:54:41 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=fail smtp.client-ip=216.71.153.144 ARC-Seal:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770623681; cv=fail; b=RmhQFnVtPdQ3YFGWvFz7VBF/W/rCo12l573LZndefbyGNd/NdSigw2of3ITC1F5+SUDEHvWdXFyo6pyy76CEoYvPui09yPWCunPOI5DM2TnVs7S0CGaCQR1a0pa9hbaZq5P+Rkb1gnGoTWN3LEPVJQcJGWknwrsXdIDz6Zp8pBA= ARC-Message-Signature:i=2; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770623681; c=relaxed/simple; bh=RiP3rb3y+ZKQ79YoY26vXaPldP0mgYITMUw7ymvlzIw=; h=From:To:CC:Subject:Date:Message-ID:References:In-Reply-To: Content-Type:MIME-Version; b=VtR7GzpSq/1JUvonkaLgYQpcS8l2tgIi5DVVK83+s+/vP7qQiKiRnHLgasyQgi6Z+i7zGLTVOeXFtUOA0LDkGeS7iZmoH8ihlcGabhIsfjs1mGo8mfwnHASWEDd6B5pialyTe4Ts/lKcVMUj2+jrFfWUxqKRbJUdX0UEJHBczhY= 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=WHDB9guE; dkim=pass (1024-bit key) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.b=Jl510gli; arc=fail smtp.client-ip=216.71.153.144 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="WHDB9guE"; dkim=pass (1024-bit key) header.d=sharedspace.onmicrosoft.com header.i=@sharedspace.onmicrosoft.com header.b="Jl510gli" DKIM-Signature: v=1; a=rsa-sha256; c=simple/simple; d=wdc.com; i=@wdc.com; q=dns/txt; s=dkim.wdc.com; t=1770623681; x=1802159681; h=from:to:cc:subject:date:message-id:references: in-reply-to:content-id:content-transfer-encoding: mime-version; bh=RiP3rb3y+ZKQ79YoY26vXaPldP0mgYITMUw7ymvlzIw=; b=WHDB9guEFCHmdrDCTCv8/5zZE/dOnuWpmlW4JvwLWSEobG29YdhaU+Yg xjX3zyDmLOnpYS6Sw8FgRtBXT6nsLBx9YhM3aNuNTIz6oDs2SmczpOmdz PWSgmDrSjcjeaBxDfcXRWmkH5RYXGLyE3z6SW9hhJ+VAut0Eg/nwx5gte 7jzFlybMICunP4T7ZInLsO+2oPoFaN3EvLQ77esdxjfhGxw4pJ0u2Zdx5 7VUQvoiYxHFEmIy3k+YGQpqT6n5LC3AcjRiw8LzQQDcoEeBTzWC63WhaE tQTv2Shdo+8ldOihvQ+LM4u7V9fg6nw4+EK5XT4Bw0YrhjpJJLECgHs58 w==; X-CSE-ConnectionGUID: VNTz2lRaSnqeS6gZiU5xSA== X-CSE-MsgGUID: tjbYch24R46WSphcnnNQWw== X-IronPort-AV: E=Sophos;i="6.21,281,1763395200"; d="scan'208";a="140042710" Received: from mail-northcentralusazon11010059.outbound.protection.outlook.com (HELO CH1PR05CU001.outbound.protection.outlook.com) ([52.101.193.59]) by ob1.hgst.iphmx.com with ESMTP/TLS/ECDHE-RSA-AES128-GCM-SHA256; 09 Feb 2026 15:54:40 +0800 ARC-Seal: i=1; a=rsa-sha256; s=arcselector10001; d=microsoft.com; cv=none; b=bGuByFS8c3CRx3Pw1OPU1Gcw5Eg0p2H5K4AHkmxzKWqK+X81JWQPPWlIwJqhC07hSSNLs0sKKprP3isbnAETMRUSPUZKpvT31X/tmcZ2OVvb5BEi4TEpXcPRKSciczvZZkUALUNmhl0z2DNZO/KIRYWZmfG+HjLK7TZxzSO8TZAJi0oSqhbsyaXkpTYfmXNwsSvdOVWUNt2wA5in2hUMtiCuivxkjLTtVmyzi8U4v+0iRsyeGyKRsEQM0R5RZuRT55foJgBlgul/J7EIp58mAKqv5FPSZB/Nn3supdpx121xVWsZQlZsdLO+ZKWrkkQ7tP9zbhs6IAqMDPj0I2qN+Q== 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=4UCl/9F5i2HcW7k5hDn0XO9/yR4PsqUBGgi26khHe9g=; b=xhuOV+U5AT9AGRxakQ/TzC6JBpKMtDfRevmclXKQCuPrXn8MCjUaHIzeVWqH/lMZi4AnlhJ74dqidt8O7Q7d895ZO9ThcYIdSO+wd8o6sK95RyxeBAAtITPG5MZji4Px+awkL8Y1Ys7/QSygASp1OeLTfbayzY02kXJpEjz+oChSDufnZcQ/PX6Wrh6URUv+BdwmIes8WBmqcTKxceuX0WYtnGmtYp+D3sZpUzbd/JLIyuT3WRuNSVaIRy4ivYX5qlGPfDTlTmIzT8lRCbHH7T/rv7XgLUOjJGbYHB7khm7IuTCqjneCWNmaMdOyeK2ZyIDZVCdbDmHi4RLpmpJ4UQ== 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=4UCl/9F5i2HcW7k5hDn0XO9/yR4PsqUBGgi26khHe9g=; b=Jl510glio5TI5qtomRFf/Z1bj0Z3bhY1BWGKVvZJACTXWT4xs8wYuNesSejtHMzNQxo+0oTDf23t/SVmg6TZHM+50eD5xP6tVeUV8mFcgjhzHNuBGcwCc8i6Ye4qI8B8/FIl/WzQzF75lVWbplnBZS2EL+UguvNZSeyYVEZf+qE= Received: from SN7PR04MB8532.namprd04.prod.outlook.com (2603:10b6:806:350::6) by LV3PR04MB9260.namprd04.prod.outlook.com (2603:10b6:408:274::5) with Microsoft SMTP Server (version=TLS1_2, cipher=TLS_ECDHE_RSA_WITH_AES_256_GCM_SHA384) id 15.20.9611.8; Mon, 9 Feb 2026 07:54:38 +0000 Received: from SN7PR04MB8532.namprd04.prod.outlook.com ([fe80::4e14:94e7:a9b3:a4d4]) by SN7PR04MB8532.namprd04.prod.outlook.com ([fe80::4e14:94e7:a9b3:a4d4%5]) with mapi id 15.20.9611.004; Mon, 9 Feb 2026 07:54:38 +0000 From: Shinichiro Kawasaki To: hch CC: "Darrick J. Wong" , "linux-xfs@vger.kernel.org" Subject: Re: [bug report] xfs/802 failure due to mssing fstype report by lsblk Thread-Topic: [bug report] xfs/802 failure due to mssing fstype report by lsblk Thread-Index: AQHcl0QyMGi0b3KRKkOnzTIETMr5/bV18CqAgAO+3ICAADcfAIAABeSAgAAYG4A= Date: Mon, 9 Feb 2026 07:54:38 +0000 Message-ID: References: <20260206173805.GY7712@frogsfrogsfrogs> <20260209060716.GL1535390@frogsfrogsfrogs> <20260209062821.GA9021@lst.de> In-Reply-To: <20260209062821.GA9021@lst.de> Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: authentication-results: dkim=none (message not signed) header.d=none;dmarc=none action=none header.from=wdc.com; x-ms-publictraffictype: Email x-ms-traffictypediagnostic: SN7PR04MB8532:EE_|LV3PR04MB9260:EE_ x-ms-office365-filtering-correlation-id: eb05b0f0-44e1-4186-94da-08de67b0797b 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|19092799006|376014|366016|1800799024|38070700021; x-microsoft-antispam-message-info: =?us-ascii?Q?sQsz9MNzQbI39ZHBp3P3VZaV+P9fQJqERK6oy+w1wbJFSYKY87SM1sWTPjm+?= =?us-ascii?Q?rMLPQhzHeNfnqOgGtl7jpUenXpq3LQp1xQEIrHgK6Nh9uA4Rbjdd+jpZ9+2f?= =?us-ascii?Q?eG8H0MzBqcT5UlIzU851bHwG88wONHKoP4FzYcoA57dzZq/9TL8B2r4+K/MC?= =?us-ascii?Q?j0FJLG6TfYB59CFAXo0SPyPwvk/LUhsovIyXgwNFh/ma5zoSNE8vZBDi7Zwu?= =?us-ascii?Q?1RpenxPxNFZr9FN4iBqfyRgXaI7NT6vpLIGV/xvybzas4fY6wA8VHA/zSmaP?= =?us-ascii?Q?CbOeczXy67B3bsFC59mJgYopE3kKYWqnwrykORPkt1Ta/ztxiOcMLiehyx8o?= =?us-ascii?Q?fwX58N1H1O4ZXXLFhhkTRHcwWn2t9k3Ej3CQ/4HgQgciVYx8S7FbABjfJ2Fq?= =?us-ascii?Q?0k34xs4kThmaEFig/GEmpK8iaMFgdRefqpB2up9Ym0/nrmpkFh0KHV2BvTWg?= =?us-ascii?Q?mmqq+yOZ5EwC4o+GKDD2qV0AM+hzq1yQBE9cnpvp7gmqEuDxytwj6i9wMDzb?= =?us-ascii?Q?unWo/Tv5mDXZ2cifXmXNqvZEtly+nNjIq7Nvgv8rd5dObnKOMe6eakwJTUL8?= =?us-ascii?Q?kwuaw+mb+CPmlAIrEFHjM5JB1MbniZzujV8jQmE70JkSKHuyqzARw3OQe5b+?= =?us-ascii?Q?hWudUyVaNFNUlkPMyEY0XZZ4qVt7CXG1oMIFbLa98jxGEpQPEfPvi8xwS2Xs?= =?us-ascii?Q?U1jD3Kle2/Kuuvyrw7K6znQRN6erOn4e8MVim3Bg7NUb057IpZWR7izI5uyD?= =?us-ascii?Q?as/4Z5cSHZH6MCz/Luv9qsE64qTNOOV1QSLFzU7yZfGVAmL8zhYuuJzzJnVx?= =?us-ascii?Q?WfbtPXfbDmg0kUsa26jZzYbUjfSvH9wEfXTRp79eus6aH62C2vP8H4fZSVIa?= =?us-ascii?Q?xNmihFu3jOnY6saqRrdDPdOYIh/j4k0FJ1eVn9EtiPq8kO+EyY6Zwd+FgFuV?= =?us-ascii?Q?cffSGJPEZtkSdY5Kr9DnzxEOh53bOi0JZhQMPycJUtaS6NHxxAY0DnjquibS?= =?us-ascii?Q?A8TJKSpHn6XvSFLJD+ICxq1lGPZncxcm2kt7xuXqhwOZhsy4eFPle4VaZ8Nv?= =?us-ascii?Q?mmuAzs3OabiO6UCaTyyd1XWXX8klIyef4n0igTuUrBhL0FiDwmzjgdpqOs93?= =?us-ascii?Q?TeAEYKDcZqazg7Xpa1qSgb8JH9rlg7UHh0V5pZT8Dtg2OdTeCFASqqWfEDsR?= =?us-ascii?Q?FNkvvqxxVAEZvJN+OedtB1rJgP4BOOCKmj0fhsKl/CaSNE7UdGglOG5PG83T?= =?us-ascii?Q?p3wOJwOT3cfaYka+4kP77m9tWnc/SxQeWLIZGQPzTWBaHj2r9Q3sc2tfi4st?= =?us-ascii?Q?h07wFliAlYtl+nJPb5JqXE+XgjGLO/3MVtHov2R7tLnuP940kw4K7Pr8HvOo?= =?us-ascii?Q?fvSbJT3nzJ9Z6vorVJIX2Rk0YlB0KuT6g+W2zJom9k69oVQSXp56j+sOCsrk?= =?us-ascii?Q?vGfpFBfiUnISmj4I8qaFm+6oKMh9l2x+aRLOh6xkXRYAyCWDWf1lQQnLoe7C?= =?us-ascii?Q?p3PWhP/quP3sItqO6bK97eo78uR3xDDHNoO4lCqJ1+9Hs0QMwWfdHR68GNkw?= =?us-ascii?Q?bQbqf2J4WJlk7DZS8RyXT+o5pOONoVWji7hexRsknI9MO5Xs6/I3UE3c1SAu?= =?us-ascii?Q?Z5rvV4SZR9SA9N60XkE0bTE=3D?= x-forefront-antispam-report: CIP:255.255.255.255;CTRY:;LANG:en;SCL:1;SRV:;IPV:NLI;SFV:NSPM;H:SN7PR04MB8532.namprd04.prod.outlook.com;PTR:;CAT:NONE;SFS:(13230040)(19092799006)(376014)(366016)(1800799024)(38070700021);DIR:OUT;SFP:1101; x-ms-exchange-antispam-messagedata-chunkcount: 1 x-ms-exchange-antispam-messagedata-0: =?us-ascii?Q?yb+5n7YB9BiSGCWb21a0UVO1P4HE54/+HAm7h7f3yGOwLttE6OsIaCxCo11D?= =?us-ascii?Q?1DGFzu5WxP1UbH11p8X93gbmpodw00VHSvAF4K9hfUcoQ2r5WmceUu5RDnYg?= =?us-ascii?Q?QMvgxR7P+93fcZ8F+V2MqQnKKBNkwHnSSaXXCTSGpFP1lkQaV7wkJr/nJIq9?= =?us-ascii?Q?DoRkLJJVwsitzUprolih4FZlZATZevU4DvE3oNP0M+AKWbpOG0LXQGBHOoAZ?= =?us-ascii?Q?nE4Thn7md6Tqti7t0sS83d7yjcFVV2lNwRtXZJuu3guctOjGKc6Vo7HZ7S0U?= =?us-ascii?Q?gC+6+jJQmgFHu1py3WoeziMtJLZ38Q8tPMHr/xxtcl2hLLmpbkeLwCWOqzpo?= =?us-ascii?Q?NkorcxKfVl4ppXDGjgRXv1mb9gXCk/Tm7FaKgcgnNWaElJEZTYu3L0du5i7x?= =?us-ascii?Q?tdQFam3/8Q5EFDi5DGfSNO+q6XVbf17Zhz/AmOXu5NQgypMx5ZHqWkxT95LJ?= =?us-ascii?Q?Ol+7MBwFu1yA9NRfw4zYBI4Z8vyfVsqgqREkRY14UXyuxM8KSjjJ7BYhR8mU?= =?us-ascii?Q?fymcRWncoc7Rmyng7AtHR+QO4tHE8XxMnTZ0T75xbZiGhCSNT4d7GsTf7Rcq?= =?us-ascii?Q?Oo+lyPEchkXdgYS5Q3vY1vframQp10E7aqIHOk/MJQ2QOe81I000ozu7y9cu?= =?us-ascii?Q?Qgd8V3u0n+IZ91fYrvF8W1T+Jm/KPvYVEKEzM289dG9V+ulsNZkkfpjKLjCL?= =?us-ascii?Q?0F6H0CkoYvQLBNg9XvoMpo9so/RLdBY08HwjsvTapHayUA7oIfaTR/hNpVhK?= =?us-ascii?Q?QLwYhq+nMYRn1IOt/aJV9PI7eRPf5QaVlBXL4W1zNt8ZXznYtzOV5zV/9pt5?= =?us-ascii?Q?rtrS+b+VKnt6buhWeCpLH/g9P+oWENQPCP9SJsXxsY5K8DmpHNDAejseQvc8?= =?us-ascii?Q?g73cJlv7VSMka/aUGTiuH1ywhPvq14DABa0uiRJVuMmg9Mbzb7NL+1fWzC0m?= =?us-ascii?Q?jviy2XlQhEhrjzKQ0lYSJQt6vIjHeVpiNEy8xOeLN9sMOb3N/3S4lj3QhjkW?= =?us-ascii?Q?pq6Z+Cmny/l6xJhJ7qi13LXau9UtZ13X/jUs4HsG27TPqUzhxjIjyabbKp8o?= =?us-ascii?Q?72c7IXTLuNvuRD3bKoMSbjZkT9bKrOL+EgLT5XPtMK0eFEwvJUvTRWR4pw8n?= =?us-ascii?Q?pl7tDPQbfC8liRfWlKDTOfQiDoNiQoGRbpZG/CybeZI05iM9uw/i008BQ8U3?= =?us-ascii?Q?lyNAYuM2+zHvevLNngxSx4MGjz38IzedycvS7cpD8ABSt8igHbvRV72GAWW2?= =?us-ascii?Q?BJcqfQWnVuuEwCsVYhziJeixtFjFg64rh3NVhBjvHYguuOd8tU9TjGqNRNoU?= =?us-ascii?Q?YfaCM191Cq5us3LKQw/JqhjqH0QAe8pY8OsqrBUATG0Rta0om+tqlrIYagy/?= =?us-ascii?Q?0IIFFDY8XmgomAze13tcGWKxeVmL/zWt2EQEJatY6KOkqvNvDtxmdDKJkkRi?= =?us-ascii?Q?WHvhki4bMGPRtr2LTgXemhlRbEFasR6iHphsLBndP3HncxVswLoCi8VV3F8C?= =?us-ascii?Q?1l+w3fWtq7aBg4p+Y+32Bn0iGTt2X0b5Jm3XlXGXbtqEbH0VGc0J06XnB+Ix?= =?us-ascii?Q?koITocE4d5yMhKsWYbxrnyUd2nByp3TDHailIL1hugZZptoLmpD8vXHNZ2Wv?= =?us-ascii?Q?KAxUVp/aZVSTKS/5DCXYSz4VaiRBWbT59xwy2/HKbUfaEb/xRy1MamB/AGGw?= =?us-ascii?Q?UqrjFL7Dcgmpb3GnWaQ+iJxoAf0WH3SNOITZZzOhtmbK3KtfB0FcIwcgG67k?= =?us-ascii?Q?DTHzC1Ti5g8PZvN5hIj/0I7zsV8c2D4=3D?= Content-Type: text/plain; charset="us-ascii" Content-ID: <2D24FEB716DDA8448F620059DA69A203@namprd04.prod.outlook.com> Content-Transfer-Encoding: quoted-printable Precedence: bulk X-Mailing-List: linux-xfs@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 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-AuthAs: Internal X-MS-Exchange-CrossTenant-AuthSource: SN7PR04MB8532.namprd04.prod.outlook.com X-MS-Exchange-CrossTenant-Network-Message-Id: eb05b0f0-44e1-4186-94da-08de67b0797b X-MS-Exchange-CrossTenant-originalarrivaltime: 09 Feb 2026 07:54:38.2636 (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: sh54SpN8GJPM85yEl7gDZpFs6P+kAN6UIUn70KKCGqMB8fa68B47j9QKWfNwxR6aQBWat5cfr1YckG1geSrHqWhbwP1JmCSoSdUp9Y5vXS0= X-MS-Exchange-Transport-CrossTenantHeadersStamped: LV3PR04MB9260 On Feb 09, 2026 / 07:28, hch wrote: > On Sun, Feb 08, 2026 at 10:07:16PM -0800, Darrick J. Wong wrote: > > Waitaminute, how can you even format xfs on nullblk to run fstests? > > Isn't that the bdev that silently discards everything written to it, an= d > > returns zero on reads?? >=20 > nullblk can be used with or without a backing store. In the former > case it will not always return zeroes on reads obviously. Yes, null_blk has the "memory_backed" parameter. When 1 is set to this, dat= a written to the null_blk device is kept and read back. I create two 8GiB nul= l_blk devices enabling this memory_backed option, and use them as TEST_DEV and SCRATCH_DEV for the regular xfs test runs.=