From mboxrd@z Thu Jan 1 00:00:00 1970 From: "Artem S. Tashkinov" Subject: Re: IO errors after "block: remove =?UTF-8?Q?bio=5Fget=5Fnr=5Fvec?= =?UTF-8?Q?s=28=29=22?= Date: Mon, 21 Dec 2015 04:25:12 +0500 Message-ID: <37aeccfa37bb49823a62ae24be554a5a@lycos.com> References: <20151220181801.GA12402@lst.de> Mime-Version: 1.0 Content-Type: text/plain; charset=US-ASCII; format=flowed Content-Transfer-Encoding: 7bit Return-path: Received: from smtprelay0024.b.hostedemail.com ([64.98.42.24]:56573 "EHLO smtprelay.b.hostedemail.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751135AbbLTXad (ORCPT ); Sun, 20 Dec 2015 18:30:33 -0500 In-Reply-To: <20151220181801.GA12402@lst.de> Sender: linux-ide-owner@vger.kernel.org List-Id: linux-ide@vger.kernel.org To: Christoph Hellwig Cc: Linus Torvalds , Kent Overstreet , Ming Lin , Jens Axboe , "Artem S. Tashkinov" , Steven Whitehouse , Tejun Heo , IDE-ML , Linux Kernel Mailing List On 2015-12-20 23:18, Christoph Hellwig wrote: > On Sun, Dec 20, 2015 at 09:51:14AM -0800, Linus Torvalds wrote: >> Kent, Jens, Christoph et al, >> please see this bugzilla: >> >> https://bugzilla.kernel.org/show_bug.cgi?id=109661 >> >> where Artem Tashkinov bisected his problems with 4.3 down to commit >> b54ffb73cadc ("block: remove bio_get_nr_vecs()") that you've all >> signed off on. > > Artem, > > can you re-check the commits around this series again? I would be > extremtly surprised if it's really this particular commit and not > one just before it causing the problem - it just allocates bios > to the biggest possible instead of only allocating up to what > bio_add_page would accept. I'm positive about this particular commit. Of course, it might be another GCC 4.7.4 miscompilation which causes the errors which shouldn't be there but I'm not an expert, so.