linux-kernel - Re: [PATCH RFC] char/tty_io: fix legacy pty name when more than 256 pty devices are requested

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Message-ID: <20090910011320.3a6ec797@caramujo.chehab.org>
Date:	Thu, 10 Sep 2009 01:13:20 -0300
From:	Mauro Carvalho Chehab <mchehab@...radead.org>
To:	"H. Peter Anvin" <hpa@...or.com>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	Kay Sievers <kay.sievers@...y.org>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Alan Cox <alan@...ux.intel.com>,
	Greg Kroah-Hartman <gregkh@...e.de>
Subject: Re: [PATCH RFC] char/tty_io: fix legacy pty name when more than 256
 pty devices are requested

Em Tue, 08 Sep 2009 21:46:01 -0700
"H. Peter Anvin" <hpa@...or.com> escreveu:

> Actually it's [7:4][*:8][3:0].  It was the easiest way to get backwards
> compatibility, since it allowed for the use of s[n]printf().  It's not
> by any means the only possibility, but I think the easiest one to describe.
> 
> > From one side, I liked the idea of not having any arbitrary maximum limit, but
> > from other side, It seems easier to implement than to describe it in English,
> > at devices.txt. Maybe the solution is to explain it by examples.
> > 
> > Also, if we look at the current device designation, we already have some rule
> > changes. 
> 
> That doesn't mean it's a good idea.

True. Given the idea of using an unique algorithm to populate the namespace, I agree
that your proposal is a good alternative.

I just sent the patch with the feedbacks I had. I tried to do my best to describe it in
simple yet precise terms at devices.txt.

Thanks,
Mauro
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