From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mail-io1-f54.google.com (mail-io1-f54.google.com [209.85.166.54]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id 14E1417990 for ; Fri, 27 Oct 2023 14:46:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.dk Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=kernel.dk Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=kernel-dk.20230601.gappssmtp.com header.i=@kernel-dk.20230601.gappssmtp.com header.b="OdkEnxxh" Received: by mail-io1-f54.google.com with SMTP id ca18e2360f4ac-7a94c5489a4so831939f.0 for ; Fri, 27 Oct 2023 07:46:03 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=kernel-dk.20230601.gappssmtp.com; s=20230601; t=1698417963; x=1699022763; darn=lists.linux.dev; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :from:to:cc:subject:date:message-id:reply-to; bh=w3WKPOInrEdvQkvpwxwv5Fja/uHzd3UARsSrjsxhvxA=; b=OdkEnxxhEUFnFjsvo4xzdaiVfP+PffuZ8AbmYjngx067FKJP5SzlIviDrjk5P0qRUR Pbt9iP9lt4HrYt8U9Pmzo+6pHMsT0kUYBKBqjOP0kY2AOn+8iNQcO+MeqCLh9JS5v593 mRLE+L3RbYfch6oYlYUndhKKTR2tzLcgP7INS8wQnGLt5zxFtjJ10ejczYEolm4a7CT2 tg5ZELbnR19dlcZBez/V58dwrxDaAhvxR/3DI6ahw3uWje9+Z80GaeuqXv2xz7VBvVLQ qUde5wGmBpYvWyDm+HeU7Zcfrks92KEXRQy3nZ542kEQ8QbbAEVFmo8ZGveR+RalBucG g4bQ== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20230601; t=1698417963; x=1699022763; h=content-transfer-encoding:in-reply-to:from:references:cc:to :content-language:subject:user-agent:mime-version:date:message-id :x-gm-message-state:from:to:cc:subject:date:message-id:reply-to; bh=w3WKPOInrEdvQkvpwxwv5Fja/uHzd3UARsSrjsxhvxA=; b=C1ggf2DeuvPyWU9Phpf4m59JPdaSzQsSrDojHTMT9gtSjoXKnr2QASLEVO2iON4L06 c0OP8Ps6+2G7LGqEUtvAFV48onul2Kp0SfZtFqLqTVMGPqKXu30EfwwoUMY39UKGGweB f/JgLymxiTJoB/doE5YBv1kfsQfY2vhxFTfhjtH9xC/sSvUYnPBTgzqRM/rmR2tgFVxR DpH5fXORq/5rstxhp0PSj8IZofRGaobssKVJtEWSN6xXKHWLXd7iCPMxBq7CYTNm8WYN JFoB279XxFF5DFL8ztVfcPBikYx+Su47j7uQHZRbpxfE7WRSYTKYJOoZp04pcXlq2S03 qH9A== X-Gm-Message-State: AOJu0YyGMoVm+dPkXu1B+zmoqr85lfGYI6iKBx245H+KI4hp8xQ8Zbra wPUTb/Ez+FRY07grOoIocmggSw== X-Google-Smtp-Source: AGHT+IHmCzlqOlY3EomSO6T6RBCPoJ56NrwN0Ratf4Xmk5f2jtUUYWADjfWiLvNvMD7NWy9RJpRVLw== X-Received: by 2002:a6b:500a:0:b0:792:6068:dcc8 with SMTP id e10-20020a6b500a000000b007926068dcc8mr3504618iob.2.1698417962713; Fri, 27 Oct 2023 07:46:02 -0700 (PDT) Received: from [192.168.1.116] ([96.43.243.2]) by smtp.gmail.com with ESMTPSA id h5-20020a0566380f0500b00452a3ffe215sm439470jas.87.2023.10.27.07.46.01 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Fri, 27 Oct 2023 07:46:01 -0700 (PDT) Message-ID: <84a42959-e15f-4128-ae2f-df9650879556@kernel.dk> Date: Fri, 27 Oct 2023 08:46:00 -0600 Precedence: bulk X-Mailing-List: regressions@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: task hung in ext4_fallocate #2 Content-Language: en-US To: Theodore Ts'o Cc: Andres Freund , Dave Chinner , Thorsten Leemhuis , Shreeya Patel , linux-ext4@vger.kernel.org, =?UTF-8?Q?Ricardo_Ca=C3=B1uelo?= , gustavo.padovan@collabora.com, zsm@google.com, garrick@google.com, Linux regressions mailing list , io-uring@vger.kernel.org References: <20231017033725.r6pfo5a4ayqisct7@awork3.anarazel.de> <20231018004335.GA593012@mit.edu> <20231018025009.ulkykpefwdgpfvzf@awork3.anarazel.de> <74921cba-6237-4303-bb4c-baa22aaf497b@kernel.dk> <4ace2109-3d05-4ca0-b582-f7b8db88a0ca@kernel.dk> <20231025153135.kfnldzle3rglmfvp@awork3.anarazel.de> <20231025195539.GA2897448@mit.edu> From: Jens Axboe In-Reply-To: <20231025195539.GA2897448@mit.edu> Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 7bit On 10/25/23 1:55 PM, Theodore Ts'o wrote: > On Wed, Oct 25, 2023 at 09:36:01AM -0600, Jens Axboe wrote: >> >> FWIW, I wrote a small test case which does seem to trigger it very fast, >> as expected: > > Great! I was about to ask if we had an easy reproducer. Any chance > you can package this up as an test in xfstests? Or would you like > some help with that? I think it's good to convert to a test case as-is, would just need to loop X iterations or something rather than go forever. If you want to run with it, please do! -- Jens Axboe