From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754823Ab1G0U1L (ORCPT ); Wed, 27 Jul 2011 16:27:11 -0400 Received: from mailout-de.gmx.net ([213.165.64.23]:39113 "HELO mailout-de.gmx.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with SMTP id S1753454Ab1G0U1I (ORCPT ); Wed, 27 Jul 2011 16:27:08 -0400 X-Authenticated: #11967524 X-Provags-ID: V01U2FsdGVkX1+bx+pXDPSb8yj2iaIXn17/nDkOBjn03WoPEbS8EO SxmvzWJi72v+Va From: =?iso-8859-1?q?R=FCdiger_Meier?= To: Christoph Hellwig Subject: Re: 2.6.xx: NFS: directory motion/cam2 contains a readdir loop Date: Wed, 27 Jul 2011 22:26:55 +0200 User-Agent: KMail/1.9.10 Cc: Bryan Schumaker , Justin Piszcz , "J. Bruce Fields" , linux-nfs@vger.kernel.org, linux-kernel@vger.kernel.org, xfs@oss.sgi.com References: <4E306D09.5030704@netapp.com> <20110727200240.GA16054@infradead.org> In-Reply-To: <20110727200240.GA16054@infradead.org> MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 7bit Content-Disposition: inline Message-Id: <201107272227.03265.sweet_f_a@gmx.de> X-Y-GMX-Trusted: 0 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org On Wednesday 27 July 2011, Christoph Hellwig wrote: > On Wed, Jul 27, 2011 at 03:54:49PM -0400, Bryan Schumaker wrote: > > It should be printing on the second hit of a cookie. > > But looking closer at it it only prints the directory name and not > that of any of the matching cookies, making it pretty useless to > debug any problem. (and it makes my previous question to Justin look > stupid..). > > > But so far I still stick to my previous theory that this sounds like > a directory offset getting reused. How is cache invalidation for > the array supposed to work? And maybe more importantly, given that > he can only reproduce it with a .38 client did any bugs get fixed in > that code recently that might lead to issues with the cache > invalidation? At the time I've started this thread http://comments.gmane.org/gmane.linux.nfs/40863 I had the feeling that the readdir cache changings in 2.6.37 have something to do with these loop problems. After that thread I've accepted that's a general problem with ext4/dirindex and nfs but seeing it again on xfs with just 5000 files I'm in doubt again. cu, Rudi