From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from outgoing.mit.edu (outgoing-auth-1.mit.edu [18.9.28.11]) (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 8F6DD14D714 for ; Tue, 11 Jun 2024 08:52:38 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=18.9.28.11 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718095961; cv=none; b=Pw3STukOm9za3fq3ETmVinmiCfV57TGzopy90HWxwxMUlQDMmdC5Lz/8yUsd/yGTORykMQaRIEiUCi5s4Zr+IcCBv3+4CL04Bn/rsZUzeKeTbg8lgZxIg2f+GaV2OWKWFeDGeBxFwNtC5r7asPN12AvrgamGhH+WuI7nFxb6YoM= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1718095961; c=relaxed/simple; bh=e1jKfrVJvNRUjZ1G7GMXs/Auo65RBO7a6yZMmElGgzo=; h=Date:From:To:Subject:Message-ID:MIME-Version:Content-Type: Content-Disposition; b=FmPQA8aa48tKsTVH6lYVezBzdGgQKdUkyb30QcoxELTwFs62KZsRKk/hzkzMPp97lVB3hHqxnFgEq8230+3+F7l8Cu5Kws4MxPzQMwHFI3VbPDYxYfakGHVNth4Uw1i3mxo6zx/f+jd2q0spjB2B6/VaEDavaytRG7eLcgYsFSI= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mit.edu; spf=pass smtp.mailfrom=mit.edu; dkim=pass (2048-bit key) header.d=mit.edu header.i=@mit.edu header.b=nkumsAtJ; arc=none smtp.client-ip=18.9.28.11 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=mit.edu Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=mit.edu Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=mit.edu header.i=@mit.edu header.b="nkumsAtJ" Received: from macsyma.thunk.org (unn-37-19-197-199.datapacket.com [37.19.197.199] (may be forged)) (authenticated bits=0) (User authenticated as tytso@ATHENA.MIT.EDU) by outgoing.mit.edu (8.14.7/8.12.4) with ESMTP id 45B8qFri013014 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-GCM-SHA384 bits=256 verify=NOT); Tue, 11 Jun 2024 04:52:23 -0400 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=mit.edu; s=outgoing; t=1718095944; bh=SeRNdQn2ssqgKAus6AWOugRGaJLxS3fn0v7E7U0Lyaw=; h=Date:From:Subject:Message-ID:MIME-Version:Content-Type; b=nkumsAtJuXUyjG1S4kNF4T71+CDE1Sg/+yCCOV7PWS+Z4p0BcabCql9o97LZtT7nw yns/TZjLhbFNIwaR1wC7P6pkKC6AzJqJEsEjpOIlKMBX4vokEsqdSuNGuZBvCgi5Ll 15gRYpAICP/GYnW+07M6y9t79Jr0vmHhCi2nJV04+V+1e0IFqogn42h6LJI/LiiXkt T9qH4fnJV1jTsJwVTrYmsU8q5ItIDDMvKRci09fq1IBlM3KGCNCAG3s8hf60qYphuT FxDFxtsBnN73ColJVKZfIgiplQ6oQJuzZHqw3njI+1sHOcBTSD4mFRFaN1BTvgd3gk fGLIm5pt1mmHA== Received: by macsyma.thunk.org (Postfix, from userid 15806) id 67DBA341669; Tue, 11 Jun 2024 10:52:10 +0200 (CEST) Date: Tue, 11 Jun 2024 09:52:10 +0100 From: "Theodore Ts'o" To: Linux Filesystem Development List , linux-block@vger.kernel.org, fstests@vger.kernel.org Subject: Flaky test: generic/085 Message-ID: <20240611085210.GA1838544@mit.edu> Precedence: bulk X-Mailing-List: linux-block@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Hi, I've recently found a flaky test, generic/085 on 6.10-rc2 and fs-next. It's failing on both ext4 and xfs, and it reproduces more easiy with the dax config: xfs/4k: 20 tests, 1 failures, 137 seconds Flaky: generic/085: 5% (1/20) xfs/dax: 20 tests, 11 failures, 71 seconds Flaky: generic/085: 55% (11/20) ext4/4k: 20 tests, 111 seconds ext4/dax: 20 tests, 8 failures, 69 seconds Flaky: generic/085: 40% (8/20) Totals: 80 tests, 0 skipped, 20 failures, 0 errors, 388s The failure is caused by a WARN_ON in fs_bdev_thaw() in fs/super.c: static int fs_bdev_thaw(struct block_device *bdev) { ... sb = get_bdev_super(bdev); if (WARN_ON_ONCE(!sb)) return -EINVAL; The generic/085 test which exercises races between the fs freeze/unfeeze and mount/umount code paths, so this appears to be either a VFS-level or block device layer bug. Modulo the warning, it looks relatively harmless, so I'll just exclude generic/085 from my test appliance, at least for now. Hopefully someone will have a chance to take a look at it? Thanks, - Ted