From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from relay.sgi.com (relay1.corp.sgi.com [137.38.102.111]) by oss.sgi.com (Postfix) with ESMTP id 552EF7F3F for ; Fri, 14 Nov 2014 15:50:16 -0600 (CST) Received: from cuda.sgi.com (cuda3.sgi.com [192.48.176.15]) by relay1.corp.sgi.com (Postfix) with ESMTP id 419008F8050 for ; Fri, 14 Nov 2014 13:50:13 -0800 (PST) Received: from ipmail04.adl6.internode.on.net (ipmail04.adl6.internode.on.net [150.101.137.141]) by cuda.sgi.com with ESMTP id e4CMEd7OTKCVK7cY for ; Fri, 14 Nov 2014 13:50:10 -0800 (PST) Date: Sat, 15 Nov 2014 08:50:07 +1100 From: Dave Chinner Subject: Re: XFS locking issues in 3.18-rc3+ Message-ID: <20141114215007.GC29950@dastard> References: <20141114052523.GB29950@dastard> MIME-Version: 1.0 Content-Disposition: inline In-Reply-To: List-Id: XFS Filesystem from SGI List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Errors-To: xfs-bounces@oss.sgi.com Sender: xfs-bounces@oss.sgi.com To: Andy Lutomirski Cc: xfs@oss.sgi.com On Fri, Nov 14, 2014 at 01:02:59PM -0800, Andy Lutomirski wrote: > On Thu, Nov 13, 2014 at 9:25 PM, Dave Chinner wrote: > > On Thu, Nov 13, 2014 at 04:57:11PM -0800, Andy Lutomirski wrote: > >> I'm running a kernel somewhere between 3.18-rc3 and 3.18-rc4. I got > >> the warnings below. Is this a known issue? > > > > Yup, false positive. shmem is instantiating an inode under the > > mmap_sem and in doing so taking inode locks under the mmap_sem, > > which triggers other filesystems to issue false warnings about > > mmap_sem <-> inode lock order. > > I still have an enormous flood of warnings even if > CONFIG_PROVE_LOCKING=n. This one is repeated at high frequency: > > [ 70.969118] ------------[ cut here ]------------ > [ 70.969121] WARNING: CPU: 8 PID: 653 at mm/truncate.c:758 > pagecache_isize_extended+0x105/0x110() Fixed in 3.18-rc4. Cheers, Dave. -- Dave Chinner david@fromorbit.com _______________________________________________ xfs mailing list xfs@oss.sgi.com http://oss.sgi.com/mailman/listinfo/xfs