Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S934288AbZIDVVa (ORCPT ); Fri, 4 Sep 2009 17:21:30 -0400 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S934148AbZIDVV2 (ORCPT ); Fri, 4 Sep 2009 17:21:28 -0400 Received: from rtr.ca ([76.10.145.34]:60968 "EHLO mail.rtr.ca" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S933903AbZIDVV2 (ORCPT ); Fri, 4 Sep 2009 17:21:28 -0400 Message-ID: <4AA184D7.1010502@rtr.ca> Date: Fri, 04 Sep 2009 17:21:27 -0400 From: Mark Lord Organization: Real-Time Remedies Inc. User-Agent: Thunderbird 2.0.0.23 (X11/20090817) MIME-Version: 1.0 To: Ric Wheeler Cc: Krzysztof Halasa , Christoph Hellwig , Michael Tokarev , david@lang.hm, Pavel Machek , Theodore Tso , NeilBrown , Rob Landley , Florian Weimer , Goswin von Brederlow , kernel list , Andrew Morton , mtk.manpages@gmail.com, rdunlap@xenotime.net, linux-doc@vger.kernel.org, linux-ext4@vger.kernel.org, corbet@lwn.net Subject: Re: wishful thinking about atomic, multi-sector or full MD stripe width, writes in storage References: <20090828064449.GA27528@elf.ucw.cz> <20090828120854.GA8153@mit.edu> <20090830075135.GA1874@ucw.cz> <4A9A88B6.9050902@redhat.com> <4A9A9034.8000703@msgid.tls.msk.ru> <20090830163513.GA25899@infradead.org> <4A9BCCEF.7010402@redhat.com> <20090831131626.GA17325@infradead.org> <4A9BCDFE.50008@rtr.ca> <20090831132139.GA5425@infradead.org> <4A9F230F.40707@redhat.com> <4A9FA5F2.9090704@redhat.com> <4A9FC9B3.1080809@redhat.com> <4A9FCF6B.1080704@redhat.com> In-Reply-To: <4A9FCF6B.1080704@redhat.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 632 Lines: 18 Ric Wheeler wrote: .. > You must disable the write cache on these commodity drives *if* the MD > RAID level does not support barriers properly. .. Rather than further trying to cripple Linux on the notebook, (it's bad enough already).. How about instead, *fixing* the MD layer to properly support barriers? That would be far more useful, productive, and better for end-users. Cheers -- 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/