From: Theodore Ts'o Subject: Re: fuzz testing an ext4fs file system under a 32 bit Linux user mode linux guest let task jbd2/ubda hang Date: Sat, 9 Aug 2014 16:00:18 -0400 Message-ID: <20140809200018.GG15431@thunk.org> References: <53DE3E92.3060304@gmx.de> <20140803184210.GV24826@thunk.org> <53E66C57.8010303@gmx.de> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Transfer-Encoding: QUOTED-PRINTABLE Cc: linux-ext4@vger.kernel.org, UML devel To: Toralf =?iso-8859-1?Q?F=F6rster?= Return-path: Received: from imap.thunk.org ([74.207.234.97]:52557 "EHLO imap.thunk.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751055AbaHIUJw (ORCPT ); Sat, 9 Aug 2014 16:09:52 -0400 Content-Disposition: inline In-Reply-To: <53E66C57.8010303@gmx.de> Sender: linux-ext4-owner@vger.kernel.org List-ID: On Sat, Aug 09, 2014 at 08:45:43PM +0200, Toralf F=F6rster wrote: >=20 > BTW may I just ask, if the following (same 32 bit system, host and > UML guest are both at v3.16, 4 trinity childs hammering victims > files in a ramdisk within the uML guest) matches the above too ? Or > does the BUG output here more helpful data ? : Unfortunately, there's nothing useful here. There is more than one BUG_ON() in this mpage_release_unused_pages function, and what's more, we have no idea which syscall or combination of syscalls might have left a page in a particular state. - Ted -- To unsubscribe from this list: send the line "unsubscribe linux-ext4" i= n the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html