From mboxrd@z Thu Jan 1 00:00:00 1970 From: Ingo Molnar Subject: Re: [bug] SCSI/SLUB - latest -git: WARNING: at mm/slub.c:2443 kmem_cache_destroy, scsi_put_host_cmd_pool() Date: Tue, 22 Apr 2008 15:10:20 +0200 Message-ID: <20080422131020.GB7311@elte.hu> References: <20080419085758.GA18612@elte.hu> <1208611357.3280.5.camel@localhost.localdomain> <20080421134925.GK9554@elte.hu> <1208793440.3640.22.camel@localhost.localdomain> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Return-path: Received: from mx3.mail.elte.hu ([157.181.1.138]:51752 "EHLO mx3.mail.elte.hu" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1763527AbYDVNKi (ORCPT ); Tue, 22 Apr 2008 09:10:38 -0400 Content-Disposition: inline In-Reply-To: <1208793440.3640.22.camel@localhost.localdomain> Sender: linux-scsi-owner@vger.kernel.org List-Id: linux-scsi@vger.kernel.org To: James Bottomley Cc: linux-kernel@vger.kernel.org, Pekka Enberg , Christoph Lameter , linux-scsi * James Bottomley wrote: > Thanks ... it looks like we may have trouble from devices that alter > the unchecked isa dma flag after scsi_host_alloc. The guilty parties > appear to be gdth, eata, u14-34f, ultrastor, BusLogic and advansys. > > The trouble is that if you alloc the host with it one way and free it > with it the other, the wrong freelist is used and the ref counts are > invalid. > > Try this pseudo fix: it avoids allocating the freelist until add time > (by which time they should all have fixed the flag). It still doesn't > change the fact that the host is allocated in the wrong region, but > that shouldn't matter too much. ok - do you intend to push this pseudo-fix upstream? If yes then please consider it fixed as far as i'm concerned - i'll re-reply if the warning resurfaces (it wasnt lethal to the bootup otherwise). Or if you've got some other approach/fix then i can test that too. Ingo