Date: Sat, 2 Nov 2002 20:57:31 +0100
From: Petr Baudis <pasky@ucw.cz>
To: Andries.Brouwer@cwi.nl
Cc: marcelo@connectiva.com.br, hch@lst.de, linux-kernel@vger.kernel.org,
       torvalds@transmeta.com, viro@math.psu.edu
Subject: Re: [PATCH] [2.4.19] Extended /proc/partitions
Message-ID: <20021102195731.GA2535@pasky.ji.cz>
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	hch@lst.de, linux-kernel@vger.kernel.org, torvalds@transmeta.com,
	viro@math.psu.edu
References: <UTC200211021919.gA2JJMk20461.aeb@smtp.cwi.nl>
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Dear diary, on Sat, Nov 02, 2002 at 08:19:22PM CET, I got a letter,
where Andries.Brouwer@cwi.nl told me, that...
> (1) These ioctls are used by existing programs. So, for example,
> 	# hdparm -g /dev/hda5
> will give you the starting offset (in 512-byte sectors) of /dev/hda5.
> Even better may be a command like
> 	# blockdev --report
> 
> (2) Several programs, like mount, *fdisk, blockdev, read
> /proc/partitions. Changing the format will break all of these.
> So, it is best not to change anything, but if you do, only add
> fields at the end.
> 
..snip..
> 
> Given this uncertainty about what comes after the currently present
> fields, it is now impossible to add anything new, unless all programs
> using /proc/partitions also parse the header line.
> It is best to consider /proc/partitions frozen. Linux 2.5 has
> driverfs, and although "cat /proc/partitions" is much more convenient
> than searching around in driverfs (sysfs), no doubt blockdev will be
> changed so as to report on sysfs, when that exists and is mounted.

Ah.. I see, then please disregard the patches. Didn't realize that hdparm
already can do it nor that it's exported thru driverfs in 2.5, sorry.

-- 
 
				Petr "Pasky" Baudis
.
This host is a black hole at HTTP wavelengths. GETs go in, and nothing
comes out, not even Hawking radiation.
                -- Graaagh the Mighty on rec.games.roguelike.angband
.
Public PGP key && geekcode && homepage: http://pasky.ji.cz/~pasky/
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