Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1761253AbXKICLg (ORCPT ); Thu, 8 Nov 2007 21:11:36 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S1756922AbXKICL2 (ORCPT ); Thu, 8 Nov 2007 21:11:28 -0500 Received: from filer.fsl.cs.sunysb.edu ([130.245.126.2]:53744 "EHLO filer.fsl.cs.sunysb.edu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751157AbXKICL2 (ORCPT ); Thu, 8 Nov 2007 21:11:28 -0500 Date: Thu, 8 Nov 2007 21:11:25 -0500 Message-Id: <200711090211.lA92BPB5022618@agora.fsl.cs.sunysb.edu> From: Erez Zadok To: Paul Albrecht Cc: Denys Vlasenko , LKML Subject: Re: unionfs and sys_readahead In-reply-to: Your message of "Wed, 07 Nov 2007 14:43:39 CST." <1194468220.5538.10.camel@albrecht.rdi1.com> X-MailKey: Erez_Zadok Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1477 Lines: 36 In message <1194468220.5538.10.camel@albrecht.rdi1.com>, Paul Albrecht writes: > On Wed, 2007-11-07 at 19:53 +0000, Denys Vlasenko wrote: > > On Tuesday 06 November 2007 22:01, Paul Albrecht wrote: > > > Hi, > > > > > > Whenever I use readahead-list on a union mounted file system I get a > > > segfault and kernel oops so I'm wondering whether or not the linux > > > unionfs supports sys_readahead. > > > > > > Anyone know? I'm not usually subscribed to the lkml so please cc me in > > > your response. Thanks. > > > > Please show actual oops output. > > > > Also: what kernel version do you use? any extra patch(es) applied? .config? > > I'm using a stock generic kernel that's shipped with ubuntu. Here's my > dmesg output containing two oops. The first occurs during boot and the > second happens whenever I run readahead-list from the command line > against a file list containing an entry in a union mounted filesystem: [...] > [ 25.551441] Registering unionfs 1.4 The problem appears most likely because this version of Ubuntu is still using the very old Unionfs 1.x. I wasn't able to reproduce the bug with the latest Unionfs 2.x. I'm in touch with the Ubuntu guys to try and help them move to 2.x. Cheers, Erez. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/