From mboxrd@z Thu Jan 1 00:00:00 1970 From: Dave Jones Subject: Re: [LSF/MM TOPIC] Fixing large block devices on 32 bit Date: Fri, 31 Jan 2014 14:26:17 -0500 Message-ID: <20140131192617.GA14098@redhat.com> References: <1391194978.2172.20.camel@dabdike.int.hansenpartnership.com> Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Cc: linux-scsi , linux-ide , linux-fsdevel@vger.kernel.org, linux-mm@kvack.org, lsf-pc@lists.linux-foundation.org To: James Bottomley Return-path: Content-Disposition: inline In-Reply-To: <1391194978.2172.20.camel@dabdike.int.hansenpartnership.com> Sender: owner-linux-mm@kvack.org List-Id: linux-fsdevel.vger.kernel.org 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). Dave [1] http://forum.synology.com/wiki/index.php/What_kind_of_CPU_does_my_NAS_have -- 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