Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id ; Fri, 27 Jul 2001 10:24:36 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id ; Fri, 27 Jul 2001 10:24:26 -0400 Received: from thebsh.namesys.com ([212.16.0.238]:4875 "HELO thebsh.namesys.com") by vger.kernel.org with SMTP id ; Fri, 27 Jul 2001 10:24:07 -0400 Message-ID: <3B61794C.D407B69E@namesys.com> Date: Fri, 27 Jul 2001 18:23:08 +0400 From: Hans Reiser Organization: Namesys X-Mailer: Mozilla 4.77 [en] (X11; U; Linux 2.4.4 i686) X-Accept-Language: en, ru MIME-Version: 1.0 To: Alan Cox CC: bvermeul@devel.blackstar.nl, Erik Mouw , Steve Kieu , Sam Thompson , kernel , ramon@namesys.com Subject: Re: ReiserFS / 2.4.6 / Data Corruption In-Reply-To: Content-Type: text/plain; charset=koi8-r Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org X-Mailing-List: linux-kernel@vger.kernel.org Original-Recipient: rfc822;linux-kernel-outgoing Alan Cox wrote: > > > > and when that hangs the kernel it will also screw up all files touched > > > just before it in a edit-make-install-try cycle. Which can be rather > > > annoying, because you can start all over again (this effect randomly > > > distributes the last touched sectors to the last touched files. Very nice > > > effect, but not something I expect from a journalled filesystem). > > > > > Do you think it is reasonable to ask that a filesystem be designed to > > work well with bad drivers? > > Its certainly a good idea. I think it is a terrible idea.... at least as a general expectation to meet, there may be specifics where things can be done though.... like journaling.... > But it sounds to me like he is describing the > normal effect of metadata only logging. Ah, right you are. Now I understand him. Well, data-journaling that doesn't cost a whole lot of performance awaits reiser4, and reiser4 is at least a year away, we are doing seminars and pseudo-coding now. > > Putting a sync just before the insmod when developing new drivers is a good > idea btw This makes a lot of sense to me. Good suggestion. It should go into our FAQ. Dad, please put it there. Q: I like to dynamically load buggy drivers into the kernel because that is what kernel developers like me do for fun, how can I better avoid data corruption when doing this and using ReiserFS? A: Do sync before insmod. (Alan Cox's good suggestion.) - 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/