linux-kernel - Re: What to do about the 2TB limit on HDIO

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Message-ID: <47E9E781.4000901@zytor.com>
Date:	Tue, 25 Mar 2008 23:04:49 -0700
From:	"H. Peter Anvin" <hpa@...or.com>
To:	Tejun Heo <htejun@...il.com>
CC:	Greg KH <gregkh@...e.de>, Mark Lord <lkml@....ca>,
	Jens Axboe <axboe@...nel.dk>, Jeff Garzik <jgarzik@...ox.com>,
	Linus Torvalds <torvalds@...l.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Linux Kernel <linux-kernel@...r.kernel.org>,
	IDE/ATA development list <linux-ide@...r.kernel.org>,
	linux-scsi <linux-scsi@...r.kernel.org>
Subject: Re: What to do about the 2TB limit on HDIO_GETGEO ?

Tejun Heo wrote:
> 
>> Since when is the major:minor view of devices the "standard" one that
>> userspace uses?  Last I looked, userspace uses symlinks and lots of
>> other ways of directly accessing block devices in /dev/, and does not
>> rely on major:minor.
> 
> The fact that major:minor is the unique identifier of a device makes it
> a bit special compared to other names on filesystem.
> 

In particular, stat() and friends returns the device number, not a 
device name.

	-hpa
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