Received: by 2002:ac0:a591:0:0:0:0:0 with SMTP id m17-v6csp160863imm; Fri, 6 Jul 2018 16:28:08 -0700 (PDT) X-Google-Smtp-Source: AAOMgpcbCu7v4k/Z4zbPFWIxWp1dvKj0zdcS5pvGpRZQcZpaIm9MGaa0ocUL5MZM72llODebs8Rl X-Received: by 2002:a63:501c:: with SMTP id e28-v6mr10992367pgb.114.1530919688111; Fri, 06 Jul 2018 16:28:08 -0700 (PDT) ARC-Seal: i=1; a=rsa-sha256; t=1530919688; cv=none; d=google.com; s=arc-20160816; b=E4Te1t5uVYWGlwR6filBc4GzoVEPTJ2cFlAYsFo/6K1lFgSfgs9fVX7QHDggFztesK x4QMiW7/drFww4VZvWLl1iqVU23pV+91hYePLSDxdlcM3OmtUbWvirhT6XmpgHDwXZOl OCr1c6C/f8/6Ps1yft5Jr1M+WnARmROsDdLpD5l5TctocONccinKPK95WbsVQyYEEKyB zT5y3gHiiknGx4dM0HENQnOiUWZgyYnHW0mWPlnuJrjG0Tlx49QK6ZQe2TzeQwBrKqXm 0dxCTUMiNFm9flMqWspdpUW6LkgUdN1YoA2bPp0fjdHCQRJtFPz/RsQqcAf7IEIf0WVV 0GXA== ARC-Message-Signature: i=1; a=rsa-sha256; c=relaxed/relaxed; d=google.com; s=arc-20160816; h=list-id:precedence:sender:content-transfer-encoding :content-language:in-reply-to:mime-version:user-agent:date :message-id:from:references:cc:to:subject:arc-authentication-results; bh=na9kN9MNkf//pCUD34a2GOdVn0WYVV8XWC7xgiebz80=; b=eKXhLzjmkeyAdoPEHLW5HkwNp3rhrbHVnXjJBNUO1+E0tU/K+uPKwvNy7jGAU9O5GH fyTKimffw7FQa991ux6fZC46Xmp/SeIg/A0l3khx1hGmaC/MknA0x/E8sCfiDapLz2O/ FNHtQEWOE/9p8Ncq2yb7A64VzTPyfDBp8HbV5LjO3Kdvp5hgsQXNo0CqNjKnvPxAI0rU Kzv5FUCcZljHtO3Epy+Timb32UTF9sURjKmvC0iOgXYeqnx0FgSnw+dVNCbqlUSvsuOQ 7PT2We0aIxZEfAjaQYkHzQ7d9eR63mfjz1PTniHWPnU5KNKRZaTqljTbPl5n+JvCfFEG f4Sg== ARC-Authentication-Results: i=1; mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Return-Path: Received: from vger.kernel.org (vger.kernel.org. [209.132.180.67]) by mx.google.com with ESMTP id z18-v6si9664305pfl.209.2018.07.06.16.27.53; Fri, 06 Jul 2018 16:28:08 -0700 (PDT) Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67; Authentication-Results: mx.google.com; spf=pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) smtp.mailfrom=linux-kernel-owner@vger.kernel.org Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933048AbeGFX1Q (ORCPT + 99 others); Fri, 6 Jul 2018 19:27:16 -0400 Received: from www262.sakura.ne.jp ([202.181.97.72]:47416 "EHLO www262.sakura.ne.jp" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932478AbeGFX1O (ORCPT ); Fri, 6 Jul 2018 19:27:14 -0400 Received: from fsav405.sakura.ne.jp (fsav405.sakura.ne.jp [133.242.250.104]) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTP id w66NQVlc072967; Sat, 7 Jul 2018 08:26:31 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Received: from www262.sakura.ne.jp (202.181.97.72) by fsav405.sakura.ne.jp (F-Secure/fsigk_smtp/530/fsav405.sakura.ne.jp); Sat, 07 Jul 2018 08:26:31 +0900 (JST) X-Virus-Status: clean(F-Secure/fsigk_smtp/530/fsav405.sakura.ne.jp) Received: from [192.168.1.8] (softbank126074194044.bbtec.net [126.74.194.44]) (authenticated bits=0) by www262.sakura.ne.jp (8.15.2/8.15.2) with ESMTPSA id w66NQVji072964 (version=TLSv1.2 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Sat, 7 Jul 2018 08:26:31 +0900 (JST) (envelope-from penguin-kernel@I-love.SAKURA.ne.jp) Subject: Re: what trees/branches to test on syzbot To: Andrew Morton Cc: Dmitry Vyukov , Guenter Roeck , "Theodore Ts'o" , Linus Torvalds , Greg Kroah-Hartman , "Eric W. Biederman" , linux-kernel , syzkaller , Stephen Rothwell , David Miller , kbuild test robot References: <873735n3dy.fsf@xmission.com> <20180116173440.GA15893@kroah.com> <81a0eb59-c204-9e36-13b7-88c2ea99ceab@I-love.SAKURA.ne.jp> <20180626141602.GA17788@thunk.org> <876e38d9-95e5-0a93-9c26-7287151b8b53@i-love.sakura.ne.jp> <8c9027d6-ead2-1cca-4410-c8dbbe4bf2ea@I-love.SAKURA.ne.jp> From: Tetsuo Handa Message-ID: Date: Sat, 7 Jul 2018 08:26:32 +0900 User-Agent: Mozilla/5.0 (Windows NT 6.3; WOW64; rv:52.0) Gecko/20100101 Thunderbird/52.9.0 MIME-Version: 1.0 In-Reply-To: <8c9027d6-ead2-1cca-4410-c8dbbe4bf2ea@I-love.SAKURA.ne.jp> Content-Type: text/plain; charset=utf-8 Content-Language: en-US Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Hello Andrew, It seems that syzbot (experimentally ?) restarted testing linux-next. May I ask you to carry temporarily debug printk() patch at https://groups.google.com/d/msg/syzkaller-bugs/E8M8WTqt034/OpadOICfCAAJ for "INFO: task hung in __sb_start_write" case? The bug should be reproduced within a day if executed under syzbot environment. Thus, I'm sure that we don't need to carry this patch for long.