From owner-freebsd-hackers@freebsd.org Thu Dec 24 07:10:18 2015 Return-Path: Delivered-To: freebsd-hackers@mailman.ysv.freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:1900:2254:206a::19:1]) by mailman.ysv.freebsd.org (Postfix) with ESMTP id 9C77EA50983 for ; Thu, 24 Dec 2015 07:10:18 +0000 (UTC) (envelope-from danny@cs.huji.ac.il) Received: from kabab.cs.huji.ac.il (kabab.cs.huji.ac.il [132.65.116.210]) (using TLSv1 with cipher DHE-RSA-AES256-SHA (256/256 bits)) (Client did not present a certificate) by mx1.freebsd.org (Postfix) with ESMTPS id 58B451989 for ; Thu, 24 Dec 2015 07:10:18 +0000 (UTC) (envelope-from danny@cs.huji.ac.il) Received: from chamsa.cs.huji.ac.il ([132.65.80.19]) by kabab.cs.huji.ac.il with esmtp id 1aC02L-0006vk-DR; Thu, 24 Dec 2015 09:10:09 +0200 Content-Type: text/plain; charset=utf-8 Mime-Version: 1.0 (Mac OS X Mail 8.2 \(2104\)) Subject: Re: Should DEBUG_VFS_LOCKS messages be reported as bugs? From: Daniel Braniss In-Reply-To: <567B4E08.1000204@rawbw.com> Date: Thu, 24 Dec 2015 09:10:09 +0200 Cc: Rick Macklem , Freebsd hackers list Content-Transfer-Encoding: quoted-printable Message-Id: <2B571D55-0B24-4E75-AA5B-4CCF9D3B8CD5@cs.huji.ac.il> References: <567791E9.50207@rawbw.com> <56779542.8020205@rawbw.com> <1331010544.139156804.1450706805234.JavaMail.zimbra@uoguelph.ca> <567B4E08.1000204@rawbw.com> To: Yuri X-Mailer: Apple Mail (2.2104) X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 24 Dec 2015 07:10:18 -0000 > On 24 Dec 2015, at 03:44, Yuri wrote: >=20 > On 12/22/2015 01:34, Daniel Braniss wrote: >> I have been using unionfs for a very long time, mounting /etc (nfs = read only) and md >> whiteout any problems. I=E2=80=99m not sure if i tested it on 11, but = i will soon. >> yes, it can be problematic for other crazy things, but in my case, = where many of >> my hosts are dataless so the unionfs is a great simplifier:-) >>=20 >> just my 2 cents. >>=20 >=20 > I tried to replace nullfs+unionfs with unionfs+unionfs, and got the = same messages using the kernel with the same debug options. > So it is dangerous. >=20 I just turned off WITNESS/INVARIANTS :-) the only complain I get is when I do a mountd restart, but it=E2=80=99s = harmless. danny > Yuri >=20