Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S965475AbZLQTgx (ORCPT ); Thu, 17 Dec 2009 14:36:53 -0500 Received: (majordomo@vger.kernel.org) by vger.kernel.org id S965448AbZLQTgu (ORCPT ); Thu, 17 Dec 2009 14:36:50 -0500 Received: from 0122700014.0.fullrate.dk ([95.166.99.235]:38897 "EHLO kernel.dk" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S965440AbZLQTgt (ORCPT ); Thu, 17 Dec 2009 14:36:49 -0500 Date: Thu, 17 Dec 2009 20:36:48 +0100 From: Jens Axboe To: Linus Torvalds Cc: tytso@mit.edu, Kyle McMartin , linux-parisc@vger.kernel.org, Linux Kernel Mailing List , James.Bottomley@suse.de, hch@infradead.org, linux-arch@vger.kernel.org Subject: Re: [git patches] xfs and block fixes for virtually indexed arches Message-ID: <20091217193648.GI4489@kernel.dk> References: <20091216043618.GB9104@hera.kernel.org> <20091217132256.GO28962@bombadil.infradead.org> <20091217163036.GE2123@thunk.org> <20091217173957.GG2123@thunk.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 1339 Lines: 37 On Thu, Dec 17 2009, Linus Torvalds wrote: > > > On Thu, 17 Dec 2009, tytso@mit.edu wrote: > > > > Sure, but there's some rumors/oral traditions going around that some > > block devices want bio address which are page aligned, because they > > want to play some kind of refcounting game, > > Yeah, you might be right at that. > > > And it's Weird Shit(tm) (aka iSCSI, AoE) type drivers, that most of us > > don't have access to, so just because it works Just Fine on SATA doesn't > > mean anything. > > > > And none of this is documented anywhere, which is frustrating as hell. > > Just rumors that "if you do this, AoE/iSCSI will corrupt your file > > systems". > > ACK. Jens? I've heard those rumours too, and I don't even know if they are true. Who has a pointer to such a bug report and/or issue? The block layer itself doesn't not have any such requirements, and the only places where we play page games is for bio's that were explicitly mapped with pages by itself (like mapping user data).o We fix driver crap like that, we don't work around it. It's a BUG. -- Jens Axboe -- 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/