From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-pb0-f47.google.com (mail-pb0-f47.google.com [209.85.160.47]) by kanga.kvack.org (Postfix) with ESMTP id 023FF6B0037 for ; Fri, 31 Jan 2014 18:16:13 -0500 (EST) Received: by mail-pb0-f47.google.com with SMTP id rp16so4991849pbb.20 for ; Fri, 31 Jan 2014 15:16:13 -0800 (PST) Received: from bedivere.hansenpartnership.com (bedivere.hansenpartnership.com. [66.63.167.143]) by mx.google.com with ESMTP id fu1si12096231pbc.194.2014.01.31.15.16.12 for ; Fri, 31 Jan 2014 15:16:13 -0800 (PST) Message-ID: <1391210171.2172.54.camel@dabdike.int.hansenpartnership.com> Subject: Re: [LSF/MM TOPIC] Fixing large block devices on 32 bit From: James Bottomley Date: Fri, 31 Jan 2014 15:16:11 -0800 In-Reply-To: <20140131192617.GA14098@redhat.com> References: <1391194978.2172.20.camel@dabdike.int.hansenpartnership.com> <20140131192617.GA14098@redhat.com> Content-Type: text/plain; charset="ISO-8859-15" Mime-Version: 1.0 Content-Transfer-Encoding: 7bit Sender: owner-linux-mm@kvack.org List-ID: To: Dave Jones Cc: linux-scsi , linux-ide , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, lsf-pc@lists.linux-foundation.org On Fri, 2014-01-31 at 14:26 -0500, Dave Jones wrote: > On Fri, Jan 31, 2014 at 11:02:58AM -0800, James Bottomley wrote: > > > it will only be a couple of years before 16TB devices are > > available. By then, I bet that most arm (and other exotic CPU) Linux > > based personal file servers are still going to be 32 bit, so they're not > > going to be able to take this generation (or beyond) of drives. > > > > 1. Try to pretend that CONFIG_LBDAF is supposed to cap out at 16TB > > and there's nothing we can do about it ... this won't be at all > > popular with arm based file server manufacturers. > > Some of the higher end home-NAS's have already moved from arm/ppc -> x86_64[1] > Unless ARM64 starts appearing at a low enough price point, I wouldn't be > surprised to see the smaller vendors do a similar move just to stay competitive. > (probably while keeping 'legacy' product lines for a while at a cheaper pricepoint > that won't take bigger disks). So yould you bet on the problem solving itself *before* we get 16TB disks? Because if we ignore it, that's the bet we're making. James -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org