Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759336Ab0HETaz (ORCPT ); Thu, 5 Aug 2010 15:30:55 -0400 Received: from mx1.redhat.com ([209.132.183.28]:51510 "EHLO mx1.redhat.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1759275Ab0HETas (ORCPT ); Thu, 5 Aug 2010 15:30:48 -0400 From: Jeff Moyer To: Vladislav Bolkhovitin Cc: Tejun Heo , Jens Axboe , stable@kernel.org, Bryan Mesich , scst-devel@lists.sourceforge.net, linux-kernel@vger.kernel.org, linux-raid@vger.kernel.org, dm-devel@redhat.com, Neil Brown Subject: Re: [PATCH RESEND 1/2 block#for-linus] bio, fs: update READA and SWRITE to match the corresponding BIO_RW_* bits References: <20100628010346.GA2376@atlantis.cc.ndsu.nodak.edu> <4C28EFD6.2070203@vlnb.net> <20100714190325.GA25148@atlantis.cc.ndsu.nodak.edu> <4C3EF3AD.5070509@vlnb.net> <20100723191844.GB31152@atlantis.cc.ndsu.nodak.edu> <4C4D7DF5.9060909@vlnb.net> <20100727220110.GF31152@atlantis.cc.ndsu.nodak.edu> <4C5073F3.1060406@vlnb.net> <4C52A98A.7060507@kernel.org> <20100802104227.79340b49@notabene> <4C56D30A.3000403@kernel.org> <4C5B0994.1070203@vlnb.net> X-PGP-KeyID: 1F78E1B4 X-PGP-CertKey: F6FE 280D 8293 F72C 65FD 5A58 1FF8 A7CA 1F78 E1B4 X-PCLoadLetter: What the f**k does that mean? Date: Thu, 05 Aug 2010 15:30:20 -0400 In-Reply-To: <4C5B0994.1070203@vlnb.net> (Vladislav Bolkhovitin's message of "Thu, 05 Aug 2010 22:57:24 +0400") Message-ID: User-Agent: Gnus/5.110011 (No Gnus v0.11) Emacs/23.1 (gnu/linux) MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1452 Lines: 34 Vladislav Bolkhovitin writes: > Jeff Moyer, on 08/05/2010 10:45 PM wrote: >> Tejun Heo writes: >> >>> Commit a82afdf (block: use the same failfast bits for bio and request) >>> moved BIO_RW_* bits around such that they match up with REQ_* bits. >>> Unfortunately, fs.h hard coded READ, WRITE, READA and SWRITE as 0, 1, >>> 2 and 3, and expected them to match with BIO_RW_* bits. READ/WRITE >>> didn't change but BIO_RW_AHEAD was moved to bit 4 instead of bit 1, >>> breaking READA and SWRITE. >>> >>> This patch updates READA and SWRITE such that they match the BIO_RW_* >>> bits again. A follow up patch will update the definitions to directly >>> use BIO_RW_* bits so that this kind of breakage won't happen again. >>> >>> Stable: The offending commit a82afdf was released with v2.6.32, so >>> this patch should be applied to all kernels since then but it must >>> _NOT_ be applied to kernels earlier than that. >> >> Would someone be so kind as to remind me how this problem manifests >> itself? I know I read this recently, but my memory and googling skills >> are both failing me. :( > > See http://lkml.org/lkml/2010/7/28/315 and link inside. Thanks a ton! -Jeff -- 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/