Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1759071Ab0HES5d (ORCPT ); Thu, 5 Aug 2010 14:57:33 -0400 Received: from moutng.kundenserver.de ([212.227.126.186]:52351 "EHLO moutng.kundenserver.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751837Ab0HES5b (ORCPT ); Thu, 5 Aug 2010 14:57:31 -0400 Message-ID: <4C5B0994.1070203@vlnb.net> Date: Thu, 05 Aug 2010 22:57:24 +0400 From: Vladislav Bolkhovitin User-Agent: Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.1.10) Gecko/20100527 Thunderbird/3.0.5 MIME-Version: 1.0 To: Jeff Moyer 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> In-Reply-To: Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Provags-ID: V02:K0:1dUtCQaD4wM7/ypSeSjLHQU9kQGdJIV8sZkTK/9ABF5 UVd3u5e1kgUHB+eo9CZajwHo5Fxx34uovQ8H70tUrdAlr136n5 /GD0K/WTVq+wVsaNOoIoqK100PgfDTygHHp2QDTv0eRnE9cbE4 w2QBOMrh7bQf3BaWxT/5ci/Ked0sGfSqk2uUAzElnt2WI8167h 7BrdxZAko5MgOzNxS+EZA== Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1366 Lines: 31 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. Vlad -- 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/